A gas furnace includes a mixing pipe through which a mixture formed by mixing fuel gas and air flows; a burner assembly that generates combustion gas by burning the mixture that passed through the mixing pipe; and a heat exchanger through which the combustion gas flows. In this case, the burner assembly includes a burner in which flame generated when the mixture is burned is seated; and a mixing chamber that mediates delivery of the mixture from the mixing pipe to the burner, thereby significantly reducing NOx emission.

A hot gas generation device with which a gas flow, for example, an air flow, is heated. This device is used for heating an edge band or another coating material, in particular an adhesive layer provided on this coating material. In this way, the coating material is prepared for being applied to a (wooden) work piece, which may, for example, be plate-shaped.

A column-conditioning enclosure includes a column chamber adapted to hold one or more chromatography separation columns. A duct system provides an airflow path around the column chamber such that the one or more chromatography separation columns held within the column chamber are isolated from the airflow path. An air mover disposed in the airflow path generates a flow of air within the duct system. A heat exchanger system disposed in the airflow path near the air to exchange heat with the air as the air flows past the heat exchanger system. The air circulates through the duct system around the column chamber, convectively exchanging heat with the column chamber to produce a thermally conditioned environment for the one or more chromatography separation columns held within the column chamber.

A heat extractor captures and separates the heat and the carbon monoxide from waste energy that is expelled from the furnace as an unusable bi-product. The heat extractor includes a core assembly, a furnace flue pipe inlet, and a furnace flue pipe outlet. The heat extractor is secured within a return air duct of the furnace, while a furnace outlet is connected to the furnace flue pipe inlet and the furnace flue pipe outlet is connected to a chimney outlet. When the furnace is operating, the hot exhaust passes through the heat extractor on its way to the chimney outlet. Within the return air duct there is a heat exchange from the heat extractor to the return cool air, thereby preheating the cool air just before it enters the furnace causing less consumption of energy to heat that air while the carbon monoxide harmlessly passes through the chimney outlet.

A heat extractor captures and separates the heat and the carbon monoxide from waste energy that is expelled from the furnace as an unusable bi-product. The heat extractor includes a core assembly, a furnace flue pipe inlet, and a furnace flue pipe outlet. The heat extractor is secured within a return air duct of the furnace, while a furnace outlet is connected to the furnace flue pipe inlet and the furnace flue pipe outlet is connected to a chimney outlet. When the furnace is operating, the hot exhaust passes through the heat extractor on its way to the chimney outlet. Within the return air duct there is a heat exchange from the heat extractor to the return cool air, thereby preheating the cool air just before it enters the furnace causing less consumption of energy to heat that air while the carbon monoxide harmlessly passes through the chimney outlet.

An air heating apparatus may comprise a housing with a path through an interior of the housing between openings in the housing. An isolating wall may divide the interior into primary and secondary chambers, and may have a transfer opening through which the path extends from the primary to secondary chambers. An air heating assembly may comprise an engine in the primary chamber, a heat generator in the primary chamber and connected to the engine, and a main heat exchanger in the secondary chamber and in fluid communication with the heat generator to transfer heat generated by the heat generator to air flowing along the path. The apparatus may include an air movement assembly configured to move air along the path and comprises a primary fan between the primary and secondary chambers to move air from the primary chamber to the secondary chamber.

An air heating apparatus may comprise a housing with a path through an interior of the housing between openings in the housing. An isolating wall may divide the interior into primary and secondary chambers, and may have a transfer opening through which the path extends from the primary to secondary chambers. An air heating assembly may comprise an engine in the primary chamber, a heat generator in the primary chamber and connected to the engine, and a main heat exchanger in the secondary chamber and in fluid communication with the heat generator to transfer heat generated by the heat generator to air flowing along the path. The apparatus may include an air movement assembly configured to move air along the path and comprises a primary fan between the primary and secondary chambers to move air from the primary chamber to the secondary chamber.

The present invention is directed to a heat and energy recovery assembly, system and method. The heat and energy recovery assembly and system may include an insulated chamber for effectuating heat and energy exchange between a primary heat recovery exchanger and the reaction products of fossil fuel combustion gases, waste products, and air. The heat and energy recovery assembly and system are particularly useful on furnace systems.

A heat exchanger arrangement, especially for a vehicle heater, includes a pot-like heat exchanger housing (12) with an inner wall (22, 24) and with an outer wall (18, 20). A heat carrier medium flow space is formed between the inner wall (22, 24) and the outer wall (18, 20). A first flow opening (54) is provided on the outer wall (18, 20) and, adjoining this, a pump housing (58) made integrally with the outer wall (18, 20) for a heat carrier medium pump is provided.

Example embodiments of the present disclosure relate to an assembly for sealing a rigid pipe, a furnace, and a gasket for use in an HVAC fluid conduit. Some embodiments include a furnace with an inducer blower drawing combustion air through the furnace, and the assembly is used to connect one or more flue conduit(s) and an exhaust pipe. In one embodiment, the gasket used in the assembly includes a tubular body, at least a portion of which is engaged along an inner surface of the fluid conduit, a rim extending outwardly from a tubular body end, and two or more ears extending from the rim, wherein the ears are spaced apart from the tubular body and extend in substantially the same direction as the tubular body. The ears further include a first rib located proximate a distal end of the ear.