Abstract: A flange (1) for optical flame observation in a gas turbine includes at least one bore for optical observation, in which bore there is arranged at least one pane (9, 10) for separating the flame-side space, which is in substantially direct communication with a combustion chamber in which the at least one flame that is to be monitored is arranged, from the outside space, from which the observation of the at least one flame can take place. In a flange (1) of this type, fogging of the at least one pane (9, 10) is made possible in a simple manner which can be guaranteed over a prolonged period of time by virtue of the fact that two panes (9, 10), which delimit a sealed intermediate space (22) in the bore for optical observation, are arranged one behind the other with respect to the optical axis (8), and that a device (24) for dehumidifying the sealed intermediate space (22) is includes.

Abstract: A peripherally encapsulated product, such as an oven door outer shell, is molded in accordance with this invention by placing a piece of glass between mold clamping portions of relatively movable closed bodies when the latter are in an open position. Preferably both bodies are heated and thermosetting polymeric material (SMC or BMC) is placed upon selected areas of one of the mold bodies within and about an area corresponding to an annular mold cavity and outboard of a peripheral edge of a piece of glass. The glass is clamped between mold clamping portions of the mold bodies which are then progressively closed creating compression forces which extrude the thermosetting polymeric material into the annular cavity and into complete encapsulation of the continuous peripheral edge of the piece of glass. The handle can be integrally molded during the molding process.

Abstract: A cooking device including a cooking area, a door for closing the cooking area and a lighting system for lighting the cooking area. The lighting system includes a light source and at least one reflector arranged in the internal space of the door, which reflects light from the light source into the cooking area. In order to reduce mechanical strain applied to the light source, it is arranged outside the door and emits light towards the reflector inside the door to be reflected into the cooking area.

Abstract: A peripherally encapsulated product, such as an oven door outer shell, is molded in accordance with this invention by placing a piece of glass between mold clamping portions of relatively movable closed bodies when the latter are in an open position. Preferably both bodies are heated and thermosetting polymeric material (SMC or BMC) is placed upon selected areas of one of the mold bodies within and about an area corresponding to an annular mold cavity and outboard of a peripheral edge of a piece of glass. The glass is clamped between mold clamping portions of the mold bodies which are then progressively closed creating compression forces which extrude the thermosetting polymeric material into the annular cavity and into complete encapsulation of the continuous peripheral edge of the piece of glass. The handle can be integrally molded during the molding process.

Abstract: An oven door includes a transparent zone defined by a window pack and an additional piece of glass arranged in front of the window pack. Specifically, the additional piece of glass is mounted at an angle to the panes of the window pack, with the angled glass diverging farther from the window pack at an upper section than at a lower section. Through mounting the angled piece of glass in the door as set forth above, a chimney effect is established for heat conducted through the door such that an attainable temperature at a front surface of the door is significantly reduced.

Abstract: A cooking oven includes a heatable oven chamber (6) that can be loaded with product from the outside area (A) through a loading port (8). An oven door (10) serves to close off the loading port (8) of the oven chamber (6) from the outside area (A). An inner pane (50) faces the oven chamber (6), an outer pane (48) faces the outside area (A), and one or several intermediate panes (52) are positioned between the inner pane (50) and the outer pane (48). An outer cavity (54) is between the outer pane (48) and the neighboring intermediate pane (52) and an inner cavity space (56) is between the inner pane (50) and the neighboring intermediate pane (52). A cooling system moves cooling air (K1) through the outer cavity (54) while thermally insulating air (I) can be held stationary in the inner cavity (56).

Abstract: A cooking appliance includes a cooking chamber that can be closed by a door having a multi-pane structure, including at least one inner pane and one front pane. The invention configures the cooking appliance such that the surface temperature on the outer side of the front pane is as low as possible. To this end, the inner pane is embodied in a tray-like manner and is fixed to the front pane by holding elements that are disposed on the inner side of the front pane inside the circumferential edge of the inner pane.

Abstract: The microwave unit door includes a metallic door frame (1) with an interior glass pane (3) and outer glass pane (2) held spaced apart in it. To improve the observability of the interior of the microwave unit without loosing the microwave shielding effect, e.g. previously provided by a metal screen between the glass panes, and to prevent condensate formation, the interior glass pane (3) closest to the processing space (I) has at least one optically transparent electrically conductive first layer (13) with a microwave absorption capability such that it heats up to prevent condensate formation during operation. The outer glass pane (2) has at least one optically transparent electrically conductive second layer (12) reflecting microwaves passing through the first layer.

Abstract: An oven provided with a main body forming an oven compartment, and a door in contact with the main body to open and close the main body, the door including: an inner cover facing the oven compartment having an opening to show the interior of the oven compartment; a transparent window in the opening of the inner cover; and a supporting member supporting the transparent window against the inner cover, wherein a window accommodating part is extended toward the inside of the oven compartment from the periphery of the opening for accommodating the transparent window. Thus, a fixing means such as a jig and liquid sealant used for providing the transparent window to the door of the conventional oven are not necessary in the oven according to the present invention. Therefore, assembling the oven can be simplified, thereby enhancing productivity.

Abstract: An oven door includes a transparent zone defined by a window pack and an additional piece of glass arranged in front of the window pack. Specifically, the additional piece of glass is mounted at an angle to the panes of the window pack, with the angled glass diverging farther from the window pack at an upper section than at a lower section. Through mounting the angled piece of glass in the door as set forth above, a chimney effect is established for heat conducted through the door such that an attainable temperature at a front surface of the door is significantly reduced.

Abstract: A cooking oven includes a heatable oven chamber (6) that can be loaded with product from the outside area (A) through a loading port (8). An oven door (10) serves to close off the loading port (8) of the oven chamber (6) from the outside area (A). An inner pane (50) faces the oven chamber (6), an outer pane (48) faces the outside area (A), and one or several intermediate panes (52) are positioned between the inner pane (50) and the outer pane (48). An outer cavity (54) is between the outer pane (48) and the neighboring intermediate pane (52) and an inner cavity space (56) is between the inner pane (50) and the neighboring intermediate pane (52). A cooling system moves cooling air (K1) through the outer cavity (54) while thermally insulating air (I) can be held stationary in the inner cavity (56).

Abstract: A cooking appliance includes a cooking chamber that can be closed by a door having a multi-pane structure, including at least one inner pane and one front pane. The invention configures the cooking appliance such that the surface temperature on the outer side of the front pane is as low as possible. To this end, the inner pane is embodied in a tray-like manner and is fixed to the front pane by holding elements that are disposed on the inner side of the front pane inside the circumferential edge of the inner pane.

Abstract: There is now provided an electric stove with an electric stove body having an exterior comprising side walls, a top, and a bottom spaced from said top. The top has a an exterior top surface on which are disposed a plurality of electric heating elements. The electric heating elements of the top surface are controllable by control apparatus to provide heat sufficient to cook food in cooking utensils, upon such cooking utensils being placed with their bottom on a corresponding electric heating element. The electric heating elements and their corresponding control apparatus are connected by electric circuitry such that the heat produced by the electric heating elements can be set at a desired temperature for cooking food. Electric heating arrangements are also found in the stove. These heating arrangements are connected by electric circuitry to control apparatus so as to permit selection of a cooking temperature in the electric stove.

Abstract: A fireplace including a combustion chamber enclosure with an opening and an inner pane positioned to at least partially cover the opening of the combustion chamber. An outer pane is spaced apart from the inner pane, the outer pane and the inner pane creating a space through which air moves, the air cooling the outer pane. A blower may be provided to move the air through the space. The outer pane may be angled with respect to the inner pane to enhance air movement.

Abstract: The window for a hot chamber sealed off from the surroundings includes a multi-pane module. The multi-pane module has at least two transparent panes (1, 2) held apart by peripheral spacers (3) and interconnected with the peripheral spacers (3) in a gas-tight fashion so that the transparent panes and spacers bound an interior space (9). The peripheral spacers (3) are provided with at least one through-going opening (5), each of which is closed with a replaceable, permeable filter pad (6). This permeable filter pad (6) permits gases to penetrate the filter pad (6) for gas exchange in order to prevent pressure build up in the interior space between the panes and spacers, but prevents water vapor and other vapors containing grease, oil and other contaminating particles from entering the interior space.

Abstract: A cooking area cover panel that is to be applied separately for a cooking area is produced of a substantially breaking-resistant material and has a safety film on at least one flat surface of the cooking area cover panel. The safety film is configured such that in the event of a fracture of the cooking area cover panel the safety film essentially holds the fragments together.

Abstract: An insulating glass door for a cooking chamber of a cooking appliance is formed by an insulating glass window composed of two individual panes which are spaced apart for forming an interspace therebetween, which is sealed by an insulating material. The door includes at least one door component which is integrated and extends between the two spaced-apart panes.

Abstract: There is now provided a kitchen stove for preparing food, and an oven for preparing food. The stove or oven has a heating arrangement to make the cleaning of the stove or oven easier for a user particularly at the viewing window of the oven.

Abstract: There is now provided an electric stove with an electric stove body having an exterior comprising side walls, a top, and a bottom spaced from said top. The top has a an exterior top surface on which are disposed a plurality of electric heating elements. The electric heating elements of the top surface are controllable by control apparatus to provide heat sufficient to cook food in cooking utensils, upon such cooking utensils being placed with their bottom on a corresponding electric heating element. The electric heating elements and their corresponding control apparatus are connected by electric circuitry such that the heat produced by the electric heating elements can be set at a desired temperature for cooking food. Electric heating arrangements are also found in the stove. These heating arrangements are connected by electric circuitry to control apparatus so as to permit selection of a cooking temperature in the electric stove.

Abstract: There is now provided an electric stove to cook food having electric heating elements to cook food, arrange with the body of the electric stove upon cooking of food with the electric stove and having a structure on the electric stove body to protect the electric stove while cooking with the electric heating elements when the electric heating elements are turned on and when the electric heating elements may be either hot or cold, the exterior of the electric stove from scratches and abrasive wear during use of the electric stove upon cooking with the electric heating elements when the electric heating elements are turned on and when the electric heating elements may be either hot or cold and an inner structure to minimize heat from the interior of the electric stove reaching the exterior of the electric stove during use of the electric heating elements to cook food. This invention is applicable to like appliances. The outer structure has a hardness which is greater than the hardness of inner structure.

Abstract: According to prior art, such windows are typically configured as a multiple glass pane module which is provided with at least two transparent glass panes (1, 2) that are held by means of distance pieces (3) in such a way that said panes are spaced apart. Said distance pieces are glued together with said panes (1, 2) in a gas-tight manner. The aim of the invention is to provide a gas pressure compensation between the inner chamber between the two panes (1, 2) and the surroundings without said panes getting dirty. According to the invention, the window is designed in such a way that at least one opening (5) is embodied in the distance pieces (3). Said opening is closed by means of a permeable filter (6) that enables gas to penetrate for pressure compensation but prevents steam and vapours to enter.

Abstract: The invention relates to a stove for cooking food with a viewing window, and a viewing window for household appliances, such as cooking stoves or ovens, which window can be mounted in a wall of the housing of the stove for cooking food or the household appliance such as a cooking stove or oven, and which window is comprised of at least two transparent panes arranged at a distance from one another, whereby between the two transparent panes there is contemplated a screen, or blind, which covers, or closes, the viewing area, and which screen is adjustable from the exterior of the appliance.

Abstract: A front surround or enclosure for overlying the open front of a fireplace box is disclosed. The enclosure has a relatively narrow peripheral frame that carries one or a plurality of glass panels that substantially fill the enclosed area defined by the outer frame. The glass panels may be rigidly secured to the frame or can be configured as operable doors. Patterns configured by silk screening or other application techniques are selectively applied, preferably to the inner surface(s), of the glass panel(s) to enhance visual appeal of the glass and/or to selectively mask the viewer's vision through the glass. Quick release brackets are provided for detachably securing the enclosure to the front of a fireplace box.

Abstract: There is now provided a kitchen stove for preparing food, and an oven for preparing food. The stove or oven has a heating arrangement to make the cleaning of the stove or oven easier for a user particularly at the viewing window of the oven.

Abstract: The invention relates to a stove for cooking food with a viewing window, and a viewing window for household appliances, such as cooking stoves or ovens, which window can be mounted in a wall of the housing of the stove for cooking food or the household appliance such as a cooking stove or oven, and which window is comprised of at least two transparent panes arranged at a distance from one another, whereby between the two transparent panes there is contemplated a screen, or blind, which covers, or closes, the viewing area, and which screen is adjustable from the exterior of the appliance.

Abstract: An insulating glass door for a cooking chamber of a cooking appliance is formed by an insulating glass window composed of two individual panes which are spaced apart for forming an interspace therebetween, which is sealed by an insulating material. The door includes at least one door component which is integrated and extends between the two spaced-apart panes.

Abstract: An oven view window comprising a glass substrate, and having disposed on a major surface thereof, a thermally activated, light-scattering coating which, when at a temperature below the activation temperature of the coating is translucent-to-opaque in appearance, but when at a temperature above the activation temperature of the coating is essentially transparent in appearance. Optionally, an infrared reflective coating and a color suppressing coating may also be deposited, in a variety of configurations, onto the oven view window carrying the thermally activated, light-scattering coating.

Abstract: Door to a microwave oven including a door panel which forms a frame of the door, a front panel fitted to a front face of the door panel, a door frame fitted to rear face of the door panel, and a control part fitted between the front panel and the door frame for receiving a work order from a user, controlling an electric component, and indicating various information, thereby permitting handling of the door and servicing to the control part easy, and preventing damage to the first cable.

Abstract: An oven view window comprising a glass substrate, and having disposed on a major surface thereof, a thermally activated, light-scattering coating which, when at a temperature below the activation temperature of the coating is translucent-to-opaque in appearance, but when at a temperature above the activation temperature of the coating is essentially transparent in appearance. Optionally, an infrared reflective coating and a color suppressing coating may also be deposited, in a variety of configurations, onto the oven view window carrying the thermally activated, light-scattering coating.

Abstract: A combination portable gas barbecue and portable simulation fireplace includes a cooking vessel having imitation fireplace logs and a gas burner mounted on a lift-out log grate. A window is mounted in the front of the cooking vessel to allow direct viewing of the imitation logs and flames and of the underside of the food being cooked. Air inlet and outlets cause convection currents to flow away from the viewing window and out side vents formed by gaps between an oversized hood and the cooking vessel. An air convection system is set up by providing an air inlet below the window and outlet air gaps between the hood and the cooking vessel. A deflector is provided over the viewing window to prevent grease drippings from soiling the window or falling into the air inlet.

Abstract: A dismantlable door (22) seals an opening (24) in a chamber (20) of a washer. The door includes removable glass panes (36) and (38) which allow an operator to view the contents of the washing chamber during a washing cycle. A connecting member (40, 132, 156, 180, 200, 216, 220, 244, 250) seals the inner glass pane (36) to a frame (28) of the door by compressing a gasket (42). In one preferred embodiment, the connecting member also receives a lower end 102 of the outer pane (38) in a channel (100, 202'). In other preferred embodiments a channel (131, 242) or L-shaped flange (224) is connected with the lower end of the door frame for supporting the lower end (102) of the outer glass pane. In yet another preferred embodiment, fixing members (258) connect the outer glass pane to the connecting member. An air space (170) is formed between the inner and outer panes. Air is able to enter and leave the air space through air gaps between the channel and the outer panes.

Abstract: The present invention relates to a device for removing dampness form a cooking space (3) of a steam cooking device or a pressure cooker (1). The cooking space is at least partially filled with steam. The steam or the mixture of hot air and steam, respectively, is circulated in the cooking space (3) by means of a ventilating wheel (9) or a radial fan. The gas mixture to be circulated is sucked in substantially axially in the central area (10) of the ventilating wheel (9) and is drawn off to the outside substantially radially, with superfluous steam or superfluous mixture of hot air and steam, respectively, being removed from the cooking space (3) through a waste air opening (11) and dry fresh air being supplied from the outside for removing dampness. The dry fresh air is supplied at the rear, is sucked in through an opening (27) provided in the rear front end (25) of the ventilating wheel (9) and is deflected to the outside of the ventilating wheel (9) by way of a deflecting device (29).

Abstract: Disclosed is a window construction for a heater, which generally has a frame and at least one panel fitted on the frame. The frame and the at least one panel are usually made of different materials having different expansion coefficients. An expansion compensator made of bimetallic material is provided to the window located between the frame and a distal portion of the at least one panel to otherwise contact the frame. The expansion compensator compensates the differential expansions occurring between the frame and the at least one panel as the heater temperature changes.

Abstract: An oven includes a body portion and a door engageable with the body portion, the body portion being generally cylindrical in shape having two lateral sides each formed with a circular groove, each of the lateral sides having two vertical slots extending upwardly from the circular groove, the door having two flanges at two ends thereof each provided with two protuberances at an inner side thereof, the protuberances being configured to be slidable within the circular groove and the vertical slots, whereby the door can be dismantled from the body portion for removing the grease and other drippings extracted from food during the roasting process.

Abstract: A coated glass article is comprised of a transparent infrared reflective coating disposed on each major surface of a glass substrate. The glass article has a particular application as part of the window assembly for an oven door of a self cleaning oven. The window assembly includes a first glass substrate and a second glass substrate and a frame which supports the first and second glass substrates in a spaced apart and mutually parallel relationship. An infrared reflective coating is disposed preferably on both major surfaces of the first and second glass substrates. The invention also includes the method of making the coated glass article.

Abstract: The invention is directed to a top cover for a barbecue grill which includes a casting with an aperture formed in the surface. A flexible insert is designed to close the aperture. The casting includes a support on at least one side of the aperture and at least one fastener to hold the insert in place in the casting. The support and fastener also seal the aperture by pressing the insert against the casting.

Abstract: A door for the oven of a cooking range includes an inner panel that closes the oven and an outer panel spaced from the inner panel. The inner and outer panels are connected adjacent their upper edges by an upper panel. The inner panel includes a first window in the form of a wide-angle lens. The upper panel includes a second window. Light-transmissive devices including a prism and a mirror are disposed between the inner and outer panels so as to direct light received through the lens upwardly and outwardly through the second window. The interior of the oven is illuminated by low-voltage halogen lights carried by the inner panel. The door is insulated by disposing a microporous metal oxide thermal insulation material against the oven side of the inner panel. The insulation is held in place by a plate. The door includes an oven-contacting gasket that extends beyond the boundaries of the plate to provide a thermal barrier when the door off the oven is closed.

Abstract: The invention is an oven door construction and assembly in which the oven door construction and its part count are greatly reduced and simplified as is the method of assembly in the door. The door is assembled by placing interior door elements on an inner liner and using the hinges of the door to compressively mount the interior door elements to the liner to thereby eliminate a great number of fasteners typically used in this type of door construction.

Abstract: An oven door includes a bottom trim frame having each end connected to a bottom end of a leg of a U-shaped door trim frame, which has a top portion connected to the legs at their upper ends. A rectangular shaped pane of glass has its bottom edge supported in a channel in the bottom trim frame and its upper edge supported in a channel in a vent or upper trim frame, which is connected to the top portion of the U-shaped door trim frame. The channels also retain the pane of glass against horizontal movement. The side edges of the pane of glass are exposed for a decorative look. A pair of door end caps, which are supported on the legs of the U-shaped door trim frame and formed of a heat insulating material, also aid in preventing horizontal motion of the pane of glass.

Abstract: A window unit for an oven door having a pair of rectangular window panels held in spaced parallel relation by a frame. The frame is an endless rectangular member. The sides and ends of the frame are generally U-shaped in cross-section having spacer flanges engaging the inner faces of the panels to hold the panels spaced apart. Retainer flanges extend laterally outwardly from the spacer flanges over the edges of the panels. Clips are provided to clamp the panels to the frame.

Abstract: An oven door has an RF choke, an outer choke cover, first and second inner choke cover members, and a contaminant barrier The RF choke has a first side which is oriented away from a cooking chamber of an oven, and the RF choke has a second side which is oriented toward a cooking chamber of an oven. The outer choke cover abuts the first side of the RF choke. The first inner choke cover member has a gasket, and the first inner choke cover member is microwave safe. The contaminant barrier abuts the gasket of the first inner choke cover member. The second inner choke cover member abuts the contaminant barrier so that the contaminant barrier is sandwiched between the first and second inner choke cover members. The second inner choke cover member is microwave safe.

Abstract: A gas burning direct vent fireplace having an outer casing within which a firebox is mounted. The sides of the firebox are secured to the sides of the casing so that the bottom of the firebox is spaced above the floor of the casing without the need for supporting legs for the fireplace. An access door having a glass plate is fastened to the firebox at the front and a front panel is removably carried by the casing in front of and spaced from the glass plate access door, the front panel having an opening permitting viewing of the interior of the firebox through the glass plate. The mounting of the front panel permits a variety of selective front panels having varying aesthetics to be used with a fireplace.

Abstract: A closed-combustion gas fireplace having a glass panel and a means for reducing the temperature of the upper end of the glass panel is disclosed. The temperature reducing means comprises a downwardly depending baffle spaced apart from the upper end of the glass panel to form a channel within the combustion chamber adjacent the upper end of the glass panel. The channel reduces movement of hot gases adjacent the upper end of the glass panel thereby reducing the glass temperatures at that location.

Abstract: An oven door of a kitchen stove includes an inner door bottom, an outer door unit having additional door elements and a front panel being formed of glass or glass-like material and forming a door front. Connecting elements act as carriers for the additional door elements. The connecting elements are secured directly or indirectly to the front panel and are connected to the door bottom through contact points of low capacity for heat exchange, for joining the front panel to the door bottom.

Abstract: A heat-insulating viewing window or door for an apparatus has an inner temperature in a cavity of the apparatus which deviates from the temperature of the ambient in which the apparatus operates. The viewing window is especially for cooking or baking ovens or dryers. The viewing window includes an arrangement of plates positioned at spacings from each other and held in a common frame. The plates can be made of glass, glass ceramic or another transparent temperature-resistant material. At least one further plate is mounted between the plate subjected to the ambient temperature and the plate subjected to the temperature of the interior cavity of the apparatus.

Abstract: A self-cleaning gas-fueled oven for cooking with a flameholder and door which permit self-cleaning at temperatures exceeding 900.degree. F. The flameholder has a grille divided into two opposed, substantially flat portions, each of which contains an array of ports of two distinct sizes. The smaller-sized ports are tapered, increasing in cross-sectional area in the direction of gas flow through the grille. The oven door has a lip extending substantially perpendicularly from the door's sidewalls so as to overlap the periphery of the door's inner panel.

Abstract: An oven door has a substantially vertical air passage through which air flows by convection. Air enters the air passage through air inlets at the bottom of a substantially rectangular decorative trim frame, which supports a front pane of glass, and the bottom of an inner liner to which the frame is attached. Air in the air passage flows over the substantially rectangular front pane of glass along its inner surface. The frame has air outlets, which are above the front pane of glass and communicate with the air passage to provide the only exit, to direct air substantially horizontally in the substantially horizontal plane of a handle assembly on the door. The frame has a baffle disposed within the air passage for deflecting air therefrom through the air outlets and over the handle gripping portion. The air passage is closed above the baffle, and stagnant air above the baffle functions as a heat insulator.

Abstract: The oven door comprises a frame on which two panes are mounted. These two panes are parallel and spaced apart from each other. The inside pane is hinge-mounted relative to the frame by means of a hinge piece and pivatable about a hinge axis at a lateral side of the frame. Rapid-action locking and unlocking closure means, that are point spacers, are situated remote from the hinge axis of the inside pane. The spacers enable the inside pane to be held in a closed position relative to the frame. The point spacers provide rapid-action locking and unlocking the closure, and keep a space between the inside pane and the inside face of the frame when the inside pane is closed. The hinge piece includes at least one plate. The inside pane is fixed at a distance from the plate by at least one fixing point spacer in such a manner that when the inside pane is in the closed position the plate engages and bears against the inside face of the frame.

Abstract: A stove comprises a combustion chamber and a window disposed at the front wall of the combustion chamber. The stove further includes a device disposed at the front wall of the combustion chamber for directing air into the combustion chamber across the inner side of the window and in a downward direction. The device can form, across the inner side of the window, a screen of air which has a width approximately equal to the width of the window. The device includes a longitudinal chamber and a longitudinal slot in flow communication with the longitudinal chamber. Disposed within the slot are: a cylindrical register which can be rotated about its longitudinal axis for controlling a flow amount of the screen of air across the window; a profiled piece having air passage openings therein; and a flexible sealing leaf engaging, on one side thereof, the cylindrical register, and on another side thereof, the profiled piece.

Abstract: A gas fueled direct vent fireplace having a firebox within which flue gases are generated includes a glass face access door for closing the front of the fireplace and facing the interior of a room within which the fireplace is located. Flue gases exit remote from the front. A first seal is positioned about the periphery of the open front of the fireplace at locations accessible to flue gases for abutting the glass. A second seal is positioned about the periphery of the glass outwardly of the first seal so that only flue gases which leak past the first seal may contact the second seal. The first seal is formed from fiberglass which has high temperature characteristics. The second seal is formed from a silicone elastomeric material. With this arrangement leakage of hot gases into the adjoining room is substantially eliminated and the life of the elastomeric seal may be extended indefinitely relative to that of the prior art.