Abstract: A water heater having an insulated water tank with a cold water inlet line, a hot water outlet line and a baffled flue pipe extending vertically through the tank is provided. The flue pipe extends from a combustion chamber housing a burner located beneath the tank, to a flue gas collection chamber positioned above the tank. The collection chamber is in fluid communicatioon with a blower and a flue gas exhaust line for conveying the flue gases through the exhaust line to a direct through-the-wall vent. Control apparatus is provided for sensing the temperature of the water in the tank and controlling the amount of fuel supplied to the burner in response thereto. The control apparatus turns on the blower when fuel is being supplied to the burner and turns off the blower when no fuel is being supplied to the burner.

Abstract: A water heater having an insulated water tank with a cold water inlet line, a hot water outlet line and a baffled flue pipe extending vertically through the tank is provided. The flue pipe extends from a combustion chamber housing a burner located beneath the tank, to a flue gas collection chamber positioned above the tank. The collection chamber is in fluid communication with a blower and a flue gas exhaust line for conveying the flue gases through the exhaust line to a direct through-the-wall vent. Control apparatus is provided for sensing the temperature of the water in the tank and controlling the amount of fuel supplied to the burner in response thereto. The control apparatus turns on the blower when fuel is being supplied to the burner and turns off the blower when no fuel is being supplied to the burner.

Abstract: A fuel heated hot water storage tank with a water filled annular space (33) is disposed in a case (1). The center of the annular space is provided by a flame tube (5), which is heated with the waste gases of a burner. An annular heating space (10) for water of a heating system is disposed between the flame tube (5) and the inner wall (28) of the water container (33). The annular heating space (10) is formed as a double annular space in the shape of a U, where the two arms (11, 12) of the U are connected to each other in the lower region (34) via a redirection connection (14). A further annular space (26) is provided between the outer annular space (12) of the double annular space (10) at a heat insulating distance (27) from the outer annular space and the further annular space is located in a heat conducting connection to the water filled annular space (33). The heat insulating distance can be provided as a third annular space (27).

Abstract: An fuel-fired hot water furnace includes the use of an improved combustion chamber, heat exchanger and breaching damper, and further includes utilizing the water heated in the furnace as the means of heating a separate domestic supply of water directed through a side car hot water heater in fluid communication with the furnace. The improved combustion chamber includes a primary combustion cylinder which is orthogonally attached to a secondary combustion cylinder, and the secondary combustion cylinder is provided with a necked-down discharge so as to facilitate a thorough burning of a fuel and air mixture. The heat exchanger includes a primary rise and fall arrangement for the combustion gases so as to provide for maximum heating of the water within the heat exchanger prior to the gases being emitted outwardly from the furnace through a breaching tube, and the breaching damper is provided within the breaching tube so as to regulate the rate of combustion gas flow.

Abstract: A safety boiler with high efficiency comprises a plurality of water jackets disposed around a central vaporizing chamber positioned atop on a combustion chamber and a plurality of sandwiched flues each respectively partitioned between each two neighboring water jackets so that the feed water passing the water jackets will be thoroughly preheated to increase the thermal efficiency and safety of the boiler.

Abstract: A helical coil of tubing is disposed in a cylindrical tank in spaced relation thereto so as to act as a baffle for the products of combustion introduced thereinto by creating a tortuous passageway in said tank. The helical coil has its end portions arranged in spaced parallel sections defining supporting skids extending longitudinally of the helical coil and thereby supporting the same in said tank. The tank is positioned in a secondary larger cylindrical tank and the fluid to be heated, such as oil, is circulated through the helical coil, the skid-like communicating portions thereof forming the supports and in the area between the tanks to obtain a highly efficient heat transfer.

Abstract: A water heater having an insulated water tank with a cold water inlet line, a hot water outlet line and a baffled flue pipe extending vertically through the tank is provided. The flue pipe extends from a combustion chamber housing a burner located beneath the tank, to a flue gas collection chamber positioned above the tank. The collection chamber is in fluid communication with a blower and a flue gas exhaust line for conveying the flue gases through the exhaust line to a direct through-the-wall vent. Control apparatus is provided for sensing the temperature of the water in the tank and controlling the amount of fuel supplied to the burner in response thereto. The control apparatus turns on the blower when fuel is being supplied to the burner and turns off the blower when no fuel is being supplied to the burner.