Abstract: An air control regulator regulates the amount of air flowing into the inlet of a combustion chamber by causing flowing air to support a disc located in the air passage against the force of gravity. Air passes around the edges of the disc and is channeled into a plurality of airflows by ovoid depressions in the inner surfaces of the regulator forming a venturi chamber. By regulating the airflow into the combustion chamber, combustion efficiency is improved.

Abstract: A method to regulate overfire air passing through an overfire air duct and entering a flue gas stream in a combustion system including: directing overfire air into an inlet of the overfire air duct, passing the overfire air through the duct and discharging the overfire air into the flue gas stream in the combustion system; adjusting a flow rate of overfire air entering the inlet using a damper adjacent the inlet, and moving the damper parallel along an axis of the overfire air duct to increase and decrease the overfire air entering the inlet, wherein the damper has an open position at which the damper is extended out of the inlet and a closed position in which the damper is substantially in the inlet and blocking air entering the inlet.

Abstract: An air control regulator regulates the amount of air flowing into the inlet of a combustion chamber by causing flowing air to support a disc located in the air passage against the force of gravity. Air passes around the edges of the disc and is channeled into a plurality of airflows by ovoid depressions in the inner surfaces of the regulator forming a venturi chamber. By regulating the airflow into the combustion chamber, combustion efficiency is improved.

Abstract: A damper and overfire air duct in a combustion system having a combustion structure defining a flue gas passage, the damper and overfire air duct including: an inlet to the overfire air duct and an outlet to the duct discharging overfire air into the flue gas passage, and the damper aligned with an axis of the overfire air duct, and having an open position axially distal to the inlet and a closed position at least partially in the inlet and duct, wherein the damper is movable axially between the open and closed positions.

Abstract: A control system and method for a wood stove adjustably operates in accordance with operational characteristics of the wood stove. The system operates air vents to the combustion chamber of the stove to control operating temperatures of the stove. The air vents are adjusted proportionally to changes in temperature of the stove. The temperature of the stove may be controlled to achieve desired operational and burn characteristics. The system further includes a heat exchange fan. The system controls the speed of the heat exchange fan based upon the operational characteristics of the stove.

Abstract: A vented wood or gas-log fireplace is formed from a sheet metal member bent to form side and rear panels. A pair of spaced apart sheet metal plates are connected between the side panels and have rear edges spaced from the rear panel. The rear edges of the plates are bent to form lips extending in a direction toward the opposite plate. Bracket members are secured to the plates adjacent the side panels. A rear refractory member is positioned between the plates in engagement with the lips, and side refractory panels are positioned in abutment with a respective side sheet metal panel and held in place by the bracket members, the side ceramic panels abutting the rear ceramic panel at the sides thereof. A top panel is fastened to the top edges of the side panels above the top plate and a conduit extends through the top plate with the top panel to communicate the combustion chamber with an exhaust pipe or chimney.

Abstract: A fireplace has a firebox with a controllable outside air vent to provide a source of cooler air for mixing with and modulating the temperature of the air heated by the fireplace. The air vent is vertically formed between a combustion chamber and a surrounding shell so that a convective current causes the air to flow therethrough and pass over the top surface of the combustion chamber to keep it cooler than otherwise possible with heated room air. Convective currents in another air duct formed between the shell and the combustion chamber circulates room air around the combustion chamber to transfer heat to the room air. The warmed outside air and room air mixes in a plenum above the fireplace prior to entering the room, thereby modulating the temperature of the heated air and permitting it to burn without excessively heating the room. A damper regulates the flow of outside air into the air vent, as desired.

Abstract: A fireplace heat exchanger that includes an air blower unit having an input for drawing air into the air blower unit and an output for expelling air from the air blower unit; a heat exchange unit, in airflow connection with the output of the air blower unit, having at least four heat exchange sections and an airflow passageway running through the at least four heat exchange sections and terminating in a heat exchange output port; at least one log retainer extending outwardly from an upper surface of the heat exchange unit; a heated air discharge manifold having a manifold chamber in airflow communication with the heat exchange output port of the heat exchange unit, an elongated air discharge vent formed through a front manifold surface thereof and two spaced manifold bolts extending from the front manifold surface thereof; a combination vent restricting and directing assembly that includes a pivoting deflecting panel, left and right deflecting panel supports extending from a U-shaped base plate having two par

Abstract: An unvented gas-log fireplace is formed from a sheet metal member bent to form side and rear panels. A pair of spaced apart sheet metal plates are connected between the side panels and have rear edges spaced from the rear panel. The rear edges of the plates are bent to form lips extending in a direction toward the opposite plate. Bracket members are secured to the plates adjacent the side panels. A rear refractory member is positioned between the plates in engagement with the lips, and side refractory panels are positioned in abutment with a respective side sheet metal panel and held in place by the bracket members, the side ceramic panels abutting the rear ceramic panel at the sides thereof.

Abstract: A fireplace furnace heating system for a structure having a firebox for combustion of fuel, preferably coal. A heating unit is disposed proximately to, and preferably surrounds the firebox. Conduits carry interior air from remote locations to the heating unit. The heating unit is preferably a multi-walled, chambered structure to define numerous air passageways. Air delivered from the conduits to the heating unit must travel through the air passageways. The proximate disposition of the heating unit to the firebox heats the heating unit and the air travelling therethrough. The heating unit has vents for returning the heated air to the interior of the structure. A blower is included for forcible moving the air through the heating unit and back to the interior. Conduits are also provided for supplying fresh air from the exterior to the firebox to fully combust fuel in the firebox. A motorized blower is included to forcibly move the combustion air. Also included is a tempering tank for storing water.

Abstract: An insertable gas conversion unit for insertion into existing wood burning fireplaces comprises an insertable gas fireplace conversion unit having a fire box combustion chamber and a gas burner mounted therein. The combustion chamber is covered with a decorative glass door. The conversion unit comprises a first coupling unit which is connected to the chimney of the exhaust outlet of the existing fireplace and further comprises a second coupling unit which is connected to the exhaust gas outlet of said fire box of said conversion unit. Said first and second coupling units telescopically fit one into the other during the assembly and insertion of the gas fireplace unit in the existing wood burning fireplace so as to provide a gas fireplace conversion of a wood burning fireplace without requiring any custom fitting or parts.

Abstract: A draft operated fireplace insert may be used to circulate heated air from one room to another or from the exterior of a building into the interior. The fireplace insert is fitted so that a set of louvers are located over a ventilated ash pit of the fireplace, permitting air to be selectively introduced into the combustion zone of the fireplace. Air is circulated through a channel extending beneath a floor plate and behind a rear plate of the fireplace insert. Alternately, air is drawn through fuel-supporting hollow andirons extending beween the floor plate and the rear plate. A vertically shiftable damper plate controls the flow of air through the channel and the andirons.