CA1095316A - Plenum chamber for ventilator - Google Patents
Plenum chamber for ventilatorInfo
- Publication number
- CA1095316A CA1095316A CA351,448A CA351448A CA1095316A CA 1095316 A CA1095316 A CA 1095316A CA 351448 A CA351448 A CA 351448A CA 1095316 A CA1095316 A CA 1095316A
- Authority
- CA
- Canada
- Prior art keywords
- container
- air
- plenum chamber
- ports
- open end
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/22—Means for preventing condensation or evacuating condensate
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F7/00—Ventilation
- F24F7/04—Ventilation with ducting systems, e.g. by double walls; with natural circulation
- F24F7/06—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Building Environments (AREA)
- Ventilation (AREA)
Abstract
PLENUM CHAMBER FOR VENTILATOR
Abstract of the Disclosure A plenum chamber for use with an air suction device such as a rotary turbine ventilator which is secured on the roof of a building to draw air when the disturbance of air on the turbine causes the actuation thereof. The plenum chamber is defined by a container having a bottom wall, a continuous side wall thereabout and defining a chamber open end. A circumferential flange is provided about the open end to secure the container in a hole provided in the roof of the building with the rotary turbine ventilator being secured over the flange about the open end. At least one port is formed in the side wall of the container to permit flow of air through the chamber when the rotary turbine ven-tilator is actuated. A conduit may be secured to the port and has an intake end which is located adjacent the ceiling of a room in the building whereby air will be drawn from the ceiling area and evacuated through the turbine. Condensate formed in the area of the fan will be collected in the bucket and eventually evaporate therefrom.
Abstract of the Disclosure A plenum chamber for use with an air suction device such as a rotary turbine ventilator which is secured on the roof of a building to draw air when the disturbance of air on the turbine causes the actuation thereof. The plenum chamber is defined by a container having a bottom wall, a continuous side wall thereabout and defining a chamber open end. A circumferential flange is provided about the open end to secure the container in a hole provided in the roof of the building with the rotary turbine ventilator being secured over the flange about the open end. At least one port is formed in the side wall of the container to permit flow of air through the chamber when the rotary turbine ven-tilator is actuated. A conduit may be secured to the port and has an intake end which is located adjacent the ceiling of a room in the building whereby air will be drawn from the ceiling area and evacuated through the turbine. Condensate formed in the area of the fan will be collected in the bucket and eventually evaporate therefrom.
Description
3~
BAC~GROUND OF INVENTION
(a) Field of the Inven-tion The present invention relates to a plenum chamber for use with a ven-tilation system to provide for multiple conduit connec-tion to an air suction device and to collect condensate from hot air collected in the ceiling areas of building structures and evacuated through the chamber.
(b) Description of Prior Ar-t It is known to use a rotary turbine ventila-tor or electric fan in the roof of a building struc-ture whereby -to extract hot moist air from these areas, The extraction of such hot air has various advantages, amongst which i-t facilitates the heating of the area defined by the space below the ceiling during cold ;
climatic periods and thereby conserving combustible energy, such as oil or electricity which is used to heat air. Another advantage is to provide for better distri-bution of cooled air during hot climatic periods. How-ever, a problem with such ventilators is that conden-sation forms in the area of the ventilator below the fan as the hot moist air is in contact with a cooler region, as the ventilator is in communication with the outside air, and this causes condensate to form and to 2S fall by gravity into the building space below the ven-tilator. This condensation is absorbed into the con-struction materials, such as the ceiling of a room below the ventilator and eventually seeps through the ceiling material causing considerable damageO
In the majority of systems u-ti]izing ventila-tors, it is usually required -to provide a ventilator fan D5~6 for each room whe~re it i5 clesired to evacuate air therefrom. Such s~stem is quite cos-tl~ because of the many ventilator fan devices required.
SUMMARY OF I~VENTION
It is a feature o~ the present invention -to subs~antially overcome all of the above-mentioned disadvantages of the prior art by the provision o~ a plenum chamber associated with a suction fan device and to which one or more conduits may be connected to evacuate warm moist air from adjacent the ceilings of one or more rooms and wherein condensate is collected in the plenum chamber.
A further feature of the present invention is -to provide a plenum chamber for use with a rotary L5 -turbine ven-tilator and wherein the chamber is com-prised of a container which is mounted within a hole in the roof of a building and in comrnunication with the ventilator~
It is another feature of the present inven--tion to provide an air convection system having a suc-tion fan device and a plenum chamber associated there-with and wherein the system is easy to install and economical to construct.
According to the above features, from a broad aspect, the present invention provides a plenum chamber for use with an air suction device~ The charnber is defined by a container having a bottom wall, a contin-uous side wall about the bottom wall and defining a chamber open end. ~ecurement means is provided for maintainirlg the open end in relative position to the suc-tion device. At leas-t one port is formed in the side 9S3~6 wall o the containex, intermediate the bottom wall and the open end, to permit flow of air through the chamber when the suction device is operative.
According to a further broad aspect of the present invention, there is provided an air convection system for a building structure. The system comprises an air suction device secured relative to a plenum chamber. The plenum chamher is defined by a con-tainer having a bottom wall, a continuous side wall about the bottom wall, and a chamber open end. Securement means is provided for maintaining the open end in relative position to the suction device. Two or more ports are provided in the side wall, intermediate the bottom wall and open end, with at least one conduit secured to one lS of the ports. The conduit has an intake end positioned in a ceiling of a room of the building. The suction device, when operative, causes air flow in the container through the ports whereby to effect a suction of air adjacent the ceiling so that some of the air will be evacuated through the suction device with moisture con~
: -:
densate collecting in the container.
:..
BRIEF DESCRIPTIO~ OF DRAWINGS
A preferred embodiment of the present invention will now be described with reference to the accompanying drawings, in which:-FIGURE 1 is a schematic illustration oE an air convection system utilizing the plenum chamber of the present invention FIGU~E 2 is a top view of the plenum chamber, and FIGURE 3 is a perspective view showing the con-? :~
~.~9S3~L~
.,.
struc-tion of the plenum chamber~
DESCRIPTIO~ OF PREFERRED EMBODIMENTS
Referring now to Figure 1, there is shown an air convection system for a building structure 10 and comprising a rotary turbine ventilator suction device 11 secured relative to a plenum chamber 12 of the pre~
sent invention. As hereinshown, the plenum chamber 12 is secured in a hole 13 made in the roof 14 of the building 10 and the turbine ventila-tor 11 is secured on the roof 14 over the plenum chamber 12.
me plenum chamber 12 will be described .in :
detail later with reference to Figures 2 and 3. As shown in Figure 1, the plenum chamber 12 is provided ~ ~
with a plurality of ports 15, a first one 15' being in i :.
. .
communication with air in the environment of ~he con-tainer. Conduits 16 and 17 connect to two other ports ; ;
provided in the container side wall and each have their intake ends 16' and 17' secured in a ceiling 18 and 19, ;~
respectively, of different rooms in the building 10. .
When the rotary turbine ventilator is actuated by the ~ ~
displacement of envlronmental air, a suction of air ~.
is made adjacent the ceilings 18 and 19 whereby to .~;
remove the hot air i.n that area, which air contains .;
the highest percentage of humidity. The extraction of this hot humid air facilitates heating the rooms as the overall low relative humidity of the air re-quires low heating rate thus resulting in a conserva-tion of energy.
Referring now additionally to Fi.gures 2 and 3, there is shown the construction of the plenum chamber ~::
120 A9 hereinshown, the chamber 12 is formed as a con-,.
. . ~
3~6 -tainer defining a bottom wall 20 wi.th a continuous side wall 21 extending thereabove~ The s.ide wall 21 is her~in defined as a downward inwardly taperirly cylinder having a -top open end 22. At least one port, herein three ports 23, are formed in the cylindrical side wall 21 spaced in-termediate the bot-tom wall 20 and the top open end 22. Coup:Ling means in -the form of cylindrical sleeves 24 extend outwardly of the side wall 21 and disposed a~out some or all of the ports 23 whereby a flexible pipe conduit, such as conduits 16 and 17, may be connected -to the ports for the convec-tion of air from remote areas. As shown in ~igure 2, the port 23' is not provided with a cylindrical sleeve
BAC~GROUND OF INVENTION
(a) Field of the Inven-tion The present invention relates to a plenum chamber for use with a ven-tilation system to provide for multiple conduit connec-tion to an air suction device and to collect condensate from hot air collected in the ceiling areas of building structures and evacuated through the chamber.
(b) Description of Prior Ar-t It is known to use a rotary turbine ventila-tor or electric fan in the roof of a building struc-ture whereby -to extract hot moist air from these areas, The extraction of such hot air has various advantages, amongst which i-t facilitates the heating of the area defined by the space below the ceiling during cold ;
climatic periods and thereby conserving combustible energy, such as oil or electricity which is used to heat air. Another advantage is to provide for better distri-bution of cooled air during hot climatic periods. How-ever, a problem with such ventilators is that conden-sation forms in the area of the ventilator below the fan as the hot moist air is in contact with a cooler region, as the ventilator is in communication with the outside air, and this causes condensate to form and to 2S fall by gravity into the building space below the ven-tilator. This condensation is absorbed into the con-struction materials, such as the ceiling of a room below the ventilator and eventually seeps through the ceiling material causing considerable damageO
In the majority of systems u-ti]izing ventila-tors, it is usually required -to provide a ventilator fan D5~6 for each room whe~re it i5 clesired to evacuate air therefrom. Such s~stem is quite cos-tl~ because of the many ventilator fan devices required.
SUMMARY OF I~VENTION
It is a feature o~ the present invention -to subs~antially overcome all of the above-mentioned disadvantages of the prior art by the provision o~ a plenum chamber associated with a suction fan device and to which one or more conduits may be connected to evacuate warm moist air from adjacent the ceilings of one or more rooms and wherein condensate is collected in the plenum chamber.
A further feature of the present invention is -to provide a plenum chamber for use with a rotary L5 -turbine ven-tilator and wherein the chamber is com-prised of a container which is mounted within a hole in the roof of a building and in comrnunication with the ventilator~
It is another feature of the present inven--tion to provide an air convection system having a suc-tion fan device and a plenum chamber associated there-with and wherein the system is easy to install and economical to construct.
According to the above features, from a broad aspect, the present invention provides a plenum chamber for use with an air suction device~ The charnber is defined by a container having a bottom wall, a contin-uous side wall about the bottom wall and defining a chamber open end. ~ecurement means is provided for maintainirlg the open end in relative position to the suc-tion device. At leas-t one port is formed in the side 9S3~6 wall o the containex, intermediate the bottom wall and the open end, to permit flow of air through the chamber when the suction device is operative.
According to a further broad aspect of the present invention, there is provided an air convection system for a building structure. The system comprises an air suction device secured relative to a plenum chamber. The plenum chamher is defined by a con-tainer having a bottom wall, a continuous side wall about the bottom wall, and a chamber open end. Securement means is provided for maintaining the open end in relative position to the suction device. Two or more ports are provided in the side wall, intermediate the bottom wall and open end, with at least one conduit secured to one lS of the ports. The conduit has an intake end positioned in a ceiling of a room of the building. The suction device, when operative, causes air flow in the container through the ports whereby to effect a suction of air adjacent the ceiling so that some of the air will be evacuated through the suction device with moisture con~
: -:
densate collecting in the container.
:..
BRIEF DESCRIPTIO~ OF DRAWINGS
A preferred embodiment of the present invention will now be described with reference to the accompanying drawings, in which:-FIGURE 1 is a schematic illustration oE an air convection system utilizing the plenum chamber of the present invention FIGU~E 2 is a top view of the plenum chamber, and FIGURE 3 is a perspective view showing the con-? :~
~.~9S3~L~
.,.
struc-tion of the plenum chamber~
DESCRIPTIO~ OF PREFERRED EMBODIMENTS
Referring now to Figure 1, there is shown an air convection system for a building structure 10 and comprising a rotary turbine ventilator suction device 11 secured relative to a plenum chamber 12 of the pre~
sent invention. As hereinshown, the plenum chamber 12 is secured in a hole 13 made in the roof 14 of the building 10 and the turbine ventila-tor 11 is secured on the roof 14 over the plenum chamber 12.
me plenum chamber 12 will be described .in :
detail later with reference to Figures 2 and 3. As shown in Figure 1, the plenum chamber 12 is provided ~ ~
with a plurality of ports 15, a first one 15' being in i :.
. .
communication with air in the environment of ~he con-tainer. Conduits 16 and 17 connect to two other ports ; ;
provided in the container side wall and each have their intake ends 16' and 17' secured in a ceiling 18 and 19, ;~
respectively, of different rooms in the building 10. .
When the rotary turbine ventilator is actuated by the ~ ~
displacement of envlronmental air, a suction of air ~.
is made adjacent the ceilings 18 and 19 whereby to .~;
remove the hot air i.n that area, which air contains .;
the highest percentage of humidity. The extraction of this hot humid air facilitates heating the rooms as the overall low relative humidity of the air re-quires low heating rate thus resulting in a conserva-tion of energy.
Referring now additionally to Fi.gures 2 and 3, there is shown the construction of the plenum chamber ~::
120 A9 hereinshown, the chamber 12 is formed as a con-,.
. . ~
3~6 -tainer defining a bottom wall 20 wi.th a continuous side wall 21 extending thereabove~ The s.ide wall 21 is her~in defined as a downward inwardly taperirly cylinder having a -top open end 22. At least one port, herein three ports 23, are formed in the cylindrical side wall 21 spaced in-termediate the bot-tom wall 20 and the top open end 22. Coup:Ling means in -the form of cylindrical sleeves 24 extend outwardly of the side wall 21 and disposed a~out some or all of the ports 23 whereby a flexible pipe conduit, such as conduits 16 and 17, may be connected -to the ports for the convec-tion of air from remote areas. As shown in ~igure 2, the port 23' is not provided with a cylindrical sleeve
2~ as it is not connected to any conduit whereby air in the area of the container 12 will be drawn thereinto.
In the event where ventilation is required only in the attic of a building structure, then the chamber 12 may be provided with a single openi.ng to admit environmental air from the attic therein.
In order to secure the container 12 to a ~:
suction device or to a wall or roof of a building, -there is provided a securement means in the form of a circumferential flange 25 disposed about the open end of the container. It is conceivable that the container could be secured directly to the ventilator 11. As hereinshown, the container is formed of a plastics material and the circumferential flange 25 is molded integrally -therewith. Seeing that the inside of the con-tainer is in communication with outside air throu~h the hole in the building structure and through the rotary turbine ventil.ator 11, as shown in Figure 1, the -- 6 ~
,, ,; . ., , ~ , . ..
~S3~L6 inner surface 26 of the side wall 21, is lined with a layer of thermal insulating rigid material 27. As shown in Figure 2, this material is formed of two semi- :
circular sections having a coupling joint 28 and it is S disposed in contact with the inner surface 26 of the side wall 21. The cylindrical sleeves 24 are provided with an inner circumferen-ti.al flange 29 at an end thereof for retaining the sleeves 24 in position over the inner surface of the insulating material 27. Al-ternatively, and as hereinshown, the sleeves 24 could -also be moulded with -the side wall 21 and the joint may be solidified by means of structural ribs 30. Struc~
tural ribs 31 may also be provided in the outer surface of the side wall 21 and extending to the flange 2S to add rigidity to the flange.
The inner area of the container i5 provided -with a plurality of division walls 32, herein two :
division walls, whereby to divide the inner area of the ;.
: container into separate compartments, one for each port ~ -.
23 Thus, the suction in the top open end 22 of the ~ -container would be divided between the chambers to assure a substantially equal suction force to each of the ports 23. A drain hole 33 may be provided in the ~:.
bottom wall 20 for connec-tion to a conduit (not shownj which would evacuate any condensate as it is deposited on the bottom wall 20. In order to communicate the ~ i. .
condensate from all of the compartments formed by the division walls 32, the bottom of the walls 32 may be spaced a small distance above the bottom wall 20. Al-ternatively, the walls 32 may extend to the bottom wall 20 but may be provided with one or more small openings :~ -- 7 ~
- .. .
~ . : . .,: ~ - ,
In the event where ventilation is required only in the attic of a building structure, then the chamber 12 may be provided with a single openi.ng to admit environmental air from the attic therein.
In order to secure the container 12 to a ~:
suction device or to a wall or roof of a building, -there is provided a securement means in the form of a circumferential flange 25 disposed about the open end of the container. It is conceivable that the container could be secured directly to the ventilator 11. As hereinshown, the container is formed of a plastics material and the circumferential flange 25 is molded integrally -therewith. Seeing that the inside of the con-tainer is in communication with outside air throu~h the hole in the building structure and through the rotary turbine ventil.ator 11, as shown in Figure 1, the -- 6 ~
,, ,; . ., , ~ , . ..
~S3~L6 inner surface 26 of the side wall 21, is lined with a layer of thermal insulating rigid material 27. As shown in Figure 2, this material is formed of two semi- :
circular sections having a coupling joint 28 and it is S disposed in contact with the inner surface 26 of the side wall 21. The cylindrical sleeves 24 are provided with an inner circumferen-ti.al flange 29 at an end thereof for retaining the sleeves 24 in position over the inner surface of the insulating material 27. Al-ternatively, and as hereinshown, the sleeves 24 could -also be moulded with -the side wall 21 and the joint may be solidified by means of structural ribs 30. Struc~
tural ribs 31 may also be provided in the outer surface of the side wall 21 and extending to the flange 2S to add rigidity to the flange.
The inner area of the container i5 provided -with a plurality of division walls 32, herein two :
division walls, whereby to divide the inner area of the ;.
: container into separate compartments, one for each port ~ -.
23 Thus, the suction in the top open end 22 of the ~ -container would be divided between the chambers to assure a substantially equal suction force to each of the ports 23. A drain hole 33 may be provided in the ~:.
bottom wall 20 for connec-tion to a conduit (not shownj which would evacuate any condensate as it is deposited on the bottom wall 20. In order to communicate the ~ i. .
condensate from all of the compartments formed by the division walls 32, the bottom of the walls 32 may be spaced a small distance above the bottom wall 20. Al-ternatively, the walls 32 may extend to the bottom wall 20 but may be provided with one or more small openings :~ -- 7 ~
- .. .
~ . : . .,: ~ - ,
3~
in ~he bo-ttom edge -thereof whereby condensa-te wil:l flow -to the drain hole 33. I-t is noted tha-t most oL
the condensate in the container 12 will evaporate -throu~h the turbine ven-tilator as usually only a small ~uantity of condensa-te will collect in the con-tainer.
Thus, when a drain hole 33 is provided, it may be plugged and utilized only in applications where eva-cuated air con-tinuously contains a high percentage of humidity~
Although as shown in Figure 1 the suction device is a gravity rotary turbine ventilator, other types of suc-tion devices may be provided, such as an electrically operated fan, whereby a continuous flow of air is evacuated from the ceiling area of rooms in a building structure. It is also pointed out that with wind actuated ven-tilators, the flow of air created in the convection conduits is a very gen-tle flow where-by excessive warmed air is not evacuated from ceiling areas of rooms to unnecessarily cause repea-ted operation of a heatin~ system. Further, the intake ends, such as 16' or 17' of the conduits may be provided with adjust- `
able grills whereby the size of the intake end opening may be controlled from a closed position to a fully . .
open position to regulate the flow of air to the intake ends, and particularly with electric fan suc-tion devices~
It is within the am~it of the present inven-tion to encompass any obvious modifications of the pre ferred embodiment described herein, provided such modi-fications fall within the scope of the appended claims.
in ~he bo-ttom edge -thereof whereby condensa-te wil:l flow -to the drain hole 33. I-t is noted tha-t most oL
the condensate in the container 12 will evaporate -throu~h the turbine ven-tilator as usually only a small ~uantity of condensa-te will collect in the con-tainer.
Thus, when a drain hole 33 is provided, it may be plugged and utilized only in applications where eva-cuated air con-tinuously contains a high percentage of humidity~
Although as shown in Figure 1 the suction device is a gravity rotary turbine ventilator, other types of suc-tion devices may be provided, such as an electrically operated fan, whereby a continuous flow of air is evacuated from the ceiling area of rooms in a building structure. It is also pointed out that with wind actuated ven-tilators, the flow of air created in the convection conduits is a very gen-tle flow where-by excessive warmed air is not evacuated from ceiling areas of rooms to unnecessarily cause repea-ted operation of a heatin~ system. Further, the intake ends, such as 16' or 17' of the conduits may be provided with adjust- `
able grills whereby the size of the intake end opening may be controlled from a closed position to a fully . .
open position to regulate the flow of air to the intake ends, and particularly with electric fan suc-tion devices~
It is within the am~it of the present inven-tion to encompass any obvious modifications of the pre ferred embodiment described herein, provided such modi-fications fall within the scope of the appended claims.
Claims (12)
1. A plenum chamber for use with an air suc-tion device, said chamber being defined by a container having a bottom wall, a continuous side wall about said bottom wall and defining a chamber open end, securement means for maintaining said open end in rela-tive position to said suction device, and at least one port in said side wall intermediate said bottom wall and said open end to permit flow of air through said chamber when said suction device is operative.
2. A plenum chamber as claimed in claim 1 wherein said securement means is a circumferential flange about said open end.
3. A plenum chamber as claimed in claim 2 wherein said container is formed of plastics material, said circumferential flange being formed integral with said container, and a plurality of structural ribs for reinforcing said flange.
4. A plenum chamber as claimed in claim 1 wherein there is provided two or more spaced-apart ports about said side wall, coupling means to secure a conduit to at least one of said ports.
5. A plenum chamber as claimed in claim 4 wherein said coupling means is a cylindrical sleeve extending outwardly of said side wall and disposed about a respective one of said ports, said conduit having a connectable end in which said sleeve is re-ceived to secure said conduit thereabout.
6. A plenum chamber as claimed in claim 1 wherein one or more division walls are disposed in said container to divide the inner area thereof into separate compartments, there being one of said ports associated with each said compartments.
7. A plenum chamber as claimed in claim 6 wherein a drain hole is provided in said bottom wall to provide for the removal of condensate from said container by conduit means connected to said drain hole, said division walls having a passage in their respec-tive bottom edge to communicate condensate on the bottom wall of all compartments with said drain hole.
8. A plenum chamber as claimed in claim 2 wherein said container is formed of plastics material, a layer of thermal insualting rigid material disposed over an inner surface of said container, said container being a cylindrical container having an inwardly taper-ing cylindrical side wall tapering towards said bottom wall.
9. A plenum chamber as claimed in claim 1 wherein said suction device is a gravity turbine ventilator operated by environmental air movement.
10. An air convection system for a building structure, said system comprising an air suction device secured relative to a plenum chamber, said plenum chamber being defined by a container having a bottom wall, a continuous side wall about said bottom wall and a chamber open end, securement means for maintaining said open end in relative position to said suction device, two or more ports in said side wall intermediate said bottom wall and said open end, at least one conduit secured to one of said ports and having an intake end positioned in a ceiling of a room of said building, said suction device when operative causing air flow in said container through said ports whereby to effect a suction of air adjacent said ceiling so that some of said air will be evacuated through said suction device with moisture condensate of said air collecting in said container.
11. A system as claimed in claim 10 wherein said suction device is a gravity turbine ventilator secured exteriorly of a roof over said building and operated by outside environmental air movement, said container having a circumferential flange about said open end and secured on a surface of said roof about a hole through which said container extends so that said container is located on the inside of said roof.
12. A system as claimed in claim 11 wherein there is at least three of said ports, one of said ports being in communication with air in the environ-ment of said container, a conduit connected to a res-pective one of said other two ports and each having an intake end positioned in a ceiling of a respective room in said building structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA351,448A CA1095316A (en) | 1980-05-07 | 1980-05-07 | Plenum chamber for ventilator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA351,448A CA1095316A (en) | 1980-05-07 | 1980-05-07 | Plenum chamber for ventilator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1095316A true CA1095316A (en) | 1981-02-10 |
Family
ID=4116883
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA351,448A Expired CA1095316A (en) | 1980-05-07 | 1980-05-07 | Plenum chamber for ventilator |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1095316A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4759272A (en) * | 1985-06-03 | 1988-07-26 | Michel Zaniewski | Ventilator |
| US4843786A (en) * | 1987-02-20 | 1989-07-04 | Walkinshaw Douglas S | Enclosure conditioned housing system |
-
1980
- 1980-05-07 CA CA351,448A patent/CA1095316A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4759272A (en) * | 1985-06-03 | 1988-07-26 | Michel Zaniewski | Ventilator |
| US4843786A (en) * | 1987-02-20 | 1989-07-04 | Walkinshaw Douglas S | Enclosure conditioned housing system |
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| JPH029259Y2 (en) |
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