CA1239314A - Gas log fireplace heat exchanger - Google Patents
Gas log fireplace heat exchangerInfo
- Publication number
- CA1239314A CA1239314A CA000552805A CA552805A CA1239314A CA 1239314 A CA1239314 A CA 1239314A CA 000552805 A CA000552805 A CA 000552805A CA 552805 A CA552805 A CA 552805A CA 1239314 A CA1239314 A CA 1239314A
- Authority
- CA
- Canada
- Prior art keywords
- gas
- fireplace
- air
- heat exchanger
- flame
- 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
- F24B—DOMESTIC STOVES OR RANGES FOR SOLID FUELS; IMPLEMENTS FOR USE IN CONNECTION WITH STOVES OR RANGES
- F24B1/00—Stoves or ranges
- F24B1/18—Stoves with open fires, e.g. fireplaces
- F24B1/1808—Simulated fireplaces
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Gas Burners (AREA)
Abstract
GAS LOG FIREPLACE HEAT EXCHANGER
ABSTRACT OF THE DISCLOSURE
A gas fueled heat exchange machine consists of a fan-driven, air fed, sealed chamber manifold resting flush on the base of a fireplace and centered square to its back wall. A series of cylindrical thick-walled ceramic tubes act as heated air conduits which are inset with heat-resistant cement both in the rear manifold and in the extended forward ends of the front body wall at the fireplace opening. Desirably the sealed air chamber is rectangular and has horizontal fixed louvered fins across its lower front to allow room-temperature air to be drawn upward from the cooler floor level into the fireplace, then forced through the lint-filtered sealed chamber and manifold and heated ceramic conduits, returning the warmed air to the room by vertical-slated louvers which divert the air flow to ascend at wide angles from the machine. The forced air cycle is provided by an electric transflow blower which is heat protected inside the sealed cham-ber at the internal base of the manifold. On the top surface of the sealed chamber, there is a horizontal U-shaped gas burner with a controllable primary air inlet on the underside thereof, together with side vents on both ends of the machine's walls to provide secondary combustion air supply. The hollow gas burner has a plurality of apertures on its top, spaced apart and in varying sizes, forming a consistent design which governs the height of the gas flame in a regulated undulating pattern.
ABSTRACT OF THE DISCLOSURE
A gas fueled heat exchange machine consists of a fan-driven, air fed, sealed chamber manifold resting flush on the base of a fireplace and centered square to its back wall. A series of cylindrical thick-walled ceramic tubes act as heated air conduits which are inset with heat-resistant cement both in the rear manifold and in the extended forward ends of the front body wall at the fireplace opening. Desirably the sealed air chamber is rectangular and has horizontal fixed louvered fins across its lower front to allow room-temperature air to be drawn upward from the cooler floor level into the fireplace, then forced through the lint-filtered sealed chamber and manifold and heated ceramic conduits, returning the warmed air to the room by vertical-slated louvers which divert the air flow to ascend at wide angles from the machine. The forced air cycle is provided by an electric transflow blower which is heat protected inside the sealed cham-ber at the internal base of the manifold. On the top surface of the sealed chamber, there is a horizontal U-shaped gas burner with a controllable primary air inlet on the underside thereof, together with side vents on both ends of the machine's walls to provide secondary combustion air supply. The hollow gas burner has a plurality of apertures on its top, spaced apart and in varying sizes, forming a consistent design which governs the height of the gas flame in a regulated undulating pattern.
Description
123~133L4 The invention relates to a gas fueled fireplace insert which employs an electric transflow blower within a sealed chamber to return hot air into the room through gas heated ceramic tubes from within a home fireplace.
The disadvantages of inefficient wood burning fireplaces in-elude having to obtain, chop and store wood, dispose of ashes, clean the chimney, and live with the resulting air pollution.
These disadvantages have led to an on-going effort to apt proximate the coziness and appearance of a live fire through simulated gas flames produced by gas log fireplace sets. The drawback of conventional gas log fireplace sets, as with solid fuel fireplaces, is that over 85 percent of their generated heat is lost through the chimney vent. Therefore, a machine which produces a realistic looking gas flame while capturing and air-quilting the potential heat energy loss into the home is desirable.
There have been many attempts to develop such a machine for use with solid burning fuels using blower fans and metal conduit pipes, but none employing gaseous fuels using an engineered bun-nor to provide regulated flames to pass heat through ceramic conduits.
These prior attempts all lack one or more important kirk-teristics which this invention has; such as, a proper lint filter to prevent recirculation of undesirable dusty air, simplicity and economy of design, efficiency of heat transfer through durable ceramic tubes rather than short-life metal conduits, adaptability to most sizes of fireplaces, attractive appearance, portability with convertibility to outdoor or indoor cooking use and a U-shaped gas burner engineered to provide a controlled double-depth dimensional flame for realistic viewing and heating comfort.
Using metal pipes as heat conduits creates the danger of burnout which results in poisonous monoxides being circulated into the house. The present invention overcomes this problem by using ceramic tubes as heat conduits which tubes can retain a greater temperature over a longer period of time. The invention can be converted from natural gas to propane and vise versa. The invention is designed to allow for the use of a fireplace screen or glass doors to enhance the decorative appearance of the fireplace. The invention includes a variable speed blower con-trot and gas valve control so that the desired amount of heat r,, 1:~393~4 and/or flame can be produced. The apertures on the gas burner are sized and spaced so as to produce a realistic double-depth dimensional flame with varying height. The invention can be used as an alternative for heating, lighting and cooking in the event of electrical failure. The invention is portable and can be used as a cook stove outdoors as well as indoors. The cost of using natural gas or using propane with the invention is almost equal because natural gas has 1 1/2 times less heating value and is burnt at 3 times less inch water column pressure than propane which results in lower British Thermal Unit input balances.
The present invention provides a heat exchanger of rugged construction with its 121 cubic feet per minute electrical blower protected against heat inside a lint free sealed chamber. Its valve and fan controls are easily accessible yet discretely hidden by a piano-hinged door outside and below the level of intense heat. A plurality of lifetime sealed ceramic tubes tested to at-low for heat expansion and cooling contraction with natural, butane, and propane gases divert the heated air at wide angles.
The horizontal U-shaped gas burner with a controllable primary air inlet has a plurality of varying-sized apertures spaced apart to form a consistent design which governs the height and color of the gas flame in a regulated undulating pattern under and around the ceramic tubes. The two decorative ceramic logs are bolted into position to allow the realistic drafted flame to ascend in front of the logs toward the chimney vent. There may be other twig-shaped ceramic logs resting on the bolted logs for aesthetic purposes. A standing pilot burner provides instant flame iguana-lion and because of the aperture spacing there is no pouf-pouf flashback.
In the drawings:
igure 1 is a partly broken away perspective view of a gas log fireplace heat exchanger machine in accordance with the present invention.
igure 2 is an illustration showing a side view of the machine of Figure 1 within a fireplace.
igure 3 is a partial schematic frontal view showing the embodiment of flame pattern produced by the machine of Figure 1.
:~235~3~
igure d is a sea tonal view of the ceramic tube placements.
igure 5 is a top perspective view of the gas burner showing the spacing and sizing of the apertures.
igure 6 is a top perspective of the decorative gas log placement.
igure 7 is a frontal view of the louvered inlet filter vent.
igure 8 is a Errantly view of the louvered wide-angled exit vent.
igure 9 is an end view of the gas valve and fan control positions.
Figure 1 shows a gas log fireplace heat exchanger machine which is rectangular in shape with dimensions of 14 3/4" in depth, I 3/4" in width, and 9 1/4" in height. The machine's air inlet on its front wall faces inside a room within a fireplace 38 as shown in Figure 2. The air is pulled by a squirrel-caged air blower 26 through downward-sloped horizontal louvers as shown in Figure 4 to draw the coolest air inward from the lower hearth or floor level. The air as shown in Figure 1 is drawn through a filter screen 23 to ensure its lint free return, passed into a sealed chamber 8 to be force blown through the manifold 39 whose outside back lays parallel to the rear of the fireplace 38 wall.
Thick walled ceramic tubes 12 are inset into the manifold 39 and extend at right angles forward to the front body wall of the machine shown in figure 1. The foot long tubes 12 are sealed in position with thermal cement which, like the ceramics themselves, maintains its flexural strength while allowing for heating expand soon and cooling contraction. The air passes through the hollow center 40 of the ceramic tubes 12 which are heated from gas flames 41 below and on either side of their cylindrical shape as is shown in Figure 3. On emerging, the air which is heated up to 175 F is diverted by vertical louvers 24 to ascend into the room area at right and left angles from the machine in figure 1.
The air blower 26 is thermally insulated, being inside a 1/8" steel-walled sealed chamber 8 and below the gas burner 15 as shown enlarged in Figure 5, and is designed two shut off should excessive motor temperature develop (over 40 C or 104F). The air blower 26 is capable of moving 121 cubic f cot of air per minute and can recycle the cubic capacity of a 10'x 20' room every f fifteen minutes.
lZ393~4 The gas burner 15 is U-shaped and rests horizontally lengthwise on the top surf ace of the machine 1 as is shown in Figure 5. The apertures on the gas burner's 15 upper side are purposely spaced with 5/16" centers and in a precise pattern of 22 large #42 drill holes (.0935~ and 72 smaller #56 drill holes (.0465). By adjusting the primary air shutter 18, the gas flames 41 as shown in figure 3 can be adjusted in height and color.
Desirably the perfect flame 41 would allow a 1/2" of air space between its tip underneath the ceramic tubes 12. The location of the larger #42 drill holes are interspaced between the ceramic tubes 12 to provide an engineered higher flame 41 on the backside of the U-shaped burner 15 in front of the larger ceramic lo 37, as shown in Figure 6, and less height in front of the smaller ceramic log 37. The gas burner's design creates a double-depth dimensional illusion which is both realistic and pleasing to the eye. The ceramic logs 37 are bolted 31 into position to allow the drafting air flow 42 to lick upward without being impeded by misplacement of the ceramic logs 37. Other logs can be mounted over those that are bolted, depending on one's aesthetic tastes.
The refractory ceramic tubes 12 have a mineralogical come position of 45% cordierite, 30% Malta, and 25% siliceous glass, and have been heat tested at 1300 C ~2300 F) under direct gas flame 41 and weighted pressure of 3500/lb/sq.inch to show no ill effects. The openness of the gas flame 41 moved by secondary air 35 fluctuating does not permit the ceramic tubes 12 to build up a temperature close to its tested utmost. In consequence thereof, there is a definite long-term life expectancy and no chance of a burnout or split occurring either in the ceramic tubes 12 or thermal cement.
The Robertshaw valve control 25 provides safe instant iguana-lion to a standing pilot 27 whose light is adjustable from its main control 25. The removal of its 3.5" water column regulator to non-regulated pressure converts the control 25 from either natural or butane gas usage to propane; changing the orifice 34 from a #33 drill hole to a #55 drill hole completes the convert soon.
The variable fan switch 28 which can alternately be mounted on either side of the machine 1, is used to vary the amount of heated air being recycled in order to obtain the desired tempera-lure within the room. If the room becomes too hot the fan can be shut off in which case the flame will continue but 85% of the heat produced by the flame will be released up the chimney.
I. I.. ,, I, .. . .
lZ39314 Conversely, if maximum heat is desired at lowest cost, the flame 41 can be reduced to an even 1/2" around the burner 15 in which case the ceramic tubes 12 will continue to maintain constant them-portray and return of heat but at a fraction of minimum gas usage and resulting cost.
The ceramic logs 37 can be removed by removing the log bolts 31. It is then possible to place cooking vessels on top of the ceramic tubes 12 for cooking indoors. For outdoor cooking the machine 1 can be disconnected at the gas inlet and connected to a portable container of gas.
~23~3~
END
1. Heat exchange machine 8. Air inlet 12. Lifetime sealed ceramic tubes 15. Main burner pipe 18. Primary air shelter 22. Louvered air inlet grille 23. Filter screen 24. Top louver grate 25. Robertshaw valve control 26. Dayton blown motor 27. Thermal pilot light 28. Variable fan switch 31. Log bolts 34. Orifice 35. Secondary air side vent 36. Removable swing covers 37. Ceramic logs 38. Average fireplace 39. Manifold 40. Hot air outlet 41. Gas flames 42. Draft air flow
The disadvantages of inefficient wood burning fireplaces in-elude having to obtain, chop and store wood, dispose of ashes, clean the chimney, and live with the resulting air pollution.
These disadvantages have led to an on-going effort to apt proximate the coziness and appearance of a live fire through simulated gas flames produced by gas log fireplace sets. The drawback of conventional gas log fireplace sets, as with solid fuel fireplaces, is that over 85 percent of their generated heat is lost through the chimney vent. Therefore, a machine which produces a realistic looking gas flame while capturing and air-quilting the potential heat energy loss into the home is desirable.
There have been many attempts to develop such a machine for use with solid burning fuels using blower fans and metal conduit pipes, but none employing gaseous fuels using an engineered bun-nor to provide regulated flames to pass heat through ceramic conduits.
These prior attempts all lack one or more important kirk-teristics which this invention has; such as, a proper lint filter to prevent recirculation of undesirable dusty air, simplicity and economy of design, efficiency of heat transfer through durable ceramic tubes rather than short-life metal conduits, adaptability to most sizes of fireplaces, attractive appearance, portability with convertibility to outdoor or indoor cooking use and a U-shaped gas burner engineered to provide a controlled double-depth dimensional flame for realistic viewing and heating comfort.
Using metal pipes as heat conduits creates the danger of burnout which results in poisonous monoxides being circulated into the house. The present invention overcomes this problem by using ceramic tubes as heat conduits which tubes can retain a greater temperature over a longer period of time. The invention can be converted from natural gas to propane and vise versa. The invention is designed to allow for the use of a fireplace screen or glass doors to enhance the decorative appearance of the fireplace. The invention includes a variable speed blower con-trot and gas valve control so that the desired amount of heat r,, 1:~393~4 and/or flame can be produced. The apertures on the gas burner are sized and spaced so as to produce a realistic double-depth dimensional flame with varying height. The invention can be used as an alternative for heating, lighting and cooking in the event of electrical failure. The invention is portable and can be used as a cook stove outdoors as well as indoors. The cost of using natural gas or using propane with the invention is almost equal because natural gas has 1 1/2 times less heating value and is burnt at 3 times less inch water column pressure than propane which results in lower British Thermal Unit input balances.
The present invention provides a heat exchanger of rugged construction with its 121 cubic feet per minute electrical blower protected against heat inside a lint free sealed chamber. Its valve and fan controls are easily accessible yet discretely hidden by a piano-hinged door outside and below the level of intense heat. A plurality of lifetime sealed ceramic tubes tested to at-low for heat expansion and cooling contraction with natural, butane, and propane gases divert the heated air at wide angles.
The horizontal U-shaped gas burner with a controllable primary air inlet has a plurality of varying-sized apertures spaced apart to form a consistent design which governs the height and color of the gas flame in a regulated undulating pattern under and around the ceramic tubes. The two decorative ceramic logs are bolted into position to allow the realistic drafted flame to ascend in front of the logs toward the chimney vent. There may be other twig-shaped ceramic logs resting on the bolted logs for aesthetic purposes. A standing pilot burner provides instant flame iguana-lion and because of the aperture spacing there is no pouf-pouf flashback.
In the drawings:
igure 1 is a partly broken away perspective view of a gas log fireplace heat exchanger machine in accordance with the present invention.
igure 2 is an illustration showing a side view of the machine of Figure 1 within a fireplace.
igure 3 is a partial schematic frontal view showing the embodiment of flame pattern produced by the machine of Figure 1.
:~235~3~
igure d is a sea tonal view of the ceramic tube placements.
igure 5 is a top perspective view of the gas burner showing the spacing and sizing of the apertures.
igure 6 is a top perspective of the decorative gas log placement.
igure 7 is a frontal view of the louvered inlet filter vent.
igure 8 is a Errantly view of the louvered wide-angled exit vent.
igure 9 is an end view of the gas valve and fan control positions.
Figure 1 shows a gas log fireplace heat exchanger machine which is rectangular in shape with dimensions of 14 3/4" in depth, I 3/4" in width, and 9 1/4" in height. The machine's air inlet on its front wall faces inside a room within a fireplace 38 as shown in Figure 2. The air is pulled by a squirrel-caged air blower 26 through downward-sloped horizontal louvers as shown in Figure 4 to draw the coolest air inward from the lower hearth or floor level. The air as shown in Figure 1 is drawn through a filter screen 23 to ensure its lint free return, passed into a sealed chamber 8 to be force blown through the manifold 39 whose outside back lays parallel to the rear of the fireplace 38 wall.
Thick walled ceramic tubes 12 are inset into the manifold 39 and extend at right angles forward to the front body wall of the machine shown in figure 1. The foot long tubes 12 are sealed in position with thermal cement which, like the ceramics themselves, maintains its flexural strength while allowing for heating expand soon and cooling contraction. The air passes through the hollow center 40 of the ceramic tubes 12 which are heated from gas flames 41 below and on either side of their cylindrical shape as is shown in Figure 3. On emerging, the air which is heated up to 175 F is diverted by vertical louvers 24 to ascend into the room area at right and left angles from the machine in figure 1.
The air blower 26 is thermally insulated, being inside a 1/8" steel-walled sealed chamber 8 and below the gas burner 15 as shown enlarged in Figure 5, and is designed two shut off should excessive motor temperature develop (over 40 C or 104F). The air blower 26 is capable of moving 121 cubic f cot of air per minute and can recycle the cubic capacity of a 10'x 20' room every f fifteen minutes.
lZ393~4 The gas burner 15 is U-shaped and rests horizontally lengthwise on the top surf ace of the machine 1 as is shown in Figure 5. The apertures on the gas burner's 15 upper side are purposely spaced with 5/16" centers and in a precise pattern of 22 large #42 drill holes (.0935~ and 72 smaller #56 drill holes (.0465). By adjusting the primary air shutter 18, the gas flames 41 as shown in figure 3 can be adjusted in height and color.
Desirably the perfect flame 41 would allow a 1/2" of air space between its tip underneath the ceramic tubes 12. The location of the larger #42 drill holes are interspaced between the ceramic tubes 12 to provide an engineered higher flame 41 on the backside of the U-shaped burner 15 in front of the larger ceramic lo 37, as shown in Figure 6, and less height in front of the smaller ceramic log 37. The gas burner's design creates a double-depth dimensional illusion which is both realistic and pleasing to the eye. The ceramic logs 37 are bolted 31 into position to allow the drafting air flow 42 to lick upward without being impeded by misplacement of the ceramic logs 37. Other logs can be mounted over those that are bolted, depending on one's aesthetic tastes.
The refractory ceramic tubes 12 have a mineralogical come position of 45% cordierite, 30% Malta, and 25% siliceous glass, and have been heat tested at 1300 C ~2300 F) under direct gas flame 41 and weighted pressure of 3500/lb/sq.inch to show no ill effects. The openness of the gas flame 41 moved by secondary air 35 fluctuating does not permit the ceramic tubes 12 to build up a temperature close to its tested utmost. In consequence thereof, there is a definite long-term life expectancy and no chance of a burnout or split occurring either in the ceramic tubes 12 or thermal cement.
The Robertshaw valve control 25 provides safe instant iguana-lion to a standing pilot 27 whose light is adjustable from its main control 25. The removal of its 3.5" water column regulator to non-regulated pressure converts the control 25 from either natural or butane gas usage to propane; changing the orifice 34 from a #33 drill hole to a #55 drill hole completes the convert soon.
The variable fan switch 28 which can alternately be mounted on either side of the machine 1, is used to vary the amount of heated air being recycled in order to obtain the desired tempera-lure within the room. If the room becomes too hot the fan can be shut off in which case the flame will continue but 85% of the heat produced by the flame will be released up the chimney.
I. I.. ,, I, .. . .
lZ39314 Conversely, if maximum heat is desired at lowest cost, the flame 41 can be reduced to an even 1/2" around the burner 15 in which case the ceramic tubes 12 will continue to maintain constant them-portray and return of heat but at a fraction of minimum gas usage and resulting cost.
The ceramic logs 37 can be removed by removing the log bolts 31. It is then possible to place cooking vessels on top of the ceramic tubes 12 for cooking indoors. For outdoor cooking the machine 1 can be disconnected at the gas inlet and connected to a portable container of gas.
~23~3~
END
1. Heat exchange machine 8. Air inlet 12. Lifetime sealed ceramic tubes 15. Main burner pipe 18. Primary air shelter 22. Louvered air inlet grille 23. Filter screen 24. Top louver grate 25. Robertshaw valve control 26. Dayton blown motor 27. Thermal pilot light 28. Variable fan switch 31. Log bolts 34. Orifice 35. Secondary air side vent 36. Removable swing covers 37. Ceramic logs 38. Average fireplace 39. Manifold 40. Hot air outlet 41. Gas flames 42. Draft air flow
Claims (8)
AN EXCLUSIVE PROPERTY OR PRIVILEGE IS CLAIMED
ARE DEFINED AS FOLLOWS:
1. A gas log fireplace heat exchanger machine, comprising:
an electric blower fan insulated in a sealed chamber which fan forces distribution through a manifold extended across the rear of the machine parallel to the back wall of the fireplace;
a screen to filter indrawn air through downward-sloped horizontal louvered fins;
a series of replaceable cylindrical ceramic tubes whose hollow cores act to transfer heated air and are inter-connected and sealed with thermal cement into the said manifold which tubes extend forward and are sealed in the front body wall facing the fireplace opening;
a vertical-slated louvered grating covering the exiting air flow from the ceramic tubes and diverting the ascending heated air at wide right and left angles;
a horizontal U-shaped gas burner secured horizontally on the outside top surface of the aforementioned sealed chamber and having a shutter to control the color and flame texture through the primary air inlet on the underside thereof, together with side vents on both ends of the rectangular machine's wall to provide secondary combustion air supply which said hollow gas burner has a plurality of specific apertures on its upper exterior, spaced apart and in varying sizes, forming a consistent design governing the height of the gas flame in a regulated undulating pattern;
a variable speed fan control to regulate the desired amount of heated air return;
a gas control valve to regulate the desired amount of gas flow and convertible to various gaseous fuels by alternating the pressure regulator and orifice sizing;
and a set of adjustable bolts to secure the decorative ceramic logs in a position which will not impede the drafted flow of flame toward the chimney vent or produce an overabundance or carbon.
an electric blower fan insulated in a sealed chamber which fan forces distribution through a manifold extended across the rear of the machine parallel to the back wall of the fireplace;
a screen to filter indrawn air through downward-sloped horizontal louvered fins;
a series of replaceable cylindrical ceramic tubes whose hollow cores act to transfer heated air and are inter-connected and sealed with thermal cement into the said manifold which tubes extend forward and are sealed in the front body wall facing the fireplace opening;
a vertical-slated louvered grating covering the exiting air flow from the ceramic tubes and diverting the ascending heated air at wide right and left angles;
a horizontal U-shaped gas burner secured horizontally on the outside top surface of the aforementioned sealed chamber and having a shutter to control the color and flame texture through the primary air inlet on the underside thereof, together with side vents on both ends of the rectangular machine's wall to provide secondary combustion air supply which said hollow gas burner has a plurality of specific apertures on its upper exterior, spaced apart and in varying sizes, forming a consistent design governing the height of the gas flame in a regulated undulating pattern;
a variable speed fan control to regulate the desired amount of heated air return;
a gas control valve to regulate the desired amount of gas flow and convertible to various gaseous fuels by alternating the pressure regulator and orifice sizing;
and a set of adjustable bolts to secure the decorative ceramic logs in a position which will not impede the drafted flow of flame toward the chimney vent or produce an overabundance or carbon.
2. A gas log fireplace heat exchanger machine according to claim 1, which uses ceramic tubes as heat transfer conduits which tubes are of such a composition as to insure against burnout and which can be replaced if accidentally broken.
3. A gas log fireplace heat exchanger machine according to claim 1, which has a removable water column regulator which allows for a simple quick and energy efficient conversion from natural and butane gas to propane.
4. A gas log fireplace heat exchanger machine according to claim 1, with removable logs, a cooking surface and an adjustable efficient flame controlled by its primary air shutter.
5. A gas log fireplace heat exchanger machine according to claim 1, which is portable and can be removed from a vented fireplace and used for cooking outdoors.
6. A gas log fireplace heat exchanger machine according to claim 1, which has a hollow gas burner with a plurality of apertures on the top which apertures are spaced apart and in varying sizes so as to provide a realistic double-depth dimensional flame, higher in the rear and drafting to the fireplace centre, with shorter flames in the front drafting upward.
7. A gas log fireplace heat exchanger machine according to claim 1, which has an adjustable air control shutter which provides total control over the flame's height, color, and texture.
8. A gas log fireplace heat exchanger machine according to claim 1, which is designed in such proportions so as to allow the use of fireplace screens or glass doors above the louvered vent level to enhance the anesthetics of the fireplace without restricting either the flame or heating benefits.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000552805A CA1239314A (en) | 1987-11-23 | 1987-11-23 | Gas log fireplace heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000552805A CA1239314A (en) | 1987-11-23 | 1987-11-23 | Gas log fireplace heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1239314A true CA1239314A (en) | 1988-07-19 |
Family
ID=4136934
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000552805A Expired CA1239314A (en) | 1987-11-23 | 1987-11-23 | Gas log fireplace heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1239314A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5243965A (en) * | 1991-08-16 | 1993-09-14 | Majco Building Specialties, L.P. | Heat producing gas log apparatus |
-
1987
- 1987-11-23 CA CA000552805A patent/CA1239314A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5243965A (en) * | 1991-08-16 | 1993-09-14 | Majco Building Specialties, L.P. | Heat producing gas log apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |