WO2022200198A1

WO2022200198A1 - Building service element

Info

Publication number: WO2022200198A1
Application number: PCT/EP2022/057105
Authority: WO
Inventors: Jens Stefan OEHLER; Emanuel HEISENBERG
Original assignee: ecoworks GmbH
Priority date: 2021-03-24
Filing date: 2022-03-18
Publication date: 2022-09-29
Also published as: EP4121618A1

Abstract

The invention relates to a building service element for fastening in front of an outer wall of a building. The building service element is particularly suitable for use in the context of an energy-related building renovation and, in this context, for fastening in front of the outer wall of an existing building. The building service element has a modular and flexible design and enables different types of supply systems per flat.

Description

Buildinq service element

Description

The invention relates to a building service element for fastening in front of an outer wall of a building and in particular of an existing building. It can be used in particular in the context of an energy-efficient building renovation, but is also suitable for use in new buildings.

Achieving the goal set by numerous governments of reducing emissions and energy consumption as comprehensively as possible requires, among other things, extensive renovation of the existing building stock. Preferably, the refurbishment should ultimately enable buildings to be operated in a CCh-neutral manner. Numerous approaches to energy-efficient building refurbishment have already been developed and tested in the past, but for various reasons they have been problematic or at least have not gained acceptance on a significant scale. A "serial renovation" to climate- neutral buildings based on the principles of the Passive House Standard is currently being discussed in Germany as a promising concept.

The German patent application DE 102021 107 398.7 discloses a process for energy- efficient building refurbishment that includes, as an essential process element, covering the outer walls of existing buildings with prefabricated flat facade elements and building service elements. The building service elements should contain as much of the necessary building services as possible so that major construction work inside the building can be dispensed with during refurbishment. At the same time, the building service elements, together with the facade elements, are to form a flush and attractive outer surface of the buildings. The object of the invention is to provide a building service element that meets these requirements and can supply residential units with the respective required building technology on the basis of different supply variants.

Against this background, the invention relates to a building service element for fastening in front of an outer wall of a building and, in particular, of an existing building, wherein the building service element has a casing which comprises at least one receiving region with preassembled domestic engineering components and a shaft region running through the casing from top to bottom, wherein the receiving region and the shaft region are arranged next to one another, and wherein the building service element has, on the front side, a large-area or full-area access opening through which both the receiving region and the shaft region are accessible and which is reversibly closed.

For reversible closure of the access opening, the building service element has at least one closure element in the form of, for example, a door that can be pivoted about a vertical axis or a flap that can be pivoted about a horizontal axis. In one embodiment, the access opening can be closed by means of one or two such doors or flaps, wherein, if necessary, a part of the access opening located in front of the receiving region can be closed by such a door or flap and a part of the access opening located in front of the shaft region can be closed by a further such door or flap.

Preferably, the closure element is thermally insulated. Further preferably, the entire building service element is thermally insulated at least to the front, to the sides and to the top and bottom. In particular, the thermal insulation can be realized by a renewable and biodegradable insulation material, such as cellulose material or wood fiber material. In one embodiment, vacuum insulation is particularly preferred, since such insulations have especially good insulating properties, which, despite relatively thin doors, make it possible to achieve a high insulating effect that is comparable with the facade elements arranged next to them in a possible application of the building service elements. The abutment surfaces between the closure element and the casing are preferably provided with a circumferential seal on at least one side in order to achieve a minimum air leakage rate and the highest possible casing tightness with respect to air exchange, moisture ingress, etc.

The casing of the building service element preferably has a flat rectangular shape. The casing is further preferably higher than wide. Flat preferably means that the length of the shorter side of the casing, mostly the width, is at least three times the depth thereof, and/or that the length of the longer side of the casing, mostly the height, is at least five times the depth thereof.

In one embodiment, the casing is manufactured in a frame construction. In particular, it may comprise an outer frame and one or more struts, wherein a strut may extend between the receiving region and the shaft region. The closure elements for the removal opening may also be manufactured in frame construction. In a preferred embodiment of the invention, the frame is composed of wood material beams. Closed surfaces of the frame may be formed by panels of wood-based materials, gypsum fiberboard, sheet metal or other building materials.

The shaft region is preferably open upwards and downwards, respectively the casing has corresponding passages or recesses. In the region of the receiving region, in a preferred variant the casing is closed at least upwards or downwards, in particular upwards and downwards by means of a ceiling or a floor. The ceiling, the floor or both the ceiling and the floor can be fire-protection-insulated.

In one embodiment, the building service element comprises two shaft regions to the left and right of the receiving region. The description here, which refers only to one shaft region, applies accordingly to both shaft regions. With reference to the building on which the building service element is to be used, the building service element is preferably storey-high.

In one embodiment, the rear side of the building service element is open. This leads to maximum utilization of the available space, in particular in the depth direction, which is limited due to the necessarily flat shape of the building service element. In another variant of the invention, however, a rear wall may also be provided at least area-wise. Area-wise may mean that a rear wall is provided in the shaft region while the receiving region is open at the rear, or conversely that the receiving region is closed at the rear with a rear wall while the shaft region is open at the rear.

In one embodiment, the building service element has at least one pair, and preferably at least two pairs, of fastening elements via which the building service element can be fastened in front of the outer wall of the building. Preferably, the fastening elements of the pair are each arranged at the same height on the left and right of the casing, either on the rear side or preferably on the side of the casing. In this case, one pair of fastening elements is regularly arranged in the upper region of the building service element; in the case of two or more pairs, a second pair may be arranged in the lower region of the building service element. An arrangement at the side of the casing has the advantage that in the application no installation space is lost in the depth for fastening the building service elements and the full depth available for the building service element can be used for accommodating domestic engineering components. The fastening elements may be downwardly open suspension contours such as hooks for suspending the building services element in corresponding mating contours, for example horizontally extending bolts, on the outer wall, and the building may be equipped for this purpose with a fastening system with corresponding contours at the applicable locations.

The domestic engineering components are fastened within the building service element or more specifically within the receiving region of the building service element, preferably laterally, i.e. to vertical structural elements of the casing, for example struts, which are located to the left and right of the receiving region. The domestic engineering components can be fastened directly to these vertical structural elements, or further fastening aids such as horizontal cross members, in particular floors or beams, can be mounted thereon, to which the domestic engineering components are then in turn held. Lateral fastening has the advantage that a rear wall and at least one solid rear wall can be dispensed with.

In particular, it can be provided that the building service element for fastening the domestic engineering components comprises a shelf system with crossbars that can be flexibly inserted into the casing and to which individual domestic engineering components can be fastened. The crossbars can be attached to holders arranged at different heights, such as strips, on vertical structural elements of the casing. In one embodiment, only a subset of these holders is in use. This can occur as a result of a concept in which a uniform casing is to be equipped according to the modular principle with different crossbars for different equipment of domestic engineering components.

The domestic engineering components preferably comprise the necessary or even the entire building services required to supply a residential unit. These include heating, cooling, energy supply, e.g. with electricity, material supply, e.g. with water, disposal of e.g. waste water, aeration and deaeration of the residential unit, measurement of consumption, and the establishment of communication and data connections.

In one embodiment, the domestic engineering components comprise at least one ventilation system in the form of an aeration and deaeration system. The ventilation system may comprise fans for supply air and/or exhaust air respectively outside air and/or outgoing air, as well as air filters. Furthermore, sensors such as temperature sensors may be provided for one or more air streams. Furthermore, a control unit associated at least among other things with the ventilation system may be installed in the building service element. In particular, it may be provided that the ventilation system comprises a heat exchanger for heat recovery, preferably a cross-flow heat exchanger. In one variant, a bypass line is also provided to bypass the heat exchanger during summer operation.

Furthermore, the ventilation system can include a heating register, for example an electric heating register for heating supply air respectively outside air.

In one embodiment, the building service element respectively the ventilation system comprises one or more exhaust air and/or outgoing air heat pumps.

A ventilation opening can be arranged in a part of the closure element in front of the receiving region, which in one embodiment can be adapted in terms of position and size to associated air guide elements of the ventilation system. Sealing elements may be provided on the closure element or the ventilation system, which seal an interface between the ventilation opening and the associated air guide element when the closure element is closed, in order to ensure effective air guidance and prevent an undesirable reduction in the insulating effect of the closure element. The ventilation openings can be covered with a ventilation grille or ventilation fins for protection and/or air conduction. In this case, a short circuit between outside air and outgoing air is to be avoided.

Alternatively, the building service element may comprise an exhaust air system.

In one embodiment, the ventilation system or exhaust air system may be arranged in the upper or middle part of the receiving region. It may be equipped with silencers for supply air and exhaust air.

Further domestic engineering components may include a hot water storage tank, which may have a flat shape. The capacity of the hot water tank can be adapted according to the size of the building service element and can be, for example, between 100 and 200 litres, in particular between 120 and 160 litres. Preferably, a water pipe is located in the shaft region in order to be able to supply the hot water tank with fresh water. In one embodiment, the water storage tank may be planar with respect to the rear side of the casing, or in another embodiment, it may project beyond the rear side (so that when the building service element is installed, it projects into the parapet area of the adjacent room) to provide more depth and for the storage tank. To implement the latter option, the parapet of the existing wall can be removed.

A heat exchanger and/or electric resistance heater may be provided to heat hot water within the storage tank. The heat exchanger may be the aforementioned exhaust or outgoing air heat exchanger.

In one embodiment, the hot water storage tank may be located in the lower portion of the receiving region.

In one embodiment, the ventilation system and the hot water storage tank are thermally connected within the building service element via a heat pump so that, if required, there can be a flow of heat from an exhaust air flow or from an outgoing air flow or from an outdoor air flow or a combination of these flows to the hot water storage tank.

Other domestic engineering components of the building service element may include fuses and switches for power or data lines. Further, domestic engineering components may include various sensors or measuring devices, such as measuring devices for power or heat consumption or temperature sensors.

Line, duct or cable sections may be pre-installed in the shaft region. However, it is also possible that lines such as power lines, signal lines, risers, sewage lines, etc. are only pulled on site through a vertical shaft formed by the shaft regions after vertical stacking of two or more building service elements. For this purpose, at least a part of the building service elements comprises connections for connecting the building service element to a pipe in the shaft region. These connections are preferably arranged in the shaft region or adjacent to the shaft region. Furthermore, these connections are preferably arranged stationary in the building service element. Starting from the building service element, lines leading to and from the domestic engineering components in the installed state are to lead into the residential units or building areas through core drillings in the outer wall. Insofar as the building service element has a rear wall in the region of the receiving region, this has regularly aligned apertures. For the purpose of laying these lines, at least part of the building service elements comprises corresponding connections for its connection to a line leading into the housing unit. These connections are preferably arranged in the rear area of the receiving region or on a possible rear wall. Furthermore, these connections are preferably arranged stationarily in the building service element. Insofar as such connections are present, they are preferably arranged in the uppermost region of the building service element, since in use of the building service elements it may be preferable to route the lines under the ceilings of the floors of the building.

The invention further relates to a system comprising a building service element according to the invention and at least one soffit element for insertion into a door or window opening in the outer wall of the building, wherein the soffit element has side panels corresponding to a respective edge of the door or window opening, wherein the side panels are backed with a heater acting thereon in a largesurface manner, wherein the heater is connected to a domestic engineering component of the building service element for the supply of energy.

The soffit element preferably has three or four side panels backed with a heater corresponding to the four edges, top, bottom, right and left, of the corresponding and typically rectangular door or window openings. In variants of the invention, however, it may be provided that either not all four side panels are backed with a heater, for example the floor and/or ceiling are not, or that the soffit element comprises only two or three side panels, for example for the side edges and possibly the floor or ceiling of the door or window opening. In a preferred embodiment, the system may include a building service element and two or more soffit elements. Typically, in the application of the system according to the invention, one building service element is used per residential unit or per building area, wherein the residential unit or the building area typically has more than one window or, in addition to the windows, a balcony door or escape door. For each of these windows and doors, a soffit element is preferably provided in the system according to the invention.

The heater is preferably a heating mat, the heating elements of which are designed as electrical resistance heaters. Alternatively, water-flow heating pipes are possible.

The building service element according to the invention can supply a flat or part of a building with building services, internet, telephone, electricity and other media in a decentralized, minimally invasive manner, over a short distance and without disturbing the tenant. By stacking the building service elements over the entire height of the facade, a vertical supply shaft is created that is accessible from the outside and allows for installation or supply per flat or per floor, even staggered over time. The buildings can thus be digitized retroactively, from the outside, or new connections can be laid without the individual tenant having to give his or her consent or being affected in his or her flat. If necessary, individual connections can then be connected and activated on an apartment-by-apartment basis. In addition to residential buildings, office buildings, other building uses and new buildings are also conceivable for the use of building service elements.

The building service element can be flexibly equipped with various components, so that different supply systems are made possible through appropriate combinations, which can be used depending on the framework conditions and objectives. In the following, some variants of different supply systems are shown by way of example.

One variant includes components for ventilation within the building service element, preferably in the form of an aeration and deaeration system with heat recovery, possibly a decentralised hot water tank, as well as conduits for house-central components. Heating is carried out centrally in the house via an air or brine heat pump or via district heating, wherein the corresponding components can be arranged in the basement, for example. Cooling is also carried out house-centrally via the aforementioned heat pump, wherein the cold is distributed at least with the aid of the ventilation system located in the building service element. Alternatively or in addition to a decentralised hot water tank in the building service element, a house-central hot water tank can also be provided, for example in the basement.

Another variant includes components within the building service element for operating electric heating soffits on windows and balcony doors as the sole or additional heating elements of a residential unit, as well as conduits for these and other house-central components. A ventilation system for operating an exhaust air system and cooling system is located in the flat and can include, in particular, an exhaust air heat pump with storage tank.

Another variant comprises components for ventilation within the building service element, preferably in the form of an aeration and deaeration system with heat recovery, an exhaust air heat pump with air heating via the ventilation system, possibly a buffer tank for the heater and a fresh water station, components for operating electric heating soffits on windows and balcony doors as the only or additional heating elements of a residential unit, a decentralised hot water tank, as well as conduits for house-central components. Heating is provided by the heat pump and/or the hot water tank. Cooling is done via the heat pump, distribution of cold via the ventilation system. Instead of the buffer tank and the fresh water station in the building service element, electric instantaneous water heaters can also be provided in the kitchen and bathroom.

Another variant, in contrast to the variant described above, provides for heating purely via the electric heating soffits on all windows and balcony doors of the flat. If necessary, active overflow heaters can be provided for interior bathrooms. Another variant provides for room-by-room aeration and deaeration systems with heat recovery integrated or attached to the windows for ventilation, as well as an exhaust air system for interior bathrooms if necessary. Heating is to be provided entirely electrically via the electric heating soffits on all windows and balcony doors of the flat. For hot water, there are electric instantaneous water heaters in the kitchen and bathroom; there is no cooling system. The conduits are located in the building service element.

Another variant, which can be realized using a building service element described below in the embodiment, comprises within the building service element an aeration and deaeration system for the flat with heat recovery, an outgoing air heat pump and a decentralised hot water tank for providing hot water to the flat, a device for cooling or heating air via the heat pump, wherein the tempered air can then be distributed to the flat, components for operating electric heating soffits on windows and balcony doors as additional heating elements of the flat, as well as conduits for the components described.

Further details and advantages of the invention will be apparent from the examples of embodiments described below with reference to the figures. Shown in the figures:

Figure 1 : a top view of the receiving region of a building service element according to the invention, in which various domestic engineering components are mounted;

Figure 2: a top view of the receiving region without the domestic engineering components mounted therein;

Figure 3: a horizontal section through the building service element mounted in front of an outer wall of a building; Figure 4: a vertical section through the building service element mounted in front of the outer wall of the building;

Figure 5: a horizontal section through a side edge of a window of the building provided with a soffit element of a system according to the invention;

Figure 6: a vertical section through the window; and

Figure 7: an illustration of a heating mat of such a soffit element.

Figures 1 to 4 show a building service element 100 according to the invention in several views.

The building service element 100 has a flat and rectangular casing 101 with vertical struts 102, which is made in a wooden frame construction and comprises a receiving region 120 with pre-assembled domestic engineering components and a shaft region 140 extending through the casing 101 from top to bottom. The depth of the building service element may be, for example, less than 50 cm and preferably less than 35 cm.

A full-surface access opening 103 is formed at the front of the building service element 100, which in other variants of the invention could also be subdivided into several smaller opening possibilities, through which both the receiving region 120 and the shaft region 140 are accessible. As can be seen in particular in Figure 3, the building service element 100 has two doors 104 for reversibly closing this access opening, each of which can be pivoted about a vertical axis, wherein one of the doors 104 in its closed state closes the part of the access opening 103 located in front of the receiving region 120 and the other door 104 in its closed state closes the part of the access opening 103 located in front of the shaft region 140. The doors can be opened by at least 90° or preferably by 180° or just under 180° to ensure the best possible accessibility. The doors 104 are full-surface insulated with a vacuum insulation panel 105 and are provided on the inside with a circumferential rubber seal, not shown in the Figure, which rests on the abutment surface of the casing 101 when closed. The internal air leakage rate should thus be kept to a value of <5%. The total thickness of the doors can be less than 10 cm.

The u-value of the entire building service element 100 should ideally be less than 0.15 W/m² without taking the outer building wall 200 into account.

The shaft region 140 is open at the top and bottom respectively the casing 101 has corresponding openings in the upper and lower frame elements. In the region of the receiving region 120, on the other hand, the casing 101 is closed at the top and bottom, wherein in the corresponding regions both the frame element forming the ceiling and the frame element forming the floor are insulated against fire in such a way that the building service elements 100 as a whole meet the requirements of fire resistance class F30.

The back of the casing 101 is open and sits directly against the existing wall of the building when the building service element 100 is installed. This leads to maximum utilization of the available space in the depth direction, which is limited due to the necessarily flat shape of the building service element.

To fasten the building service element 100 in front of the outer wall 200 of a building, the building service element 100 has, for example, three pairs of fastening elements not shown in the Figures, in the form of hooks open at the bottom, which are attached on both sides of the casing 101 at the same height, once at the top, once in the middle and once at the bottom of the casing 101. The fastening elements are attached to the sides of the frame elements forming the side walls of the casing 101 , so that no space is lost in the depth direction for fastening the building service element 100 to the outer wall 200. Rather, the building service element 100 is attached to mating contours arranged laterally of the building service element in front of the outer wall 200. In the receiving region 120 there are a number of crossbars 121 that are held on strips 122 or directly on the casing 101 . The domestic engineering components are attached to these crossbars 121 . The crossbars 121 can be flexibly inserted into the casing 101 and form a shelf system by means of which the available installation space can be optimally and flexibly used for different combinations of domestic engineering components.

The domestic engineering components can comprise the entire domestic services required to supply a residential unit. This includes heating, cooling, power supply, water supply, waste water disposal, aeration and deaeration of the residential unit, measurement of consumption, and the establishment of communication and data connections.

Specifically, a ventilation system 123 is provided for the aeration and deaeration of the residential unit. The ventilation system 123 comprises an outside and supply air duct 124 and an exhaust and outgoing air duct 125, which are thermally coupled to a cross- flow heat exchanger 126, which in other variants of the invention can also be replaced by another heat exchanger, for heat recovery. A bypass line to the outside and supply air duct 124, which is not shown in the Figure, can bypass the cross-flow heat exchanger 126 for winter operation.

The cross-flow heat exchanger 126 is preferably designed to achieve a heat recovery coefficient of >80% in operation. The power efficiency of the ventilation system 123 in operation shall preferably reach <0.4 Wh/m³.

On the outer side of the building service element 100, the ducts 124 and 125 terminate at a grilled ventilation opening 106 in the door 104 in front of the receiving region 120, which is provided with a circumferential rubber seal to prevent unwanted air exchange next to the ducts. On the inner side of the building service element 100, ducts 124 and 125 terminate at connectors not shown in the Figure, which are stationary mounted to the casing 101 .

The ventilation system 123 is arranged in the upper part of the receiving region 120 and the connections 135 on the inside of the ducts 124 and 125 are located under the ceiling of the casing 101. In this way, when the building service element 100 is in use, they can be connected directly to ducts that run into the residential unit through core holes in the outer wall of the building arranged under a storey ceiling.

In addition to the elements mentioned, the ventilation system 123 may further comprise control electronics, flaps, valves, fans, air filters, silencers, humidity sensors and/or C0₂-sensors. However, all of these elements are not shown in the Figures for reasons of clarity.

In one embodiment, the ventilation system 123 may be configured to control air flow rates via CCh-sensors and/or humidity sensors. Both the humidity and the CCh-content in the flat can thus be monitored and controlled.

A hot water tank 126 is arranged below the ventilation system 123 in the receiving region 120. In one embodiment, its capacity can be at least 120 to 160 litres in order to be able to cover all typical flat sizes in apartment buildings. Preferably, the hot water tank 126 meets the requirements of ErP class A with heat losses of <1 .5 W/K.

An electric heating register 128 allows heating of both the air flow in the outdoor and supply air duct 124 for winter operation and the water in the hot water tank 126 as required. Hot water can be supplied to the flat directly from the hot water tank or indirectly via a flat station with heat exchanger.

For energy optimization, however, the exhaust and outgoing air duct 125 of the ventilation system 123 and the hot water tank 126 are additionally coupled via a heat transfer circuit 129, whereby exhaust heat from the residential unit can be used to heat the water in the hot water tank. In one embodiment, the target for the effective performance of the heat transfer circuit 129 is a COP (Air7 - Water35) in the range of 3.5 to 4.5 respectively qs (ETAs) - EE-requirements in % low temperature 35°C of at least 140 %. The exhaust air heat source improves the COP compared to an outdoor air heat pump. Alternatively to the configuration shown, in another embodiment there may be heat pumps respectively heat exchanger circuits, one for heating water in the hot water tank 126 and a second for heating air in the outdoor and supply air duct 124. Some and possibly even all of the pipes, valves and ducts of the building service element 100 are preferably thermally insulated.

The domestic engineering components mentioned are preferably set so that their output is sufficient for a flat with 3-5 people respectively 60-100 m² of living space. With this output, most common flats or areas in apartment buildings or other buildings can be covered and supplied. This means that the prerequisites for standardization are fulfilled. In concrete terms, this means that the domestic engineering components mentioned are preferably designed for a nominal air flow rate according to DIN 1946- 6 of 60 to 100 m³/h, ventilation for moisture protection according to DIN 1946-6 of 30 to 50 m³/h, a heating load demand of 900 to 1 ,500 W/h respectively up to 20 W/m², and/or a domestic hot water energy demand of 200 to 300 W/h.

Further possible domestic engineering components, which in one embodiment may be installed in the building service element 100, include components of an electric auxiliary heating system, an electric frost protection system, temperature sensors on the inside and/or outside of the casing 101 , thermostats, silencers, as well as a control unit with, for example, interfaces for remote control and remote reading, consumption recording, control software for the domestic engineering components, and possibly a screen with information and control.

Close to the vertical wall 102, the hot water tank 126 comprises two connections 127 for connection to risers 141 respectively hot water pipes 142 leading into the living unit, which are routed through the shaft region 140 after the building service element 100 has been fixed in front of the outer wall 200.

In addition to the water pipes 141 , after the building service element 100 has been fixed in front of the outer wall 200, pipes for waste water, condensate, electricity and data, which are not shown in the Figures, are also routed through the shaft region 140.

In Figures 1 to 4, floors 201 and concrete ceilings 202 of the building can also be seen.

Figures 5 and 6 show a window opening 203 in the outer wall 200 of a building provided with a soffit element 300. The soffit element 300 has the shape of a rectangular frame and is composed of four side panels 301 , each covering one side of the window opening 203. It is inserted into the window opening 203 from the inside of the building. The depth of the side panels 301 is greater than the depth of the outer wall 200 or window opening 203, so that the side panels 301 also conceal a gap 220 between facade elements 400 arranged in front of the outer wall 200 and the outer wall 200 in relation to the window opening 203.

The side panels 301 of the soffit element 300 are backed on their side facing away from the window opening 203 with a heating mat 302 as shown in Figure 7, which have electrical heating elements 303 in the form of meandering resistance wires. Preferably, as shown in the Figures, all four side panels 301 are backed in this manner, but three or fewer side panels 301 may also be backed with heating elements in other variants of the invention. For the supply of electric current, these heating elements 303 are connected to a distributor in the building service element 100. Suitable heating mats have, for example, heating powers of between 200 and 500 W/m² respectively can be set to a maximum temperature of between 40°C and 60°C.

As with the building service element 100, the heating soffit element 300 can also be a prefabricated part which, together with the ventilation system 123 of the building service element, forms a system for temperature control of a residential unit. In particular, the soffit elements 300 should cover peak loads, while basic loads are preferably covered by the normally more energy-efficient ventilation system 123. They can be quickly and easily installed in the window opening 203 using, for example, plug in or snap-in connections.

The heated soffits are auxiliary heaters used to support and provide peak load coverage for the supply air heating via the ventilation system. While the air heating can preferably cover a basic load up to, for example, 18°C inside temperature, the heated soffits can individually supplement the heating requirement, for example in connection with room-by-room thermostats. In this way, differently warm rooms can be made possible, with recourse to pleasant radiant heat directly at the thermal weak point, the window.

After arranging the soffit elements 300 in the window openings 203, windows 204 and jalousies 205 are inserted into them, as can be seen in Figures 5 and 6.

Claims

1. A building service element for fastening in front of an outer wall of a building and, in particular, of an existing building, wherein the building service element has a casing which comprises at least one receiving region with preassembled domestic engineering components and a shaft region extending through the casing from top to bottom, wherein the receiving region and the shaft region are arranged next to each other, and wherein the building service element has on the front side a large-area or full-area access opening through which both the receiving region and the shaft region are accessible, and which is reversibly closed by one or more closure elements.

2. A building service element according to claim 1 , characterized in that the closure elements are one or more doors pivotable about a vertical axis or flaps pivotable about a horizontal axis, and/or in that a part of the access opening located in front of the receiving region is closed by a first closure element and a part of the access opening located in front of the shaft region is closed by a further closure element.

3. A building service element according to any one of the preceding claims, characterized in that the closure element or elements are thermally insulated, in particular have a vacuum insulation; and/or in that an airtight or at least windproof seal runs between the closure elements and the casing.

4. A building service element according to any one of the preceding claims, characterized in that the casing has a flat rectangular shape, wherein preferably the length of the shorter side of the casing is at least three times the depth thereof and/or the length of the longer side of the casing is at least five times the depth thereof.

5. A building service element according to any one of the preceding claims, characterized in that the shaft region is open upwards and downwards and the casing has corresponding passages in the floor and the ceiling, respectively.

6. A building service element according to any one of the preceding claims, characterized in that the receiving region is closed upwards and downwards and the floor and/or the ceiling in the region of the receiving region are fire- protection-insulated.

7. A building service element according to any one of the preceding claims, characterized in that the building service element comprises two shaft regions to the left and right of the receiving region.

8. A building service element according to any one of the preceding claims, characterized in that the rear side of the building service element is open at least area-wise, in particular in the region of the receiving region.

9. A building service element according to any one of the preceding claims, characterized in that the building service element has at least one pair of fastening elements arranged on the left and right of the casing, preferably laterally of the casing at the same height, in order to be able to fasten it in front of the outer wall of the building, wherein the fastening elements are preferably downwardly open suspension contours.

10. A building service element according to any one of the preceding claims, characterized in that the domestic engineering components are attached to vertical structural elements of the casing, wherein the building service element comprises, in particular, a shelf system with crossbars which can be flexibly inserted into the casing and to which the domestic engineering components are attached, wherein the crossbars are attached to the vertical structural elements of the casing.

11. A building service element according to any one of the preceding claims, characterized in that the domestic engineering components comprise an aeration and deaeration system, which preferably has a heat exchanger for heat recovery, or comprise an exhaust air system.

12. A building service element according to claim 11, characterized in that at least one closure element comprises a ventilation opening which is adapted, in particular in terms of position and size, to an associated air guide element of the aeration and deaeration system, wherein it is preferably provided that a sealing element is formed at the closure element or the aeration and deaeration system, which sealing element seals an interface between the ventilation opening and the associated air guide element when the closure element is closed.

13. A building service element according to claim 11 or 12, characterized in that the domestic engineering components further comprise a hot water storage tank, wherein it can be provided in particular that the aeration and deaeration system and the hot water storage tank are thermally connected via a heat pump, in particular an exhaust air and/or outgoing air heat pump.

14. A building service element according to any of the preceding claims, characterized in that the building service element comprises connections for connecting the building service element to a line running in the shaft region or leading into a residential unit of the building, which are preferably arranged in a stationary manner in the building service element.

15. A system comprising a building service element according to any one of the preceding claims and at least one soffit element for insertion into a door- or window-opening in the outer wall of the building, wherein the soffit element has side panels corresponding to a respective edge of the door- or window-opening, wherein the side panels are backed with a heater acting thereon in a largesurface manner, preferably with a heating mat, the heating elements of which are designed as electrical resistance heaters, wherein the heater is connected to a domestic engineering component of the building service element for the purpose of energy supply.