CA1238541A - Exhaust venting apparatus - Google Patents
Exhaust venting apparatusInfo
- Publication number
- CA1238541A CA1238541A CA000467754A CA467754A CA1238541A CA 1238541 A CA1238541 A CA 1238541A CA 000467754 A CA000467754 A CA 000467754A CA 467754 A CA467754 A CA 467754A CA 1238541 A CA1238541 A CA 1238541A
- Authority
- CA
- Canada
- Prior art keywords
- conduit means
- exhaust
- gas flow
- exhaust gas
- flow conduit
- 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
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H8/00—Fluid heaters characterised by means for extracting latent heat from flue gases by means of condensation
- F24H8/006—Means for removing condensate from the heater
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J11/00—Devices for conducting smoke or fumes, e.g. flues
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Abstract
ABSTRACT
An extension, fitted to the wall outlet of a residential high-efficiency gas furnace producing exhaust gases of comparatively low temperatures, allows the exhaust gases to be vented over the roof of the residence while permitting the materials condensing out of the exhaust gases to drain therefrom.
An extension, fitted to the wall outlet of a residential high-efficiency gas furnace producing exhaust gases of comparatively low temperatures, allows the exhaust gases to be vented over the roof of the residence while permitting the materials condensing out of the exhaust gases to drain therefrom.
Description
5~L
BACKGROUND DISCUSSION
The new high-efficiency gas furnaces, which have been developed in response to the need for greater energy conservation, are up to 95% efficient in converting gas fuel to usable heat. Such furnaces make use of as many as three heat exchanger systems in order to maximize the recovery of heat. As a result, the exhaust gases which are finally vented to the outside of the building have a temperature in the range of 100F to ]40F, whereas exhaust gases from a conventional furnace have a temperature in the range of 450F to 500F. The production of exhaust gases having such low temperatures has permitted the installation of a relatively short vent pipe which discharges these gases through the outside building wall nearest to the furnace. The outlet of the vent pipe is in close proximity to the wall and is near the ground.
In cold weather, the water and other material in the vented exhaust gases condense out of the exhaust gases because the temperature difference between the warmer gases flowing out of the outlet and the colder surrounding air enables the heat of vaporization of the water and other materials to be removed. Since the exhaust gases are already relatively cool, a comparatively heavy precipitation can occur very quickly. Condensation is further facilitated by the presence of condensation nuclei, such as smoke particles. The condensates, which include corrosive substances and water, collect on the side of the building and damage the area of the wall around the furnace outlet. Deterioration is not limited to that caused by adverse chemical reactions, but includes damage which results from the physical effects of water freezing on the walls. Typically, the high-efficiency gas furnaces used in residential premises can produce the equivalent of 1 to 10 litres of liquid per day of operation.
$~
~1 ~3~S4~
A number of patents have been addressed to the minimization of condensate collection in exhaust systems.
Canadian Patent No. 646,486 relates to an air-cooled chimney which has a flue portion at its centre. A pair of vertical chambers, between the flue walls and the outer walls of the chimney, surrounds the flue. The furnace has a smoke pipe extending therefrom: a cooling jacket comprising a spaced, concentric tube has a number of apertures on the smoke pipe in order to cool the smoke pipe. Blowers are connected to the vertical chamber. As seen in E`igures 2 and 3 or the Patent, the inner conduit defining the flue extends upwardly for some distance above the top surfaces of the four outer walls of the chimney. This patent also discloses the use of a spray head for washing down the flue to prevent the accumulation of soot and other by-products from the combustion of fuel in the furnace. Figure 1 of the Patent illustrates the chimney venting the exhaust gases at a point above the roof of the adjacent building.
Canadian Patent No. 820,694 relates to a steel smoke stack and breeching construction built to eliminate the condensation which causes corrosion. The structure described largely eliminates condensate formation by insulating the inner surface of the stack from the outer surface with a dead air space provided by a hermetically sealed double wall structure. A rapid temperature drop in the hot exhaust gases is thereby prevented, and the gas flows rapidly out of the stack without leaving corrosive sulfurous condensate on the inner walls of the chimney.
Canadian Patent No. 1,113,816 relates to a heat recovery system wherein a suitable heat exchange system is placed at the top of a stack, chimney or flue so as to leave the entire column of gases below the heat exchanger at its original high temperatures. The disclosed system prevents a drop in the temperature of the chimney exhaust ~l~3~
gases which would cause condensibles in the exhaust to be trapped in the chimney.
Canadian Patent No. 1,150,927 relates to industrial chimneys adapted to discharge combustion products from furnaces into the atmosphere. A central flue is surrounded by another wall which leaves, between the column and the wall, an intermediate annular space. A
forced draught is caused in the central flue. Pressurized air flowing through the intermediate annular space flows centripetally through apertures in the flue walls to become mixed, at least in part, with the mass of gaseous products which rises within the central column. This mixture then flows at a high velocity through the nozzle.
The disclosure sets out that industrial chimneys should generally be built as high as is possible in order to minimize inconveniences and pollution.
The present invention, though simple to install and maintain, effectively prevents the deterioration of the outside walls of a building caused by the deposit of condensibles from the vented exhaust gases of a furnace.
Using the natural draught from the furnace to move the exhaust gases obviates the necessity for employing mechanical means such as fans to propel the gases forward, thus further contributing to the reliability of the invention.
Summary of the Invention The present invention allows the exhaust gases to be vented at a location over the roof of the building, rathex than at some point nearer the ground. Because the exhaust gases are vented at a location above the roof of the building, the outside walls of the building are not damaged by contact with condensate from the rising exhaust gases.
The present invention relates to an exhaust venting apparatus for use with a high-efficiency gas :
:; :
... ~ .
furnace located in a building, comprising: coupling means, adapted to connect with an exhaust outlet of the furnace, the outlet extending through an external wall of the building; exhaust gas flow conduit means proximate to the wall, one end of the exhaust gas flow conduit means being adapted to connect with the coupling means, the exhaust gas flow conduit means extending generally upwards from the coupling means such that the other end of the exhaust gas flow conduit means extends above the wall, the exhaust gas flow conduit means having an opening above the wall for venting above the wall gases exhausting through the outlet; and drainage conduit means, adapted to connect with the coupling means and to extend generally downwards from the coupling means, for allowing condensate from gases venting through the exhaust gas flow conduit means to flow therethrough.
Brief Description of Drawing Figure 1 depicts a front view of the invention in useO
Figure 2 depicts a side view of the invention in use.
Figure 3 depicts the components of a preferred embodiment of the invention.
Detailed Disclosure The preferred embodiment of the invention will now be described in detail.
As seen in Figures 1 and 2, the exhaust venting apparatus shown generally as 1 is connected to furnace outlet 2 and is held by brackets 3 to the side of building Exhaust venting apparatus 1 has four majorcomponents: lower exhaust pipe 10, coupling 20, cap 30, and upper exhaust pipe 40. These components are easily manufactured from standard hardware pieces and can be assembled into exhaust venting apparatus 1 in a relatively 3~
short time. These standard hardware components can be made from any suitable corrosion resistant materials, as an example, components made from ABS plastic are currently available in appropriate dimensions and are relatively inexpensive. The components are depicted in greater detail in Figure 3.
~ ower exhaust pipe 10 i~ ~ cylindrical pipe havin~ a diameter of three lnches and length of about eight inches. Th~ee holes 12 o~ 7/16 inches dia~eter are drilled one inch apart, beginning at three inches from that end of lower exhaust pipe 10 which will be fitted to coupling 20. On the same end of lower exhaust pipe 10, but on the opposite side of holes 12, semi~elliptical hole 16 i6 formed with a diameter Q~ about
BACKGROUND DISCUSSION
The new high-efficiency gas furnaces, which have been developed in response to the need for greater energy conservation, are up to 95% efficient in converting gas fuel to usable heat. Such furnaces make use of as many as three heat exchanger systems in order to maximize the recovery of heat. As a result, the exhaust gases which are finally vented to the outside of the building have a temperature in the range of 100F to ]40F, whereas exhaust gases from a conventional furnace have a temperature in the range of 450F to 500F. The production of exhaust gases having such low temperatures has permitted the installation of a relatively short vent pipe which discharges these gases through the outside building wall nearest to the furnace. The outlet of the vent pipe is in close proximity to the wall and is near the ground.
In cold weather, the water and other material in the vented exhaust gases condense out of the exhaust gases because the temperature difference between the warmer gases flowing out of the outlet and the colder surrounding air enables the heat of vaporization of the water and other materials to be removed. Since the exhaust gases are already relatively cool, a comparatively heavy precipitation can occur very quickly. Condensation is further facilitated by the presence of condensation nuclei, such as smoke particles. The condensates, which include corrosive substances and water, collect on the side of the building and damage the area of the wall around the furnace outlet. Deterioration is not limited to that caused by adverse chemical reactions, but includes damage which results from the physical effects of water freezing on the walls. Typically, the high-efficiency gas furnaces used in residential premises can produce the equivalent of 1 to 10 litres of liquid per day of operation.
$~
~1 ~3~S4~
A number of patents have been addressed to the minimization of condensate collection in exhaust systems.
Canadian Patent No. 646,486 relates to an air-cooled chimney which has a flue portion at its centre. A pair of vertical chambers, between the flue walls and the outer walls of the chimney, surrounds the flue. The furnace has a smoke pipe extending therefrom: a cooling jacket comprising a spaced, concentric tube has a number of apertures on the smoke pipe in order to cool the smoke pipe. Blowers are connected to the vertical chamber. As seen in E`igures 2 and 3 or the Patent, the inner conduit defining the flue extends upwardly for some distance above the top surfaces of the four outer walls of the chimney. This patent also discloses the use of a spray head for washing down the flue to prevent the accumulation of soot and other by-products from the combustion of fuel in the furnace. Figure 1 of the Patent illustrates the chimney venting the exhaust gases at a point above the roof of the adjacent building.
Canadian Patent No. 820,694 relates to a steel smoke stack and breeching construction built to eliminate the condensation which causes corrosion. The structure described largely eliminates condensate formation by insulating the inner surface of the stack from the outer surface with a dead air space provided by a hermetically sealed double wall structure. A rapid temperature drop in the hot exhaust gases is thereby prevented, and the gas flows rapidly out of the stack without leaving corrosive sulfurous condensate on the inner walls of the chimney.
Canadian Patent No. 1,113,816 relates to a heat recovery system wherein a suitable heat exchange system is placed at the top of a stack, chimney or flue so as to leave the entire column of gases below the heat exchanger at its original high temperatures. The disclosed system prevents a drop in the temperature of the chimney exhaust ~l~3~
gases which would cause condensibles in the exhaust to be trapped in the chimney.
Canadian Patent No. 1,150,927 relates to industrial chimneys adapted to discharge combustion products from furnaces into the atmosphere. A central flue is surrounded by another wall which leaves, between the column and the wall, an intermediate annular space. A
forced draught is caused in the central flue. Pressurized air flowing through the intermediate annular space flows centripetally through apertures in the flue walls to become mixed, at least in part, with the mass of gaseous products which rises within the central column. This mixture then flows at a high velocity through the nozzle.
The disclosure sets out that industrial chimneys should generally be built as high as is possible in order to minimize inconveniences and pollution.
The present invention, though simple to install and maintain, effectively prevents the deterioration of the outside walls of a building caused by the deposit of condensibles from the vented exhaust gases of a furnace.
Using the natural draught from the furnace to move the exhaust gases obviates the necessity for employing mechanical means such as fans to propel the gases forward, thus further contributing to the reliability of the invention.
Summary of the Invention The present invention allows the exhaust gases to be vented at a location over the roof of the building, rathex than at some point nearer the ground. Because the exhaust gases are vented at a location above the roof of the building, the outside walls of the building are not damaged by contact with condensate from the rising exhaust gases.
The present invention relates to an exhaust venting apparatus for use with a high-efficiency gas :
:; :
... ~ .
furnace located in a building, comprising: coupling means, adapted to connect with an exhaust outlet of the furnace, the outlet extending through an external wall of the building; exhaust gas flow conduit means proximate to the wall, one end of the exhaust gas flow conduit means being adapted to connect with the coupling means, the exhaust gas flow conduit means extending generally upwards from the coupling means such that the other end of the exhaust gas flow conduit means extends above the wall, the exhaust gas flow conduit means having an opening above the wall for venting above the wall gases exhausting through the outlet; and drainage conduit means, adapted to connect with the coupling means and to extend generally downwards from the coupling means, for allowing condensate from gases venting through the exhaust gas flow conduit means to flow therethrough.
Brief Description of Drawing Figure 1 depicts a front view of the invention in useO
Figure 2 depicts a side view of the invention in use.
Figure 3 depicts the components of a preferred embodiment of the invention.
Detailed Disclosure The preferred embodiment of the invention will now be described in detail.
As seen in Figures 1 and 2, the exhaust venting apparatus shown generally as 1 is connected to furnace outlet 2 and is held by brackets 3 to the side of building Exhaust venting apparatus 1 has four majorcomponents: lower exhaust pipe 10, coupling 20, cap 30, and upper exhaust pipe 40. These components are easily manufactured from standard hardware pieces and can be assembled into exhaust venting apparatus 1 in a relatively 3~
short time. These standard hardware components can be made from any suitable corrosion resistant materials, as an example, components made from ABS plastic are currently available in appropriate dimensions and are relatively inexpensive. The components are depicted in greater detail in Figure 3.
~ ower exhaust pipe 10 i~ ~ cylindrical pipe havin~ a diameter of three lnches and length of about eight inches. Th~ee holes 12 o~ 7/16 inches dia~eter are drilled one inch apart, beginning at three inches from that end of lower exhaust pipe 10 which will be fitted to coupling 20. On the same end of lower exhaust pipe 10, but on the opposite side of holes 12, semi~elliptical hole 16 i6 formed with a diameter Q~ about
2 1/2 inches and a height o~ about 1 1/2 inches. Three screw holes 14 are drilled equidistantly around the circumference of lower exhaust pipe 10 at the same end of lower exhaust pipe 10 as holes 12 and 16. Finally, two 6crew holes 18 and 19 are drilled at the other end of lower exhaust pipe 10.
2Q Coupling 20 is a cylindrical section having a diameter of three inches and a length of approximately three inches. Three screw holes 22 and three screw holes 24, each hole having a diameter of 3/32 inches, are drilled equidistantly around the circumference of coupling 2 r 20 at each end thereof. At one end of coupling 20, semi-elliptical hole 26 iB formed with a diameter of about 2 1/2 inches and a height of about 1 1/2 inches.
Cap 30 i9 a cylindrical section having a diameter lightly greater than that of lower exhaust pipe 10 and a length of approximately three inches. Cap 30 has drilled at the bottom thereof nine holes 32, each having a diameter of 3/16 inches. Bottom holes 32 allow the condensate from the exhaust gases to drain onto ground 5 or into a container (not shown) below cap 30. Two screw holes 34 and 35 are also formed in the side of cap 30 near the top thereof, 80 as to enable cap 30 to be attached ~o lower exhaust pipe 10 by screws 36 and 37. The use of screws 36 and 37 allows cap 30 to be removed from lower ~;
exhaust pipe 10 and cleaned of condensate that has accumulated therein.
Upper exhaust pipe 40 is a cylindrical pipe having a diameter of ~hree inches and a length sufficient to clear the roof of the building to which exhaust venting apparatus 1 is attached. Three screw holes 42 of 7/16 inches diameter are drilled equidistantly around the circumference of upper exhaust pipe 40 at that end of upper exhaust pipe 40 which will be fitted to coupling 20. Upper exhaust pipe 40 can itself consist of a number of sections of pipe and couplings, which are fitted together until upper exhaust pipe 40 extends above the roof of adjacent building 4. Figures 1 and 2 illustrate a portion of upper exhaust pipe 40 comprising pipe section 43, coupling 44, and pipe section 45.
Exhaust venting apparatus 1 is installed by attaching upper exhaust pipe 40 to wall bracket 3.
Coupling 20 can then be attached to upper exhaust pipe 40 by means of screws 50 inserted through screw holes 22 of coupling 20 and screw holes 42 of upper exhaust pipe 40.
Lower exhaust pipe 10 is then attached to coupling 20 by means of screws 51 inserted through screw holes 24 of coupling 20 and screw holes 14 of lower exhaust pipe 10.
Hole 16 of lower exhaust pipe 10 and hole 26 of coupling 20 now form an approximately elliptical hole through which furnace outlet 2 extends into coupling 20 and lower exhaust pipe 10. Finally, cap 30 is attached to lower exhaust pipe 10 by inserting screws 36 and 37 into screw holes 34 and 35 of cap 30 and screw holes 18 and 19 of lower exhaust pipe 10.
In use, the exhaust gases from furnace outlet 2 pass through coupling 20 to upper exhaust pipe 40. Being hotter and lighter than the surrounding atmosphere, the exhaust gases rise to the top of upper exhaust pipe 40 and are there vented. The exhaust gases cool as they rise, ~L23~S~.
causing water and other materials to condense along the side of coupling 20 and upper exhaust pipe 40. This condensate descends the sides of coupling 20 and upper exhaust pipe 40 to lower exhaust pipe 10 and cap 30~ The condensate can drain from cap 30 through bottom holes 32, Periodically, cap 30 can be removed for a thorough cleaning of bottom holes 32. Holes 12 in lower exhaust pipe 10 permit the drainage of condensate in the event that bottom holes 32 become blocked.
It is seen that this invention, although simple to construct and maintain, effectively stops the deposit of condensate on the walls of the buildings and thus prevents damage to the outside of the wall. The in~ention has been successfully used in outdoor temperatures as low as -30F. Installation of the invention causes little or no back pressure to develop in the furnace.
The embodiment described is an example of the present invention. The invention is not limited to this example, and there are other possible forms of construction within the scope of the invention.
2Q Coupling 20 is a cylindrical section having a diameter of three inches and a length of approximately three inches. Three screw holes 22 and three screw holes 24, each hole having a diameter of 3/32 inches, are drilled equidistantly around the circumference of coupling 2 r 20 at each end thereof. At one end of coupling 20, semi-elliptical hole 26 iB formed with a diameter of about 2 1/2 inches and a height of about 1 1/2 inches.
Cap 30 i9 a cylindrical section having a diameter lightly greater than that of lower exhaust pipe 10 and a length of approximately three inches. Cap 30 has drilled at the bottom thereof nine holes 32, each having a diameter of 3/16 inches. Bottom holes 32 allow the condensate from the exhaust gases to drain onto ground 5 or into a container (not shown) below cap 30. Two screw holes 34 and 35 are also formed in the side of cap 30 near the top thereof, 80 as to enable cap 30 to be attached ~o lower exhaust pipe 10 by screws 36 and 37. The use of screws 36 and 37 allows cap 30 to be removed from lower ~;
exhaust pipe 10 and cleaned of condensate that has accumulated therein.
Upper exhaust pipe 40 is a cylindrical pipe having a diameter of ~hree inches and a length sufficient to clear the roof of the building to which exhaust venting apparatus 1 is attached. Three screw holes 42 of 7/16 inches diameter are drilled equidistantly around the circumference of upper exhaust pipe 40 at that end of upper exhaust pipe 40 which will be fitted to coupling 20. Upper exhaust pipe 40 can itself consist of a number of sections of pipe and couplings, which are fitted together until upper exhaust pipe 40 extends above the roof of adjacent building 4. Figures 1 and 2 illustrate a portion of upper exhaust pipe 40 comprising pipe section 43, coupling 44, and pipe section 45.
Exhaust venting apparatus 1 is installed by attaching upper exhaust pipe 40 to wall bracket 3.
Coupling 20 can then be attached to upper exhaust pipe 40 by means of screws 50 inserted through screw holes 22 of coupling 20 and screw holes 42 of upper exhaust pipe 40.
Lower exhaust pipe 10 is then attached to coupling 20 by means of screws 51 inserted through screw holes 24 of coupling 20 and screw holes 14 of lower exhaust pipe 10.
Hole 16 of lower exhaust pipe 10 and hole 26 of coupling 20 now form an approximately elliptical hole through which furnace outlet 2 extends into coupling 20 and lower exhaust pipe 10. Finally, cap 30 is attached to lower exhaust pipe 10 by inserting screws 36 and 37 into screw holes 34 and 35 of cap 30 and screw holes 18 and 19 of lower exhaust pipe 10.
In use, the exhaust gases from furnace outlet 2 pass through coupling 20 to upper exhaust pipe 40. Being hotter and lighter than the surrounding atmosphere, the exhaust gases rise to the top of upper exhaust pipe 40 and are there vented. The exhaust gases cool as they rise, ~L23~S~.
causing water and other materials to condense along the side of coupling 20 and upper exhaust pipe 40. This condensate descends the sides of coupling 20 and upper exhaust pipe 40 to lower exhaust pipe 10 and cap 30~ The condensate can drain from cap 30 through bottom holes 32, Periodically, cap 30 can be removed for a thorough cleaning of bottom holes 32. Holes 12 in lower exhaust pipe 10 permit the drainage of condensate in the event that bottom holes 32 become blocked.
It is seen that this invention, although simple to construct and maintain, effectively stops the deposit of condensate on the walls of the buildings and thus prevents damage to the outside of the wall. The in~ention has been successfully used in outdoor temperatures as low as -30F. Installation of the invention causes little or no back pressure to develop in the furnace.
The embodiment described is an example of the present invention. The invention is not limited to this example, and there are other possible forms of construction within the scope of the invention.
Claims (3)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS.
1. An exhaust venting apparatus for use with a high-efficiency gas furnace located in a building comprising:
coupling means, adapted to connect with an exhaust outlet of said furnace, said outlet extending through an external wall of said building;
exhaust gas flow conduit means proximate to said wall, one end of said exhaust gas flow conduit means being adapted to connect with said coupling means, said exhaust gas flow conduit means extending generally upwards from said coupling means such that the other end of said exhaust gas flow conduit means extends above said wall, said exhaust gas flow conduit means having an opening above said wall for venting above said wall gases exhausting through said outlet;
and drainage conduit means, adapted to connect with said coupling means and to extend generally downwards from said coupling means, for allowing condensate from gases venting through said exhaust gas flow conduit means to flow down-wardly therethrough, wherein said drainage conduit means comprises a lower exhaust pipe of a cylindrical shape provided with a cap fitted on the end of said lower exhaust pipe, said cap being of cylindrical cross-section having a diameter slightly greater than a diameter of said lower exhaust pipe, said cap having bottom holes allowing the condensate from exhaust gases to drain down to be collected.
coupling means, adapted to connect with an exhaust outlet of said furnace, said outlet extending through an external wall of said building;
exhaust gas flow conduit means proximate to said wall, one end of said exhaust gas flow conduit means being adapted to connect with said coupling means, said exhaust gas flow conduit means extending generally upwards from said coupling means such that the other end of said exhaust gas flow conduit means extends above said wall, said exhaust gas flow conduit means having an opening above said wall for venting above said wall gases exhausting through said outlet;
and drainage conduit means, adapted to connect with said coupling means and to extend generally downwards from said coupling means, for allowing condensate from gases venting through said exhaust gas flow conduit means to flow down-wardly therethrough, wherein said drainage conduit means comprises a lower exhaust pipe of a cylindrical shape provided with a cap fitted on the end of said lower exhaust pipe, said cap being of cylindrical cross-section having a diameter slightly greater than a diameter of said lower exhaust pipe, said cap having bottom holes allowing the condensate from exhaust gases to drain down to be collected.
2. An apparatus according to claim 1 wherein said cap is removable.
3. An apparatus according to claim 1 wherein said coupling means, exhaust gas flow conduit means and drainage conduit means are formed of corrosion resistant material such as plastic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000467754A CA1238541A (en) | 1984-11-14 | 1984-11-14 | Exhaust venting apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000467754A CA1238541A (en) | 1984-11-14 | 1984-11-14 | Exhaust venting apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1238541A true CA1238541A (en) | 1988-06-28 |
Family
ID=4129140
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000467754A Expired CA1238541A (en) | 1984-11-14 | 1984-11-14 | Exhaust venting apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1238541A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6053162A (en) * | 1998-10-30 | 2000-04-25 | Newmac Mfg. Inc. | Balanced flue sealed vent terminal assembly |
-
1984
- 1984-11-14 CA CA000467754A patent/CA1238541A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6053162A (en) * | 1998-10-30 | 2000-04-25 | Newmac Mfg. Inc. | Balanced flue sealed vent terminal assembly |
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| Date | Code | Title | Description |
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| MKEX | Expiry |