A heat reclaimer mounted on an exhaust-conveying flue, the flue having a flue inside surface in contact with the exhaust, the heat reclaimer including a heat-exchange assembly adjacent to and in contact with the flue. The heat-exchange assembly includes: (a) a fan for moving ambient air; (b) a chamber through which the fan drives the ambient air, the chamber defining a primary airflow direction; and (c) a plurality of heat transfer plates inside the chamber and transverse to the primary airflow direction, the plates defining airflow openings therethrough and having at least an edge in solid-to-solid thermal contact with a flue inside surface portion inside the chamber, thereby heating the ambient air with heat from the exhaust.

A heat reclaimer mounted on an exhaust-conveying flue, the flue having a flue inside surface in contact with the exhaust, the heat reclaimer including a heat-exchange assembly adjacent to and in contact with the flue. The heat-exchange assembly includes: (a) a fan for moving ambient air; (b) a chamber through which the fan drives the ambient air, the chamber defining a primary airflow direction; and (c) a plurality of heat transfer plates inside the chamber and transverse to the primary airflow direction, the plates defining airflow openings therethrough and having at least an edge in solid-to-solid thermal contact with a flue inside surface portion inside the chamber, thereby heating the ambient air with heat from the exhaust.

A convection outdoor or indoor gas heater is provided, the heater comprising: a top; a first wall; a combustion chamber which includes a vent cap with a plurality of vents, the vent cap proximate to the top, the combustion chamber housed within the first wall, spaced apart from the first wall to define a first interstitial passageway, the first interstitial passageway in fluid communication with the plurality of vents; a gas burner assembly which is housed in the combustion chamber; a second wall spaced apart from the first wall to define a second interstitial passageway, the second interstitial passageway in fluid communication with the first interstitial passageway; a base which supports the first wall, the second wall and the combustion chamber; a combustion air inlet in fluid communication with the combustion chamber; an ambient air inlet in fluid communication with the second interstitial passageway; and an outlet in fluid communication with the first interstitial passageway.

A convection outdoor or indoor gas heater is provided, the heater comprising: a top; a first wall; a combustion chamber which includes a vent cap with a plurality of vents, the vent cap proximate to the top, the combustion chamber housed within the first wall, spaced apart from the first wall to define a first interstitial passageway, the first interstitial passageway in fluid communication with the plurality of vents; a gas burner assembly which is housed in the combustion chamber; a second wall spaced apart from the first wall to define a second interstitial passageway, the second interstitial passageway in fluid communication with the first interstitial passageway; a base which supports the first wall, the second wall and the combustion chamber; a combustion air inlet in fluid communication with the combustion chamber; an ambient air inlet in fluid communication with the second interstitial passageway; and an outlet in fluid communication with the first interstitial passageway.

An oven appliance with one or more features for controlling airflow within a cooking chamber of the oven appliance. Further, a method for operating an oven appliance to control airflow within a cooking chamber of the oven appliance. In particular, the oven includes features for and the method includes steps for dynamic control of the speed of a convection fan over an oven cycle to maintain proper airflow within the cooking chamber for cooking performance of the cooking chamber.

A double oven appliance having an upper and lower oven positioned below the upper oven along a vertical direction such that a gap is defined between a top wall of the lower oven and a bottom wall of the upper oven. A bracket having a mounting platform positioned within the gap and spaced from the top wall of the lower oven along the vertical direction. The double oven appliance further including a circuit board coupled to the mounting platform such that the circuit board may be spaced from the top wall of the lower oven along the vertical direction. Further, the circuit board may be cooled by a cooling medium flowing across the circuit board.

A hot-air blower comprises a heat lamp with a rated power consumption of 180 W to 380 W, a lampshade having a socket for the heat lamp, a cylindrical outer casing with an inner diameter larger than a largest outer diameter of the lampshade, a lampshade fixing part coupled with the lampshade and fastened to the outer casing to allow the lampshade to be provided on a central axis of the outer casing, an impeller generating an air flow by rotation, a waterproof motor coupled with the impeller to rotate the impeller, and a motor fixing part coupled with the waterproof motor.

The present document describes a multistages combustion furnace system for thermal expansion of mineral particles which comprises: a furnace having an expansion chamber for receiving the mineral particles; a burner head to be connected at a distance for an atmospheric coupling of the furnace and for operating the multistages combustion furnace system; a furnace device to be connected at a distance for an atmospheric coupling of the burner head to offset the quenching effect of ambient air normally drawn in the furnace; and a tuyere for thermal expansion of mineral particles to be connected between the expansion chamber and the furnace device; wherein the multistage combustion furnace system is to be connected with an inlet of preheated air.

An outdoor wood-burning boiler is provided that includes a wood-burning enclosure, a wood support structure, and an air supply system configured for supplying air to wood that is supported by the wood support structure. The air supply system includes conduits for carrying a flow of air. At least one conduit can extend through a sidewall of the enclosure such that an end of the conduit is located outside of the enclosure. The end can include a re-closable closure. The re-closable closure can be configured to be opened from outside of the enclosure and provide access to the interior of the conduit so the conduit can be cleaned. The end and the re-closable closure can instead be located inside the enclosure and accessible through an access panel. An air supply conduit system is also provided that can be installed after-market or as original equipment.

A convection outdoor or indoor gas heater is provided, the heater comprising: a top; a first wall; a combustion chamber which includes a vent cap with a plurality of vents, the vent cap proximate to the top, the combustion chamber housed within the first wall, spaced apart from the first wall to define a first interstitial passageway, the first interstitial passageway in fluid communication with the plurality of vents; a gas burner assembly which is housed in the combustion chamber; a second wall spaced apart from the first wall to define a second interstitial passageway, the second interstitial passageway in fluid communication with the first interstitial passageway; a base which supports the first wall, the second wall and the combustion chamber; a combustion air inlet in fluid communication with the combustion chamber; an ambient air inlet in fluid communication with the second interstitial passageway; and an outlet in fluid communication with the first interstitial passageway.