Abstract: An apparatus and method for heating water using tankless water heater with improved rain cap.

Abstract: A fluid heater constructed of rectangular tubing through which fluid to be heated is circulated in a circuitous path. The floor and walls of a combustion chamber of the heater are constructed of the rectangular tubing. A tubular coil stack is positioned over the combustion chamber and surrounded by coil stack chamber walls constructed of the rectangular tubing. Consequently, all surfaces of the fluid heater exposed directly to flame are constantly cooled by the fluid to be heated. A combustion unit of the fluid heater is removable to facilitate maintenance.

Abstract: A water heater comprising a closed tank having a water inlet for connection with a water supply, and a hot water outlet connected to the tank interior; a flue pipe extending vertically through the tank and having an upper portion for connection with a vent pipe; a cylinder having a lower end and upper open end with means for opening disposed within the flue pipe, and spaced from inner walls of the flue pipe, and extending substantially the length of the flue pipe; a burner disposed in a lower region of the cylinder and above the lower end thereof, such that combustion products from the burner rise through the cylinder; and a water conducing coil disposed within the cylinder connected with the interior of the tank.

Abstract: An inlet is provided for delivering water into a water heater through a port in its top. The inlet includes a conduit having a distal portion that extends downwardly toward a bottom of the water heater. The inlet includes means for deflecting the water flow through openings in the inlet's wall in order to reduce the generation of temperature gradients that otherwise tend to develop within water heater tanks. A water heater assembly including such an inlet is also described.

Abstract: An apparatus for cleaning a residential water heater 10 or the like. The water heater is generally vertically disposed and has a cylindrical side wall 12, a top 14, and a bottom 16. A water supply tube 20 terminates in a nozzle 22 which permits entry of a stream of water 24 in a generally horizontal spray pattern along the bottom to flush and agitate any foreign matter 38 along the bottom. A drain cock 28 is provided within the heater side wall and opposite the nozzle, the drain cock being opened upon flushing of the bottom of the water heater so that any foreign matter is removed through the drain cock. In lieu of a simple, single-orificed nozzle, a multiple-orificed nozzle 22b or a plurality of nozzles may be provided.

Abstract: A water heater including a tank having a hot water outlet in the top portion thereof and a cold water inlet in the lower portion thereof. An agitator assembly connected to the cold water inlet and mounted in the bottom portion of the tank. The agitator assembly includes a circular tubular member having a first row of orifice members mounted along the inner side thereof, a second row of orifice members mounted along the outer side thereof and a third row of orifice members mounted along the top side thereof.

Abstract: An improved mechanism for a water heater flushing of sediment from the bottom of tank diverts inlet water through an auxiliary tube directed to the bottom of the tank. Thus, when a spigot is opened at the bottom of the tank and water is simultaneously diverted through the flush tube, sediment can efficiently be removed from the tank.

Abstract: This gas hot water heater has a storage tank with a vertical flue having an elongated tube surrounding the flue to form an inverted inner tank that is closed at its top portion while being open at its bottom portion to the storage tank. A service water inlet pipe is located at the upper portion of the storage tank to discharge cold water into the upper portion of the inner tank to flow in a swirling direction down and around the outside of the flue. This downward swirling action of the cold service water relative to the upward flow of the hot flue gases within the flue tube represents the counterflow action. A thermostatic control valve is located through the wall of the upper portion of the inverted tank so as to open the valve to the inner tank when the water temperature within the inner tank reaches a normal, predetermined high temperature at a stand-by mode when no hot water is being drawn. Hence, the control valve is normally-open during high temperature stand-by conditions.

Abstract: An apparatus for cleaning a residential water heater 10 or the like without the need for draining and re-filling the tank. The water heater is generally vertically disposed and has a cylindrical side wall 12, a top 14, and a bottom 16. A water supply tube 20 terminates in a nozzle 22 which permits entry of a stream of water 24 in a generally horizontal spray pattern along the bottom to flush and agitate any foreign matter 38 along the bottom. A drain cock 28 is provided within the heater side wall and opposite the nozzle, the drain cock being opened upon flushing of the bottom of the water heater so that any foreign matter is removed through the drain cock. In lieu of a simple, single-orificed nozzle, a multiple-orifices nozzle 22b or a plurality of nozzles may be provided.

Abstract: The present disclosure is related to a structural improvement in the burning chamber of a horizontal boiler, adopting a hollow flame-conducting element therein, which is attached with a pair of parallelly spirally fixed heat-convecting fins for either increasing the heat-absorbing area subjected to the emitted flame from the flame-generating device or creating a whirlpool effect for the propagating flame so that the flame can come into contact with the wall of the burning chamber in a more ideal way and change its propagating direction more smoothly at the corner, resulting in an increase in the thermal efficiency of the boiler, in such a manner that energy consumption as well as a pollution problem can be alleviated greatly.

Abstract: A reduced wreath condensation boiler. A feed duct for fresh oxygen-carrying air taken from the atmosphere and an exhaust duct for exhausting diluted combustion products to the atmosphere downstream from the extractor fan are essentially parallel, but not coaxial, minimizing heat exchange. A first heat exchanger is disposed above the heating body for providing heat exchange between the fresh air from the feed duct and the combustion products from the heating body prior to dilution. Deflectors channel a portion of the air from said first heat exchanger to sweep the free space situated between the heating body and its airtight enclosure, while the remainder of the air from the first heat exchanger is directed towards the burner. At least one calibrated orifice injects the air which has swept over the heating body into the exhaust duct for the combustion products upstream from the extractor fan. This boiler reduces the wreath of water vapor where the flue gases are exhausted to the atmosphere.

Abstract: A water heater having a magnetic device connected to a source of water under pressure and to the water heater inlet. The magnetic device includes a plurality of permanent magnet members mounted on a tube. Water flowing thru the tube to the water heater inlet will flow thru the magnetic lines of force produced by the permanent magnet members. An agitator assembly is mounted in the bottom portion of the tank and includes a ring-shaped tubular member and a secondary tubular member connected to the ring-shaped tube. The ring-shaped member is provided with a plurality of openings in the sides thereof and the secondary tubular member is provided with an upwardly facing opening therein. The agitator assembly is connected to the magnetic device so that when hot water is periodically withdrawn from the top of the tank, water will flow into the tank from the magnetic device and then out thru the openings in the agitator assembly to produce a stirring action in the bottom of the tank.

Abstract: A water heater including a water tight tank and a source of heat for heating water inside the tank. A hot water outlet is located in the top of the tank. An inlet agitator tube is mounted in the tank. The tube includes a straight vertical portion, a first curved portion lying in a vertical plane and a second curved portion lying in a horizontal plane adjacent the bottom of the tank. The second curved portion has a plurality of openings in the underside thereof through which streams of water will be directed into the tank each time water is drawn out of the top of the tank, said streams of water serving to agitate the water in the bottom of the tank to prevent accumulation of sediment therein.

Abstract: A water heater including a watertight tank having a source of heat for heating water inside the tank and a hot water outlet mounted in the top portion of the tank. An agitator assembly is mounted in the bottom portion of the tank and includes a ring-shaped tubular member and a secondary tubular member connected to the ring-shaped tube. The ring-shaped member is provided with a plurality of openings in the sides thereof and said secondary tubular member is provided with an upwardly facing opening therein. A plurality of horizontally extending venturi fittings are mounted in the ring-shaped member side openings and an upwardly extending venturi fitting is mounted in the secondary tubular member opening. The agitator assembly is connected to a source of water so that when hot water is periodically withdrawn from the top of the tank water will flow into the tank through the openings and venturi fittings in the agitator assembly.

Abstract: A water heater including a watertight tank having a plurality of flue tubes extending between the tank bottom and the tank top and having a burner means mounted beneath the tank and a hot water outlet mounted in the top portion of the tank. An agitator assembly is mounted in the bottom portion of the tank and includes a ring-shaped tubular member and a secondary tubular member connected to the ring-shaped tube. The ring-shaped and secondary tubular members are provided with a plurality of openings in the sides thereof. The agitator assembly is connected to a source of water so that when hot water is periodically withdrawn from the top of the tank water will flow into the tank through the openings in the agitator assembly. Such openings are positioned so that water flowing from inside the tubular members into the tank will flow in a number of different horizontal directions to thereby produce a substantially uniform stirring action in the bottom portion of the tank.