WO2012000869A1

WO2012000869A1 - System and method for mounting and enclosing ventilation ducts

Info

Publication number: WO2012000869A1
Application number: PCT/EP2011/060480
Authority: WO
Inventors: Lars-Åke Mattsson; Niclas Ivarsson; Pontus Andersson; Anders Lundberg
Original assignee: Lindab Ab
Priority date: 2010-07-02
Filing date: 2011-06-22
Publication date: 2012-01-05
Also published as: SE535721C2; SE1050734A1; EP2588686A1

Abstract

A system (10) for installing, supporting and cover-up of ventilation ducts (20) and support brackets (30) for mounting to floors, walls and/or ceilings, wherein the support brackets are attached to the floors, walls and/or ceilings and the ventilation ducts are attached to the support brackets. Guiding means (37, 50) are positioned at the support brackets and adapted for attachment to the floors, walls and/or ceilings by means of the support brackets, which guiding means are arranged in relation to each other, the support brackets, and the ducts at predetermined points on the brackets for control of the positioning of the brackets, the ducts, and the guiding means in relation to each other when these parts are assembled. A method for installing the above system is also disclosed.

Description

SYSTEM AND METHOD FOR MOUNTING AND ENCLOSING

VENTILATION DUCTS

Technical Field of the Invention

The present invention relates to a system for supporting and enclosing ventilation ducts and support brackets for mounting to walls and/or ceilings, which system comprises at least one support bracket, wherein the support bracket is adapted to be attached to the walls and/or ceilings and the ventilation ducts. The present invention also relates to a support bracket and to a method of installing a system for supporting and enclosing at least one ventilation duct and at least one support bracket for mounting to walls and/or ceilings, wherein the support bracket is attached to the walls and/or ceilings and the ventilation duct.

Background Art

When renovating old buildings only having natural ventilation, i.e.

buildings without any ventilation system for forced supply of air into the building, often mechanical ventilation, with the object of installing an intake air system, the new ventilation systems must be covered or enclosed after assembly and installation, so that the appearance of the building, as much as possible, is restored to its former condition. This covering of the new ventilation system is usually done by several different workmen with varying competence, i.e. firstly, a contractor for making holes in the building does his part, then, a contractor for installation of the ventilation system does his part. After that a carpenter for covering the installed ventilation system does his part afterwards by use of slabs of wood/plywood and associated equipment, and, in cases where the coverage is done by using other materials, e.g. sheet metal, a plate worker must be used, or plastic, then a worker used to this is used, among others. Finally, in the case when wood is used as coverage, a painter or an upholsterer does the final part by a last surface treatment.

There are a lot of known systems used for "cover-up" of different channels and ducts, e.g. for covering the lower parts of chimneys and cooker hood ventilators that are visible in houses above the kitchen range/stove. The workman that is to mount the cover-up over associated equipment measures and marks up the desired dimensions of the necessary parts for assembling the cover-up system, e.g. support brackets for the cover panels and also the panels themselves, and then cuts the parts. The workman has to use several different tools to be able to perform both the cutting and the assembly of the parts forming the cover-up. Tools for adapting and assembling cover-up systems of metal are for example boring-machines and/or screwdrivers, iron cutting saws (as the prior art support brackets and cover panels often are made of relatively thick metal), nibbling machines, plate shears, and power- driven cutting machines. The boring-machines may be used for making holes, but are normally also used as screw drivers when assembling the support structure and the cover-up panels by screwing the support structure onto associated surfaces, e.g. walls, ceilings and floors, and screwing the panels onto the support structure, and therefore it is necessary to frequently change from drill to screw bit and back again, or to have two different boring- machines. Handheld iron cutting saws or cutting machines are used to cut the associated parts by freehand cutting, if necessary, aided by the pencil marks.

One drawback of the known systems and methods for covering duct systems is that a lot of manpower is involved as several people do their work in a chain-like way of working meaning that the following workman can not do his part before the former workman has finished his work. Another drawback is that a lot of different tools have to be used and carried around. Power- driven tools are also bulky and heavy and therefore not easy to move around on a work site. This make it difficult to install the cover-up systems quickly and efficiently and with a minimum of effort, especially when using the heavy power-driven tools and also when trying to supervise and synchronize several workmen with different competences and job descriptions. Another drawback is that the heavily-loaded workman must perform numerous cuts each time such a cover-up system is installed risking overstress. Further, it is necessary to take off the burrs from the ends of the panels and brackets when these parts are cut by iron cut saws or other powered cutting machines.

Special systems for enclosing or covering lines, pipes or tubes, e.g. tubes for ventilation duct systems, have therefore been developed. One example of such a specialised sheet metal enclosure system is described in EP 0 420 308 A1 . This enclosure uses one support profile for fitting

continuously along a wall and support elements protruding transversely thereof for supporting external enclosure parts substantially parallel to the support profile.

However, it is still necessary to use a lot of manpower with differing competence for installing the different parts making up the enclosure system. Moreover, in the prior art, a large number of different and separate fastening means, e.g. screw, bolts and nuts, welding, and separate clamps, are used for attaching the enclosure systems to walls, floor and ceilings and also for attaching the separate components of the enclosure systems, e.g. support profiles, support brackets, bearing and clamping plates, separate enclosure parts such as front panels and grid parts, and so on, to each other. Moreover, a power driven cutting tool or different tools, e.g. angle grinders and iron cut saws for cutting up the desired length of the parts to be cut, e.g. the support profile and the enclosure parts are necessary. Further, angle grinders are in many cases not a very attractive option for cutting, in particular for cutting ducts for ventilation systems. This is especially true when working indoors, which is often the case when assembling ventilation duct systems. Angle grinders are very noisy, thereby giving rise to a risk of hearing impairment and necessitating hearing protectors. Further, cutting with an angle grinder creates sparks, thus representing a fire hazard. Moreover, any grindings may hit and adhere to surfaces that are subjected to moisture, e.g. bathrooms or kitchens, risking that the grindings start rusting and stains the surface.

Additionally, the grindings may damage eyes. Furthermore, because of its working principle, an angle grinder and an iron cut saw give rise to burr on the inside of the cut part. Therefore, the cut part has to be deburred before the parts are connected to each other, e.g. by using a file or knife for deburring, which adds to the number of tools and the associated weight carried around. Otherwise the burr may damage sealing rings, the hands of the fitter and the like. Unfortunately, known systems for enclosing or covering lines, pipes or tubes, e.g. tubes for ventilation duct systems, is not particularly flexible when it comes to the choice of cutting tool.

Summary of the Invention

It is an object of the invention to provide a system and method for installing, supporting and covering ventilation ducts, which solve, or at least lessen, the problems mentioned above.

It is an object of the invention to provide an easy installment, support and cover-up of ventilation ducts by enabling the use of only one person to both install and covering the ventilation ducts, e.g. the ventilation fitter.

Another object of the invention is to provide an installment, support and cover-up of ventilation ducts that provide both an ergonomically sound way of working and an ergonomically sound working posture.

Yet another object of the invention is to provide an installment, support and cover-up of ventilation ducts that reduces the number of tools used and the weight associated therewith when carrying around the tools and handling part of the system by the fitter.

A further object of the invention is to provide an installment, support and cover-up of ventilation ducts that make it possible to cut associated parts forming the enclosure system without creating burr on the inside of the cut parts and without creating excessive noise or dangerous sparks.

These objects are achieved by means of a system and a support bracket for installing, supporting and covering ventilation ducts as claimed in the associated independent claims, preferred variants thereof being defined in the associated dependent claims.

These objects are also achieved by a method for installing, supporting and covering ventilation ducts as claimed in the independent method claim, preferred variants of the method being defined in its associated dependent claims.

The system for supporting and covering ventilation ducts according to the independent system claim makes it possible to simplify and ensure a correct positioning and assembly of the associated parts of the system for one person as less measuring and trial and error fitting have to be done.

The system above for supporting and enclosing ventilation ducts and support brackets for mounting to walls and/or ceilings comprises at least one support bracket, wherein the support bracket is adapted to be attached to the walls and/or ceilings and the ventilation ducts, and further comprises guiding means arranged at the support bracket, wherein the support bracket is adapted to interact with the ventilation ducts and the guiding means to obtain a predetermined relation between the guiding means and the ventilation ducts, which support bracket is arranged at predetermined points for control of the positioning of the guiding means and the ventilation ducts by guiding the guiding means and the ventilation ducts into place in relation to each other when assembled. In one embodiment, the system comprises at least two guiding means arranged at each support bracket.

In some embodiments, the guiding means are integrated in the support brackets or removably/detachably attached to the support brackets by spring clamp fitting. The number of guiding means being integrated or detachably attached guiding means make it possible to ensure that associated parts of the system can be positioned in relation to each other easily, but distinctly, and securely, while enabling easy assembly and disassembly of the system. In some embodiments, the guiding means are removably/detachably held in place by at least one holding shape, and/or the guiding means comprises rails adapted to be detachably fitted into the support bracket by the holding shape, and/or the guiding rails are adapted to be detachably fitted into the holding shape in the form of at least one recess at predetermined points on the support bracket, each recess having a varying shape, and/or the recess comprises a support rail receiving opening being wider than the bottom of the recess.

In other embodiments, the system comprises at least one panel adapted to be detachably attached to the guiding means and to cover the ventilation ducts and the support bracket after assembly, and/or the guiding means are arranged in relation to each other, the support bracket and the ventilation duct at the predetermined points for control of the positioning of the cover panel in relation to the support brackets and the ventilation ducts, wherein the support bracket and the ventilation duct enable any component of the ventilation ducts to be positioned on the face of a cover panel at a distance from the guiding means and any edge of the cover panel after assembly. In some embodiments, the components of the ventilation ducts may be ventilator grills, sleeve couplings and/or air outlets/inlets, and/or each panel is attached to the guiding means by spring clamp fitting, and/or the guiding means are at least partly shaped as spring clamps, and/or shaped as spring clamps along at least a part of their length or along their whole length. In some embodiments, the support bracket is adapted to releasably hold the ventilation ducts in place by at least one tab being foldable by means of perforation in and out of engagement with the ventilation ducts, or the tab is adapted to extend over at least a part of the circumference of the ventilation ducts when in a non-folded state enabling the support bracket to hold the ventilation ducts in place and adapted to expose the ventilation ducts when in a folded state enabling release of the ventilation ducts from the support bracket. In one embodiment, at least one guiding plate is adapted to be placed inside the guiding means at a joint between the guiding means.

The support and enclosure system according to the invention comprises support brackets, the guiding means, and, optionally, the cover panel, the panel is not comprised when no coverage of the ventilation ducts is required.

The support bracket according to the invention for supporting ventilation ducts and for mounting to walls and/or ceilings, wherein the support bracket is adapted to be attached to the walls and/or ceilings and the ventilation ducts, and comprises guiding means, and is adapted to interact with the ventilation ducts and the guiding means to obtain a predetermined relation between the guiding means and the ventilation ducts, which support bracket is arranged at predetermined points for control of the positioning of the guiding means and the ventilation ducts by guiding the guiding means and the ventilation ducts into place in relation to each other when assembled and makes it possible to simplify and ensure a correct positioning and assembly of the associated parts of the system for one person as less measuring and trial and error fitting have to be done.

In some embodiments, the support bracket is adapted to interact with at least two guiding means, in other embodiments the guiding means are integrated in the support bracket or adapted to be detachably attached to the support bracket or the support bracket is adapted to detachably hold the guiding means in place by at least one holding shape.

The effect of the invention is that any ventilator grills, sleeve couplings and/or air in-/outlets are positioned at the desired position, e.g. aligned with adjoining ventilation ducts and/or on the face of the cover panel, and do not end up too close to the ceiling, floor, wall, and the guiding means or even collides with the guiding means and/or any edge and/or corner junction of the cover panel. Hence, the distance from the guiding means and the corner junction of the cover panel, the walls, the ceiling and/or the floor for the ventilator grills, sleeve couplings and/or air in-/outlets is controlled by the inventive support bracket with the help of the guiding means by pre- determining the positioning of the cover panels.

The support bracket, the guiding means, and the cover panels of the system according to the invention are made of sheet metal having a thickness suitable for manual cutting by use of one and the same non- powered cutting tool. This eliminates the need of more than one cutting tool when installing the support and enclosure system and reduces the workload for the workman installing the system. The cutting tool for cutting the above parts of the inventive system is preferably a scissor tool. The fact that a scissor tool is used makes it possible to avoid burr on the guiding means and the panels. Further, a scissor tool does not create dangerous sparks.

The scissor tool is preferably a pair of plate shears. This is a highly efficient tool for cutting without creating sparks and excessive noise.

In one embodiment, any joints between adjoining panels when mounted, is covered by at least one mull ion being detachably attached to the panels by spring clamps. In other embodiments, the mullions are made of sheet metal with a thickness suitable for manual cutting by use of one and the same non- powered cutting tool or made by plastic.

Each mullion may be detachably attached to the panels by at least one tab being foldable between a first state holding the mullion in place over the joint by engagement of the panels and a second state enabling release of the mullion from the joint by disengagement from the panels. Each mullion may also be made by magnetic sheet metal and detachably attached to the panels by at least one magnet.

In some embodiments, the guiding means, the cover panels, and the mullions being made of sheet metal also reduce the weight of the parts making up the system. This reduces the workload on the workman when holding the guiding means, the cover panels, and the mullions during cutting and also during the general handling, mounting and lifting of these parts.

Mullions made of sheet metal with a thickness suitable for manual cutting enable that the mullions may be easily adjusted by cutting in at least one foldable tab in the mullions achieving an easy attachment of each mullion to the panels.

According to the invention, a method of installing a system for supporting and enclosing at least one ventilation duct and at least one support bracket for mounting to walls and/or ceilings comprises attaching the support bracket to the walls and/or ceilings and the ventilation ducts. The method further comprises attaching the support bracket to the walls and/or ceilings in a first position, positioning guiding means at the support bracket, attaching the support bracket against the walls and/or ceilings in a second position, placing the ventilation duct in the support bracket, and arranging the support bracket, so that the ventilation duct and the guiding means obtain a predetermined relation, at predetermined points for control of the positioning of the guiding means and the ventilation duct by guiding the guiding means and the ventilation duct into place in relation to each other when assembling the system.

One embodiment of the method comprises assembling the system by attaching the support bracket against the walls and/or ceilings at appropriate positions by screwing the support bracket against the associated surface in the first position, and then tightening the screws to position the support brackets in the second position. Another embodiment of the method comprises pressing the guiding means against the wall and/or ceiling by the support bracket when tightening the screws.

Yet another embodiment of the method comprises folding a tab into a first position for arranging the support bracket in a ventilation duct receiving or releasing state, and after placing the ventilation duct in the support bracket, folding the tab into a second position for arranging the support bracket in a ventilation duct holding state and vice versa.

The inventive system, support bracket and method for support and coverage of ventilation ducts also make it possible to particularly easy adapt the different parts of the system and thereby the system itself to different dimensions of ventilation ducts, various installation sites as every site may differ in configuration, and different sizes of the installations. The system, support bracket and method according to the invention may be used for covering and enclosing other types of ducts besides ventilation ducts or even in combination with ventilation ducts, e.g. water pipes, electrical cables or even smaller dimensioned cable ducts inside the enclosure system, and ducts for industrial or central vacuum cleaning.

The inventive system, support bracket and method for support and coverage of ventilation ducts also enable an easier manoeuvring of the scissor tool and the part to be cut while cutting. This reduces the workload and effort for the workman installing the system as the number of steps for performing the task is reduced as less or no deburring has to be performed and not more than one cutting tool must be used.

Moreover, the inventive system, support bracket and method for support and coverage of ventilation ducts create an adaptive or self-adjusting configuration by predetermining the relative positioning of the cooperating support bracket and guiding means, in some embodiments, also the cover panels of the system in relation to each other at assembly. Hereby, the need of measuring and holding the support brackets and guiding means, in some embodiments, also the cover panels together during assembly is reduced, and in some operations or steps of assembly, the manual adjusting of the relative positioning of the support brackets and guiding means, in some embodiments, also the cover panels making up the system is eliminated. In other embodiments, especially the guiding means and the cover panels are very easy to dismount for fast access to the ventilation ducts and the other equipment, such as air in-/outlets and electrical outlets.

In some embodiments, only the support brackets for support and coverage of ventilation ducts have to be attached to the walls, ceilings and/or floors using separate fastening means such as screws, while the guiding means, the cover panels, and the mullions of the system are installed by integrated fastening means, e.g. by being a part of the support brackets or by spring clamp fitting, thus making the system easy to transport and stow by reducing the number of parts, fastening means and components required for installation of the whole system.

The support brackets, the guiding means, the cover panels and the mullions preferably are made of thin sheet metal. These parts are thereby easy to install, move around on a work site, to stow and to transport due to lower weight per measure of length. In an embodiment of the inventive method for installment of the system, the cutting tool used is a scissor tool. The method of installing the system according to the invention enables use of guiding means in the form of rails configured such that the rails may be manually cut by means of plate shears to a desired length when to be mounted. In another embodiment of the method, the guiding rails are manually cut by means of plate shears and then manually bent until the rail is broken off to a desired length when to be mounted. In yet an embodiment of the method, the panels are configured such that the panels may be cut by means of a nibbling tool to a desired length and/or shape when to be mounted.

To sum up, the system, support bracket and method according to the invention for support and coverage of ventilation ducts reduces the number of workmen required for installing, and also reduces the number of man-hours required for installment by simplifying the work and reducing the effort of handling and installing the system and its associated parts. Moreover, the support brackets, the guiding means, the cover panels and the mullions are easy to prefabricate and then, at the site, easy to adjust in length, shape, and/or dimension to the particular requirements at that site.

Brief Description of the Drawings

The invention will be described in more detail with reference to the appended drawings, which show examples of presently preferred

embodiments of the invention.

Fig. 1 is a side view of a system for supporting and enclosing ventilation ducts according to the invention with support brackets, guiding means, cover panels and ventilation ducts.

Fig. 2 is a perspective view of the support and enclosure system assembled in Fig. 1 .

Fig. 3 is a perspective view partly showing the system of Figs. 1 and 2 without cover panels.

Fig. 4 is a side view partly showing the system of Figs. 1 -3 without support brackets and ventilation ducts.

Fig. 5 is a perspective view showing the cover panels of the system in Figs. 1 and 2, Fig. 6 is a side view showing parts of the system in Figs. 1 to 5 where the cover panel is attached to the guiding means,

Fig 7 is a side view of a support bracket in the system of Figs. 1 to 3,

Fig 8 is a perspective view of the guiding means in Figs. 1 to 4 and 6, Fig. 9 is a side view of the guiding means in Fig. 8,

Figs. 10 to 12 are perspective and side views of parts of the system in Figs. 1 to 2 showing how the guiding means are joined together by a lengthening piece and the lengthening piece separately ,

Fig 13 is a side view of another support bracket in Fig. 7 without any panel.

Fig 14 is a side view of the support bracket in Fig. 13 with a panel assembled

Fig 15 shows a cover piece or mullion mounted over a joint between cover panels,

Fig 16 shows another mullion at a joint between cover panels during assembly or disassembly, and

Fig 17 shows yet another mullion separately, i.e. not yet mounted.

Detailed Description of the Invention

The system 10 for supporting and covering ventilation tubes or ducts 20 shown in Figs. 1 to 17 is specifically designed for easy installment and cover up of the ventilation ducts, in particular helically wound lock seam ventilation ducts. The support and enclosure system 10 has a support structure in the form of support brackets 30 for detachable attachment to floors, ceilings and/or walls and guiding means 50 for detachable attachment of at least one cover panel 40 at least partly enclosing the parts of the system, when mounted. In some aspects, e.g. if the system 10 is to be installed in industrial environments, no cover panels are necessary as there is no similar esthetic requirement in industrial environments, i.e. the system does not have to make the ventilation ducts 20 "invisible" in industrial environments.

On the support structure 30, 50, at least one panel or a plurality of panels 40 and at least one mullion 60, which mullion is used as a cover piece for covering any joint between cover panels if more than one cover panel is mounted, are to be mounted for covering the guiding means 50, the support brackets 30 and the ventilation ducts 20 after assembly. One support bracket 30 is shown in Figs 1 -3, 7, 13 and 14 and has a shape similar to a claw or grip with a fixed shape and dimension that is to be adapted for each type and dimension of the ventilation ducts 20 depending on the duct dimension. The support bracket has the function of detachably gripping or clutching the ventilation ducts such that the ventilation ducts are easily introduced into and removed from engagement with the support bracket 30 when assembling or disassembling the ventilation ducts.

Alternatively, the support bracket 30 could be adapted to support other types of ducts or tubes instead of ventilation ducts 20 or in combination with ventilation ducts, e.g. water pipes, cable ducts of smaller size that fit inside the enclosing cover panels 40, electrical cables and/or ducts for industrial or central vacuum cleaning systems. More than one ventilation duct could be supported and enclosed in parallel with each other.

The system 10 is assembled by attaching the support bracket 30 in a first position against the walls, ceiling and/or floors at appropriate positions by screwing the bracket loosely against the associated surface by screws introduced through fastening holes 36 in the support bracket and into fastening holes in the walls, ceilings and/or floors after the necessary holes for intake of air among other required measures has been made. The procedure of making the inlet holes in the building before the installation of the support and cover-up system 10 is not explained in more detail as the making of these air inlet holes is done in a known way.

In one aspect of the invention, the guiding means 50 are integrated in the support bracket 30 meaning that the next step in installing the support and cover-up system 10 is to tighten the screws in the fastening holes 36.

In another aspect of the invention, the guiding means 50 are separate components meaning that the next step in installing the support and cover-up system 10 is to introduce the guiding means, e.g. in the form of separate loose rails 50, detachably into the support bracket 30, and then tighten the screws in the fastening holes 36 for arranging the support bracket in a second position. The guiding rails 50 may in this aspect be pressed tightly against wall, ceiling, and/or floors by a foot-like part 30a, 30b on the support bracket 30 when the screws are tightened (see Figs. 1 and 7). In Fig 7, the foot-like parts 30a, 30b is formed by folding the support bracket at a folding line (see the arrows in Fig 7) such that the part with the fastening hole 36 forms the foot-like part extending in a plane being perpendicular to the plane of the support bracket after folding, i.e. the foot-like parts extend in a direction being a normal vector to the extension plane of the support bracket. After the bracket is mounted by placing its foot-like parts 30a, 30b on the walls, floors and/or ceilings and attaching the support bracket to the associated surface by screwing, the ventilation ducts 20 are mounted by being put into the support bracket 30 and then secured therein (this is explained further below).

Then, at least one cover panel 40 is detachably fitted into the guiding means 50 by being pressed into or over predetermined points on the guiding means due to the fact that the guiding means work as spring clamps 51 (this is also explained in further structural detail below).

Finally, at least one mullion 60 is detachably attached to the panels 40 over the joint between two panels, i.e when more than one panel 40 is used, for covering the associated joint, e.g. by spring clamps 61 in the similar way as the panels themselves when attached to the guiding means 50. This mullion may also be used for covering any joints between panels in corners, i.e. corner panels for both outer and inner corners (not shown). These outer and inner corner panels may be detachably fastened to the other panels 40 by means of a similar spring clamp fitting as for the cover panels 40.

Each of the support brackets 30 has a base portion with the foot-like parts 30a, 30b and the fastening holes 36 for attaching the bracket to the wall, ceiling and/or floor by means of screws or similar fastening means. The holes 36 may be oblong or oval for enabling the bracket 30 to be somewhat adjusted before the screws are finally tightened for achieving a tolerance to faulty installation, warped surfaces and misadjustments.

Each support bracket has a duct receiving opening 37 or recess adapted to be at least partly closed or exposed by foldable portions 31 or members similar to foldable tabs, as shown in Figs. 1 , 3, 7 and 13. The duct receiving recess 37 of each support bracket 30 is adapted for enclosing at least 180° of the circumference of the duct 20 when the duct is held by the bracket and to enclose about or less than 180° of the circumference of the duct when the duct is introduced into or removed from the bracket. This varying width or gap of the duct receiving recess 37 is achieved by the tabs 31 being foldable from and towards each other manually along a folding line formed by perforations 32 achieving a similar function for the tabs 31 , i.e. similar to arms being movable in and out of engagement with the duct. In most cases, the tabs 31 may be folded at least 90°, i.e. the tabs may be folded between one position in which the tabs extend in a substantially perpendicular direction or radially in relation to the longitudinal direction of the duct 20 and another position in which the tabs extend in a direction being substantially in parallel with the longitudinal direction of the duct.

Each of the foldable tabs 31 forming part of the duct receiving recess 37 is foldably attached to the bracket 30 at a base portion, where a hinge function is enabled by the perforations 32 along the respective folding line. Each foldable tab 31 also has a free end with an additional foldable portion 38 also being foldable by other perforations 32' (see Fig 7). This second foldable tab 38 is provided with a hole 39 at the free end for enabling the fastening of the duct 20 by use of a screw for screwing the tab onto the ventilation duct when the duct is placed in the bracket. This second foldable tab 38 is foldable towards the duct into a first position, and in some cases in contact with the duct, such that the second foldable tab 38 extends substantially in parallel with the longitudinal direction of the duct. The second foldable tab 38 is also foldable away from the duct into a second position, and it also follows the movement of the first foldable tab 31 , at least partly as this second foldable tab is part of the end of the first foldable tab 31 . This second foldable tab 38 is also part of the support bracket 30 in Fig 13 in the same way as in Fig 7.

Moreover, the support brackets 30 may be made of sheet metal, e.g. by cutting or punching the brackets out of sheet metal, with the shape similar to an L when viewed from the side. The duct receiving recess or opening 37 is arranged between the legs of the L. The duct receiving recess 37 extends in the plane of the support bracket, which plane has a normal vector

substantially parallel to the longitudinal direction of the duct 20 when the duct is placed in the support bracket. The duct receiving recess comprises a contact surface for the duct, the contact surface having at least one contact point for the duct along a curve or contour line or contour edge being a portion of a semicircle with a radius R that may be adapted for different dimensions of ducts, whereby different brackets 30 are used for different dimensions of ducts as the dimension of each bracket may be varied in correspondence with the radius R (see Fig 7). The contact surface is formed by both an inner non-movable contour line and an outer movable contour line in form of the foldable tab portions 31 , 38, i.e. the boundary or border line between the fixed inner contact surface and the outer movable tab portions 31 , 38 is the folding line of the first foldable tab 31 . The folding line of the first foldable tabs 31 is the dashed line also defining the base portion of these tabs 31 along the perforations 32 closest to the support bracket as shown in Figs. 1 , 7 and 13.

Each support bracket 30 as shown in Figs. 1 , 7, 13 and 14 has the junction corner of the legs of the L shaped as a bevelling, but could of course have a sharp junction corner or a curved one. This chamfer shape is used for making it possible to install the support brackets 30 against corners not being straight and/or at right angles and if any irregularities or cables for electricity exist at the corner, i.e. the support brackets have been provided with this shape for achieving a clearance at their corner area.

The support and cover-up system 10 comprises the support or guiding means 50 positioned at the support brackets 30. These guiding means are arranged to the support brackets such that the brackets interact with the ventilation ducts 20 and the guiding means for achieving a predetermined relationship or orientation or relative positioning between the guiding means and the ducts after assembly. This predetermined relation is achieved in that the support brackets are arranged at predetermined points for control of the positioning of the guiding means and the ventilation ducts by guiding the guiding means and the ventilation ducts into place in relation to each other when assembled. This predetermined relation is also achieved in that the guiding means are arranged at predetermined points on the brackets. This arrangement eliminates the need of additional guiding means and/or reduces manual measurement by the workman when installing the system comprising the support brackets, and the guiding means. Hence, the assembly of the components forming the support and cover-up system 10 for the ventilation system is done in a predetermined way that is tolerant to faulty installation and misadjustments, in particular in old buildings, where walls, ceilings and floors most likely are skew. In principle, this arrangement and system 10 gives an almost "automatic" adjustment making the different parts of the system "falling into place" when assembled together, as the support brackets 30 by being arranged at predetermined points control the positioning of the guiding means 50 and the ventilation ducts 20 by guiding the guiding means and the ventilation ducts into place in relation to each other when assembled.

The guiding means 50 may be integrated in the support brackets 30 or be detachably attached to the support brackets by being fitted into a holding shape, 33, 34, 35, i.e. at least one recess 33, and, in most cases, pressed by the foot-like part 30a, 30b on the support brackets against the surface that is contacted (see Fig 7), e.g. the wall and/or the ceiling. This fitting is achieved by detachably fitting the guiding means into the positioning or guiding recess 33 at predetermined points on the support brackets 30. Each positioning recess 33 has a varying shape such that the guiding means are guided into the recess and held in place by the same. This achieves a controllable and faulty correcting function simplifying the alignment and positioning of the guiding means and the support brackets in place and in relation to each other. Each of the positioning recesses 33 has a guiding means receiving opening 34 being wider than the bottom 35 of the recess meaning that when the guiding means are fitted into the recess, the narrowing shape of the recess 33 creates a misalignment adjusting effect that "catches" the guiding means as the wide opening 34 creates a large "hit area" and the narrow bottom 35 holds or clamps the guiding means securely in place. This reduces the work load on the installer before final assembly, i.e. before the final tightening of the screws securely joining the support bracket 30 and the guiding means 50 and pressing these parts against the associated surfaces as the installer may be less accurate when fitting in the parts during assembly as the wider opening 34 is easier to target.

The guiding rails 50 may extend substantially in parallel with the ducts

20 when the guiding rails are fitted into the support brackets 30.The guiding rails 50 may at least partly be shaped as spring clamps 51 . The guiding rails may also be shaped as spring clamps 51 along at least a part of their length or may be shaped as spring clamps along their whole rail length. The system 10 may also comprise at least one cover panel or a plurality of panels 40, and not only one panel, being adapted for detachable

attachment to the integrated guiding means or the separate rails 50 at predetermined points on the support brackets 30. The panels may be detachably attached along two parallel panel ends 41 , 42 extending along the ventilation ducts 20 when the ducts are assembled. The panels are intended for covering the ventilation ducts and the support brackets, and for at least partly covering the guiding means after assembly, such that the new installed ventilation system is not that visible, i.e. the installed ventilation system should be as invisible as possible after mounting of the panels. The panels 40 are bent into a cross-section with a shape substantially similar to an L, when viewed from the side, having a part 43 of the free ends or legs of the L bent such that the free end 43 extends in direction perpendicular to the direction of the legs of the L, and inwards, i.e. the two free ends 43 of the panel may extend in a direction that if prolonged would coincide in a point opposite the junction of the bases of the legs of the L-shape. Each panel 40 as shown in Figs. 1 , 2, 4, 5 has the junction corner shaped as a beveling, but could of course have a sharp junction corner or a curved one as shown in Fig 14. This beveled shape increases the sturdiness of the panel 40. In Fig 14, the free panel edge 43 is bent more than 90° towards the bracket 30, i.e. the intermediate angle between the inside of the panel 40 and the plane of extension of its edge 43 is less than 90°.

The guiding means 50 are at least partly shaped as spring clamps 51 enabling the panel ends 41 , 42, i.e. the free panel ends 43 to be detachably fitted over or into the guiding means. The guiding means may be shaped as spring clamps 51 along their whole length for attachment of the panels along the whole length of the panel ends 41 , 42, 43. This would mean that the separate guiding rails 50 form a continuous spring clamp fitting 51 (see Figs 1 to 4) and that the guiding means integrated on the support bracket 30 form a discontinuous spring clamp fitting 51 (see Figs 13 and 14). In Figs 13 and 14 the spring clamp fitting is achieved by the guiding means 50 being shaped as a lip over which the panel end edge 43 is pressed such that the edge 43 then snaps in place behind the lip for detachably holding the panel end 41 , 42 against each support bracket. Hence, in either case, this means that a sufficient number of portions of the length of the panel ends and the support means are spring clamped together, even though there is a distance between each bracket along which distance the panel end 41 , 42 are not supported. An advantage with the continuous spring clamping by means of the continuous support rails 50 is that the whole length of the ends 41 , 42 of the cover panels 40 are held and supported, whereby there is no risk of deflection of the cover panel surfaces between the support brackets 30. Moreover, the length of the guiding rails 50 guides the brackets in relation to each other and along the ducts during and after assembly.

Hence, the guiding means and rails 50 are also arranged in relation to each other, the support brackets 30 and the ducts 20 at the predetermined points for enabling the support brackets to interact and control the positioning of the guiding means and the panels 40 in relation to each other, in addition to the brackets and the ducts, after assembly.

The guiding rails 50 are configured such that one end 54 of the guiding rails is free and adapted to fit into the opening 34 of each recess 33 on each support bracket 30 (see Figs. 1 , 2, 4, and 6). The other end 53 of the guiding rails 50, when viewing the cross-section of the rail, is formed by folding this free end 53 double or tripple (see Fig 9), such that an opening of a recess is formed for receiving the panel edge ends 43, which opening is wide enough but narrows down and the double or tripple fold shape 51 gives a spring clamp effect when the panel ends 41 , 42, i.e. the panel end edge 43 has been introduced sufficiently far into the recess, e.g. past a certain distance into the guiding rail end 53 or when it touches the bottom of the recess (see Figs. 4 and 6). The rail 50 may be made of sheet metal and has substantially a U-shaped cross-section where the free support rail end 54 forms one leg of the U and extends in a plane being perpendicular to the base portion of the U. The other end 53 is an elongation of the other leg of the U but is directed at right angle, i.e. in parallel with the base portion of the U, and towards the other end 54, i.e. this other end 53 is perpendicular to the legs of the U and points inwards of the U. This other end 53 is formed as explained above by double or triple folding this end forming a slit-like shape 51 with a spring clamp function by a clamping force created by the bent end (see Fig .9). The guiding rails 50 are preferably made of metal for creating the clamping force by using for example bent sheet metal.

The support and enclosure system 10 may also comprise at least one guiding plate 70 being adapted to be placed inside a joint 52 between two lengths of the guiding rails 50 (see Figs. 10-12). This may be required when two lengths or ends of guiding rails are to be joined, e.g. if a length of the support rail is to be lengthened or extended by another length of guiding rail or if the guiding rail can not pass by a certain distance along a wall, ceiling or floor due to the existence of a physical obstruction on that surface. This physical obstruction may be a cover over any outlet, e.g. a terminal for electricity or a socket-outlet or any other relatively low obstruction at a wall, ceiling or floor that the support rails extends over when installed, and which cover has to be easily accessible after installation of the system 10.

This guiding plate 70 shown in Figs 10 to 12 enables cutting off the part of the guiding rail 50 that were to extend over this low obstruction that may be almost flush with the surface, i.e. only protruding slightly above the surface, and then cutting the guiding plate into a length somewhat longer than the cut away guiding rail part and fit this piece of guiding plate on the inside of the cut off guiding rail or using a guiding plate with a prefabricated suitable

dimension (see Fig 10). Then, the cut off guiding rail part is placed together with the guiding plate back between the guiding rails now having two ends adjacent the obstruction, one end ending before the obstruction and the other end extending from beyond the obstruction such that the guiding plate extends past, on the inside, and over the joints 52 between the guiding rail ends and holds these two ends of the support rail together and in alignment with each other (see Fig 1 1 ). As this guiding plate 70 is detachable, the obstruction is easily accessed by first removing the panel 40 at this portion of the system 10 and then removing the guiding rail part 50 and the guiding plate 70 without having to disassemble the support brackets 30 and the whole length of the guiding means 50 if for example an electrician wants access to the socket-outlet later on. The guiding plate 70 has essentially the same shape or cross-section as the guiding rail (see Fig 12), the only differences are that the guiding plate is diminished in size to fit inside the guiding rail and that the guiding plate has no double or triple folded leg ends as the guiding rail. This guiding plate 70 enables the cover panels 40 to be attached to the cut off lengthening piece of the guiding rail 50 and supported along this lengthening area.

Each mullion 60 may be detachably attached to the panels 40 over the adjoining joint by at least one tab 61 being foldable between a first state holding the mullion in place over the joint by engagement of the panels and a second state enabling release of the mullion from the joint by disengagement from the panels (see Figs 15 to 17). An alternative solution would be to make each mullion in a magnetic sheet metal and detachably attach each mullion to the panels by at least one magnet. Another possible attachment of the mullion is to combine at least one foldable mullion fastening tab 61 with at least one magnet.

Preferably, all of the parts, i.e. the support brackets 30, the panels 40, the guiding means/rails 50, the mullions 60, and the guiding plate 70 are made of sheet metal. This reduces the weight of each part and also the assembled system 10 such that handling, transport and cutting of the parts into desirable dimensions is facilitated. Moreover, if the sheet metal is thin, e.g. has a thickness of between 0.2 and 1 .0 mm or between 0.4 and 0.8 mm or preferably about 0.7 mm, the effort when cutting any part and the weight is further reduced. Furthermore, the preferred thicknesses also optimize the sturdiness and rigidity of the parts without making the separate parts and the assembled system 10 too "limpy".

Other enhancements due to the inventive system 10 are for example that plate shears and the use of them is familiar to a ventilation fitter, whereby the cuts performed in the thin sheet metal make it possible to ensure a straight cut during free-hand cutting, in particular, even if the cut is not perfectly straight, the fitter may easy manoeuvre plate shears and the part to be cut and compensate for any deflections. Moreover, due to the sheet metal used, the plate shears can also be used for bending suitable portions of the part after cutting if the shape or the cut area has to be adjusted to fit as

appropriate easily and quickly as the fitter does not have to discard any parts or use any other tool for bending and adjustment of the part to be installed.

The support brackets 30 can be used for different dimensions of ducts/tubes 20 and still keep a predetermined distance, within limits, between the wall, ceiling and/or floor and the centre of the duct such that the ventilation ducts are able to be aligned with other connections or adjoining ventilation systems already present in the building. Moreover, the predetermined distance between the wall, ceiling and/or floor and the duct also enables the possibility of isolating between the duct and the associated surface in the building for reducing the risk of fire hazards in ventilation systems and also any undesired noise from the working ventilation.

One important advantage is also that the interaction of the support brackets 30 with the ventilation ducts 20, the guiding means 50, and in some cases also with the cover panels 40, achieves a predetermined relation between these parts and arrange them at predetermined points or positions in relation to each other, whereby the distance from the guiding means 50 and the corner junction of the cover panel 40, the walls, the ceiling and/or the floor, and the beveled panel corner shown in Fig 1 for the ventilator grills, sleeve couplings and/or air outlets or other components is mainly controlled by the support bracket 30 with the help of the guiding means.

The support bracket 30 is especially adapted for tubes with diameters of 80 to 315 mm, or larger diameters, but may of course be designed for any other dimensions as the duct receiving recess 37 may have the radius R adapted for any suitable duct dimension. This recess 37 also acts as a guiding and support means for the ducts 20 and co-operates with the guiding means/rails 50.

This support and enclosure system 10 also enables cutting by hand requiring only one hand for operation due to a low weight. The plate shears may be replaced by another cutting tool, e.g. a nibbler.

The provision of the system 10 and the support bracket according to the invention reduce the number of components, e.g. fastening means, forming the system, and reduces the number of tools required for installing the system into one tool for cutting parts and one tool for screwing the support brackets 30 against the appropriate surfaces.

The inventive system 10 may also be used for covering vertically extending ventilation ducts 20 and not just horizontally extending ducts, i.e. the system may support and cover any ducts extending from the ceiling to the floor or vice versa. The system 10 may also be used for coverage of ducts extending over the face of a wall, ceiling or floor instead of along a corner area, as shown in Fig 1 . In that case, the cover panels 40 must be shaped so that they cover three sides and not only two sides, as shown. The support brackets 30 would also in that case have a somewhat differing shape similar to an U-shape and not a L-shape as shown.

The mullions 60 could be shaped in a way that enables a telescopic function, i.e. the mullions could be able to be displaced along the panels 40 and over each other telescopically and the joints of the panels. Another version of the mullions could be panel- or drape-like that may be pulled aside for covering and exposing the joints of the cover panels 40.

In regard of the guiding means 50 integrated directly into the support brackets 30, these integrated guiding means could work as snap connections (see Figs 13 and 14). In Fig 14 the cover panel has its edge ends 43 bent towards the ends 41 and 42 such that the angle between them is less than 90°, whereby a springy effect is achieved, i.e. the shape of the panel 40 and its edge ends 43 enable the panel edge ends 43 to be pressed over and past the guiding means 50 and then be detachably held in place by a resilient snap fitting.

One aspect of the invention relates to a system 10 for supporting and enclosing ventilation ducts 20 and support brackets 30 for detachable mounting to walls and/or ceilings (and/or floors), wherein the system comprises at least one support bracket, and the support bracket is adapted to be detachably attached to the walls and/or ceilings (and/or floors) and the ventilation ducts, c h a r a c t e r i z e d in that at least one panel 40 is adapted to be detachably attached to the guiding means 50 along the ducts 20 for covering the ducts and the support brackets, and the guiding means are arranged at the support bracket extending perpendicularly to the longitudinal direction of the support rails.

In another aspect of the invention, a system 10 has guiding means 50 that are configured such that the guiding means may be cut by means of plate shears to a desired length when to be mounted. Yet another aspect of the invention relates to a system 10, wherein the guiding means 50 are configured such that the guiding means may be manually cut by means of plate shears and then manually bent until the guiding means is broken off to a desired length when to be mounted. An additional aspect of the invention relates to a system 10, wherein the guiding means 50 are made by sheet metal and configured by means of folding into a shape enabling a spring clamp fitting of the panel 40. Still another aspect of the invention relates to a system 10, wherein the panel 40 is configured such that the panel may be cut by means of a nibbling tool to a desired length when to be mounted.

Another aspect of the invention relates to a system 10 for supporting and enclosing ventilation ducts 20 and support brackets 30 for detachable mounting to walls and/or ceilings (and/or floors), wherein the system comprises at least one support bracket, and the support bracket is adapted to be detachably attached to the walls and/or ceilings (and/or floors) and the ventilation ducts, c h a r a c t e r i z e d in that the support bracket 30 extends perpendicularly to the longitudinal direction of the ventilation ducts 20, which support bracket is adapted to releasably hold the ventilation ducts in place by at least one tab 31 , 38 being foldable by means of perforation 32, 32' in and out of engagement with the ducts.

In another aspect of the invention, a system 10 comprises the tab 31 , 38 being adapted to extend over at least a part of the circumference of the ventilation ducts 20 when in a non-folded state enabling the support bracket 30 to hold the ducts in place and adapted to expose the ducts when in a folded state enabling release of the ducts from the support bracket.

Yet another aspect of the invention relates to a system 10 comprising at least one or a plurality of panels 40 and guiding means 50 for detachable mounting to the walls, floors and/or ceilings, wherein the panels are detachably attached to the guiding means along the guiding means for covering the ducts 20 and the support bracket 30, and covering the guiding means at least partly.

Still another aspect of the invention relates to a system 10, wherein the guiding means 50 are detachably attached to the support bracket 30 at predetermined points for control of the positioning of the guiding means in relation to each other, the panels 40 and the brackets. This enable any ventilator grills, sleeve couplings and/or air outlets/inlets to be positioned on the face of each cover panel at a distance from the guiding means and any edge of the cover panel after final assembly of the system 10. In any of the aspects of the invention explained above, the guiding means 50 may be shaped as separate rails. Each rail 50 may be detachably fitted into at least one recess 33 at the predetermined points on the support bracket 30. One aspect of the invention relates to a method for cutting the guiding means/rail 50 by using plate shears into a desired length before mounting. Another aspect of the invention relates to a method for manually cutting the guiding means/rail 50 by means of plate shears and then manually bending the guiding rail until the guiding rail is broken off to a desired length when to be mounted. In yet another aspect of the invention, a method for assembling the system 10 includes cutting the panel 40 by means of a nibbling tool to a desired length before assembly.

Yet another aspect of the invention relates to a method for folding the guiding rail 50 into a shape at least partly along their length enabling holding a first part 54 of the guiding rail detachably to the support bracket 30 after assembly of the guiding rail and the bracket.

Still another aspect of the invention relates to a method including detachably mounting at least one panel 40 or a plurality of panels to the guiding means or rail 50 by means of a spring clamp fitting of the guiding means or rail at a second guiding means or rail part 53, whereby the spring clamp fitting is achieved by folding this second guiding means or rail part into a clamp, e.g. by double or triple folding if using sheet material when making the support means/rail 50.

In all of the aspects of the inventive system 10 above, the system may be used as a ventilation system, i.e. the ventilation ducts 20 may have any end or any air outlet open inside the cover panels 40, so that air blows into at least a part of the cover-up system making the panels together with the other parts of the system also working as ventilation ducts. In that aspect, a slit opening letting this air out of the system may be achieved by not letting the cover panels extend lengthwise all the way into sealing contact with a wall, ceiling and/or floor extending for example perpendicular to the longitudinal direction of the ventilation ducts and cover panels. Instead, the cover panel end only extends into a position close to the adjoining perpendicular wall/ceiling/floor such that a clearance is made between the wall/ceiling/floor and the end of the cover panel for the air to pass by (imagine that a adjoining wall/ceiling/floor is placed to the left in Fig 2 close to the duct end and cover panel end at that area).

In another aspect of the invention, the system 10 may be installed only partially in a room, i.e. the system may end at a wall in the middle of a room or at any other location relatively far from any surface perpendicular to the cover panel 40, whereby the end of the ventilation duct 20 at this location is plugged by a lid or cover. Hence, the cover panel at this end also ends and a hole is created at the end, which hole has to be covered, e.g. by a cap or lid having an appearance corresponding to the cover panel. These lids, covers or caps would then for example be placed over the duct end and cover panel end shown to the left in Fig 2.

When at least one cover panel 40 is mounted over the support bracket 30, the ventilation ducts 20 and other parts of the system 10 inside the cover panel are easy accessed as the cover panel is very easy to dismount from the guiding means 50 and the support bracket. Furthermore, the ventilation ducts are easily mounted at and dismounted from the support bracket. The system 10 also enables the prefabrication of cover panels with predetermined dimensions, shapes and design. The system 10 also enhances the alignment of ventilation ducts meeting other ducts or ducts passing through the back of the system, i.e. past the support brackets 30 and not the front through the cover panels being the normal passageway, e.g. through a back

wall/ceiling/floor, as the relative positioning of the associated parts of the inventive system is predictable and predetermined in both directions. This is shown to the right in Fig 1 with a dotted passage through an imaginary back wall.

The system 10 is adaptable in size, configuration, length and number of components for installment of the system, so that any components, both on the inside of the cover panels 40 and on the outside of the cover panels, necessary for installing the ventilation system, are accommodated.

The system 10 also gives the possibility of extending, i.e. move any electrical sockets or other outlets out from a wall and/or ceiling, if in the way, and instead place the electrical sockets or the other outlets on the face of any of the cover panels 40. The first foot-like parts 30a, 30b are equipped with the fastening holes 36. The second foot-like parts 30c, 30d have the function of pressing the guiding rails 50 towards the wall, ceiling and/or floor to which the bracket 30 is attached and are fitted into a part of the inside of the U-shape of the guiding rails as shown in Figs 1 and 3.

According to the invention, the method of installing the system 10 and at least one support bracket 30 comprises attaching the support bracket to the walls and/or ceilings and the ventilation ducts 20. The method further comprises attaching the support bracket to the walls and/or ceilings in a first position, positioning guiding means at the support bracket, attaching the support bracket against the walls and/or ceilings in a second position, placing the ventilation duct in the support bracket, and arranging the support bracket, so that the ventilation duct and the guiding means obtain a predetermined relation, at predetermined points for control of the positioning of the guiding means and the ventilation duct by guiding the guiding means and the ventilation duct into place in relation to each other when assembling the system. Moreover, the method comprises assembling the system by attaching the support bracket against the walls and/or ceilings at appropriate positions by screwing the support brackets against the associated surface in the first position, and then tightening the screws positioning the support brackets in the second position. Furthermore, the method comprises pressing the guiding means against the wall and/or ceiling by the support bracket when tightening the screws. The method may further comprise folding a tab into a first position for arranging the support bracket in a ventilation duct receiving or releasing state, and after placing the ventilation duct in the support bracket, folding the tab into a second position for arranging the support bracket in a ventilation duct holding state. system for supporting and enclosing ventilation ducts ventilation ducts

support brackets

a first foldable portion/tab

, 32' perforation

positioning/guiding recess

recess opening

recess bottom

hole for fastening to the walls, ceilings and/or floors duct guiding/receiving opening or recess

a second foldable portion/tab

hole for fastening to the duct

panels

a first panel end

a second panel end

an outer bent part/free end of the panel end guiding/support means/rails

spring clamps

joint between guiding means

a first part of the guiding means

a second part of the guiding means

mullions

foldable mullion tabs

guiding plate

Claims

1 . A system (10) for supporting and enclosing ventilation ducts (20) and support brackets (30) for mounting to walls and/or ceilings, which system comprises at least one support bracket, wherein the support bracket is adapted to be attached to the walls and/or ceilings and the ventilation ducts, which system further comprises guiding means (37, 50) arranged at the support bracket (30), wherein the support bracket is adapted to interact with the ventilation ducts (20) and the guiding means to obtain a predetermined relation between the guiding means and the ventilation ducts,

c h a r a c t e r i z e d in that guiding means (37) are integrated in the support bracket (30) and guiding means (50) are detachably attached to the support bracket, whereby the support bracket is arranged at predetermined points for control of the positioning of the detachable guiding means and the ventilation ducts by guiding the detachable guiding means and the ventilation ducts into place in relation to each other when assembled.

2. A system (10) according to claim 1 , wherein at least two guiding means (37, 50) are arranged at each support bracket (30).

3. A system (10) according to claim 1 or 2, wherein the detachable guiding means (50) are removably held in place by at least one holding shape (33, 34, 35).

4. A system (10) according to claim 3, wherein the detachable guiding means (50) comprises rails adapted to be removably fitted into the support bracket (30) by the holding shape (33, 34, 35).

5. A system (10) according to claim 4, wherein the guiding rails (50) are adapted to be detachably fitted into the holding shape in the form of at least one recess (33, 34, 35) at predetermined points on the support bracket (30), each recess having a varying shape.

6. A system (10) according to claim 5, wherein the recess (33) comprises a support rail receiving opening (34) being wider than the bottom (35) of the recess.

7. A system (10) according to any preceding claim, comprising at least one panel (40) adapted to be removably attached to the detachable guiding means (50) and to cover the ventilation ducts (20) and the support bracket (30) after assembly.

8. A system (10) according to claim 7, wherein the detachable guiding means (50) are arranged in relation to each other, the support bracket (30) and the ventilation duct (20) at the predetermined points for control of the positioning of the cover panel (40) in relation to the support brackets and the ventilation ducts, wherein the support bracket and the ventilation duct enable any component of the ventilation ducts to be positioned on the face of a cover panel at a distance from the detachable guiding means and any edge of the cover panel after assembly.

9. A system (10) according to claim 8, wherein each panel (40) is attached to the detachable guiding means (50) by spring clamp fitting (51 ).

10. A system (10) according to claim 9, wherein the detachable guiding means (50) are at least partly shaped as spring clamps (51 ).

1 1 . A system (10) according to claim 10, wherein the detachable guiding means (50) are shaped as spring clamps (51 ) along at least a part of their length.

12. A system (10) according to claim 1 1 , wherein the detachable guiding means (50) are shaped as spring clamps (51 ) along their whole length.

13. A system (10) according to any preceding claim, wherein the support bracket (30) is adapted to releasably hold the ventilating ducts (20) in place by at least one tab (31 ) being foldable by means of perforation (32, 32') in and out of engagement with the ventilation ducts.

14. A system (10) according to claim 13, wherein the tab (31 ) is adapted to extend over at least a part of the circumference of the ventilation ducts (20) when in a non-folded state enabling the support bracket (30) to hold the ventilation ducts in place and adapted to expose the ventilation ducts when in a folded state enabling release of the ventilation ducts from the support bracket.

15. A system (10) according to any preceding claim, wherein at least one guiding plate (70) is adapted to be placed inside the detachable guiding means (50) at a joint (52) between the detachable guiding means.

16. A support bracket (30) for supporting ventilation ducts (20) and for mounting to walls and/or ceilings, wherein the support bracket is adapted to be attached to the walls and/or ceilings and the ventilation ducts ,

c h a r a c t e r i z e d in that the support bracket (30) further comprises integrated guiding means (37), and is adapted to interact with the ventilation ducts (20) and guiding means (50) being adapted for detachable attachment to the support bracket to obtain a predetermined relation between the detachable guiding means and the ventilation ducts, which support bracket is arranged at predetermined points for control of the positioning of the detachable guiding means and the ventilation ducts by guiding the detachable guiding means and the ventilation ducts into place in relation to each other when assembled.

17. A support bracket (30) according to claim 16, wherein the support bracket (30) is adapted to interact with at least two guiding means (37, 50).

18. A support bracket (30) according to claim 16 or 17, wherein the support bracket (30) is adapted to removably hold the detachable guiding means (50) in place by at least one holding shape (33, 34, 35).

19. A method of installing a system (10) for supporting and enclosing at least one ventilation duct (20) and at least one support bracket (30) for mounting to walls and/or ceilings, wherein the support bracket is attached to the walls and/or ceilings and the ventilation ducts, c h a r a c t e r i z e d by attaching the support bracket (30) to the walls and/or ceilings in a first position,

positioning guiding means (50) being detachably attached to the support bracket, at the support bracket,

attaching the support bracket against the walls and/or ceilings in a second position,

placing the ventilation duct (20) in guiding means (37) being integrated in the support bracket, and

arranging the support bracket, so that the ventilation duct and the detachable guiding means obtain a predetermined relation, at predetermined points for control of the positioning of the detachable guiding means and the ventilation duct by guiding the detachable guiding means and the ventilation duct into place in relation to each other when assembling the system (10).

20. The method according to claim 19, comprising assembling the system (10) by attaching the support bracket (30) against the walls and/or ceilings at appropriate positions by screwing the support bracket against the associated surface in the first position, and then tighten up the screws positioning the support bracket in the second position.

21 . The method according to claim 20, comprising pressing the detachable guiding means (50) against the wall and/or ceiling by the support bracket (30) when tightening up the screws.

22. The method according to any of the claims 19 to 21 , comprising folding a tab (31 , 38) into a first position for arranging the support bracket

(30) in a ventilation duct receiving or releasing state, and after placing the ventilation duct (20) in the support bracket, folding the tab into a second position for arranging the support bracket in a ventilation duct holding state.