Abstract: A heat cycling apparatus and method is provided for heating at least two chambers utilizing a pressurized heat source. The heated air is directed first to one chamber and then to the other on a predetermined repetitive time cycle.

Abstract: The invention relates to the conversion of a substantially conventional gas fired furnace utilizing two or more of the clam shell-type heat exchanger cells, which is modified by converting one cell to a final stage counterflow heat exchanger for the hot gases of combustion, which modification incorporates directing the gases of combustion from the fired cells in a counterflow path through the non-fired cell by utilizing a positive displacement fan and then exhausting the gases of combustion. The modification eliminates the need for positive venting, while substantially increasing the operational efficiency of the furnace unit. The normal flue gas temperature in this type of furnace will be about 450.degree. F., while with the modification, the temperature will be reduced to less than about 200.degree. F. and efficiency will be increased by greater than 10 percent.

Abstract: A warm air furnace including a plenum, a blower, heat exchanger disposed within the plenum and an air distribution chamber. The heat exchanger includes an encasement surrounding a plurality of vertically extending heat exchanger tubes. The tubes are in communication with the plenum and with the air distribution chamber. A fibrous refractory inorganic tubular flame chamber is positioned within the encasement and is partially surrounded by the vertically extending tubes. The tubes are positioned in a generally U-shaped pattern and one of the tubes contacts the flame chamber. The tubes along the sides of the pattern are interconnected by upper and lower side baffles. The baffles are vertically spaced from each other to define exhaust outlets. A rear baffle extends between the tubes along the base of the pattern. A flue extends from the encasement for exhaust of combustion gases.

Abstract: The method disclosed includes positioning a furnace disposed within a shelter outside near the building, the shelter has an inlet for receiving ambient air and an outlet for passing air heated by the furnace out of the shelter. An air duct is mounted between the shelter and an opening into the building. A solid fuel is burned within the furnace to heat the air within the shelter and the heated air is transported through the duct into the building to provide supplemental heat in the event the supply of fluid fuel is interrupted.The apparatus disclosed includes a shelter having walls with an inlet for receiving ambient air and an outlet for passing heated air out of the shelter. A furnace is disposed within the shelter for heating the air and includes a grate for supporting solid fuel to be burned and an exhaust stack extending through the walls of the shelter for carrying exhaust gases from the furnace without mixing with the air within the shelter.

Abstract: A furnace shell has a fire pot centrally located therein, the walls of the shell and fire pot being spaced to form a fluid heat transfer chamber therebetween. Heat transfer is effected between the pot and the chamber to heat the fluid medium in the chamber. The shell is located in an interior to be heated, such as a building or home, including mobile and motor homes. An inlet conduit has a first end exteriorly positioned of the building interior and a second end substantially pneumatically sealed from the interior and in fluid communication with the fire pot enclosure to provide combustion supporting fluid exclusively from the exterior. A flue has a first end positioned exteriorly of said interior and a second end positioned in the upper portion of the fire pot enclosure to conduct combustion gases to the exterior. The flue is pneumatically sealed from the interior to prevent combustion gases from entering the interior.

Abstract: A heating system utilizing a fuel bearing multi-tube water jacket having a lower header, an upper header vertically spaced from the lower header, a plurality of spaced curvilinear hollow heat exchanging tubes connecting the manifolds, and a hollow plate-like baffle connected between the manifolds. The water jacket may be positioned within a conventional fireplace for supporting burning fuel to heat fluid circulated through the heat exchanging tubes and plate-like baffle for heating areas remote from the fireplace. The water jacket may be utilized in conjunction with a heat exchanger positioned within the warm air duct of a forced air furnace. A pump for circulating fluid through the water jacket and heat exchanger, and a blower associated with the forced air furnace are operated in response to the temperature of the heated fluid.

Abstract: A closed heating system for a building particularly adapted to be installed in a conventional fireplace for supplementing the heat generated by a conventional forced air heating unit. The heating system includes a grate having a log supporting water conduit through which water passes and is heated by the logs supported thereby. The heated water is pumped through suitable valves to a heat exchanger disposed within the air duct of a conventional forced air heating system to heat the air passing therethrough. The heated water may bypass the air duct heat exchanger. The bypassed water is communicated to a coil associated with a tempering tank which is installed in the building cold water supply line that feeds the hot water heater. The hot water preheats the water supply and is then returned to a storage tank for recycling.

Abstract: An apparatus for recirculating heated air within a building. A forced air heater with a blower is positioned in the building. A collecting tank is located near the ceiling. The collecting duct has perforations for collecting heated air that has risen to the ceiling. A return duct is connected between the collecting duct and the heater intake. The heater blower draws the heated air through the collecting duct and return duct and discharges it into the room.

Abstract: A conventional forced air furnace and an auxiliary wood burning furnace are separately connected directly to hot air distribution and cold air return air ducts. Each furnace has its own air circulating blower and an automatically operable damper valve prevents each furnace from blowing hot air through the other.

Abstract: A tubular coil for circulating liquid extends upwardly at least partially the length of a chimney to absorb heat from the hot combustion gases emitted by a fuel combustion chamber in a heating furnace. This coil is connected to a heat exchange device, such as a radiating unit to supply heated fluid, such as hot air in a hot air furnace. In the principal form of the invention, the radiating unit supplied by heated fluid from the coil is positioned in the air circulated by the hot air heating system.

Abstract: A heating system for heating a confined area with an open-hearth wood-burning fireplace. A fireplace jacket is provided which comprises a multi-chambered double-walled arrangement or a grate member. Log supporting portions of the jacket slant upward slightly in order to prevent a pinging sound by creating convectional force when water is circulating therethrough. The grate member includes first and second headers formed from prisms with triangular bases, and water conducting pipe portions extending on three sides of a fire burning in the open-hearth fireplace. The fireplace jacket is readily utilizable with a conventional forced-air furnace in association with a heat exchanger disposed in the furnace cold air return. Combustion air for the fire is provided from an area external of the confined area to be heated by the heating system.

Abstract: In a building heating system having a furnace, the instant invention incorporates a furnace enclosure for spacedly enclosing the furnace, an inlet air duct for conducting fresh air to the enclosure space for supporting combustion in the furnace, a combustion products outlet duct extending from the furnace, radiant heating duct means extending from the combustion products duct in radiant heat exchange relation with building space, and flue means communicating with the radiant heating duct for exhausting flue gas.

Abstract: An improved heating system is disclosed including a heat-generating means and plenum, a conventional ducting system interconnecting the heat-generating means to one or more air discharge registers, particularly characterized in the utilization of a heat exchanger adjacent the heat-generating source and a heat exchanger adjacent the air discharge register, with said heat exchangers being interconnected by a heat-conducting tube carrying a quantity of thermally conductive liquid so as to utilize the improved conductivity of the liquid to minimize heat loss between the heat-generating source to the register. The invention discloses utilization of the heat-conducting tube either externally or internally of a conventional ducting system. Further, the tube is disclosed in a modification as being comprised of a plurality of segments interconnected by a slip-joint or sleeve which controls the transfer of heat between adjacent segments of the tubing.