Abstract: A water heater door assembly includes a seal positioned over an access opening in a water heater combustion chamber and having at least one opening through which a fuel supply line extends at least partly between a burner in the combustion chamber and a gas control valve, the seal including a pair of complementary seal pieces adjacent each other in sealing contact with at least edge portions of the access opening and in sealing contact with the fuel supply line and a retainer affixed to edge portions of the combustion chamber adjacent the access opening which sealingly holds the seal pieces over the access opening.

Abstract: A system and a method for controlling a pump in a recirculating hot water system is provided. In one embodiment, the invention relates to a method for controlling a temperature of water in a recirculating hot water system including a storage tank for storing heated water, a recirculation conduit including a supply conduit for supplying the heated water to users via a plurality of outlets having a first outlet and a last outlet and a return conduit for returning an unused portion the heated water to the storage tank, a pump for circulating the heated water, the pump disposed along the return conduit, the method including measuring, at a point along the recirculation conduit, a temperature of the heated water provided from the storage tank, and controlling a speed of the pump, disposed along the return conduit, based on the measured temperature.

Abstract: A method of storing water at two temperatures, the method comprising: providing a tank divided into first and second chambers; storing water in the first chamber at a first temperature; storing water in the second chamber at a second temperature; heating water in the second chamber when the second temperature is below a predetermined second value; pumping water from the second chamber to the first chamber when the first temperature is below a predetermined first value, the first values being less than the second value; and permitting water flow from the first chamber to the second chamber while pumping water from the second chamber to the first chamber.

Abstract: An apparatus for providing a condensing side-arm water heater with improved efficiency. The condensing side-arm element recirculates exhaust gases into heating the cooler part of a water heater tank by the thermosiphon (or buoyancy) effect in a counterflow configuration, thus increasing efficiency of the water heater.

Abstract: A boiler comprising a water jacket surrounding upper and lower combustion chambers for receiving heat for heating water or other fluid therein. The upper and lower combustion chambers are defined by a refractory structure which extends entirely across the inner casing. A vertical passage through the refractory structure provides for flow of combustion gases from the upper to lower combustion chamber. Oxygen is provided through a first forced air inlet to the upper combustion chamber for burning of wood or biomass in the upper combustion chamber. Oxygen is provided through a forced air passage in the refractory structure and opening into the vertical passage thereby providing at cast one second forced air inlet to the vertical passage for burning of the combustion gases and particulates passing therethrough from the upper combustion chamber.

Abstract: Disclosed is a boiler which is easily convertible from a normal type oil boiler to a condensing type oil boiler or vice versa thereby reducing manufacturing costs for the boiler. A size and a weight of the boiler are reduced by vertically installing a latent heat exchanger in an outer housing of the boiler together with a combustion chamber and a main heat exchanger. The boiler includes a combustion chamber, a heat exchange section, and an outer housing. Coupling holes are formed in the outer housing, a circulation chamber is formed at a lower portion of the outer housing, a burner is provided at an upper portion of the combustion chamber so as to generate heat in a downward direction thereof, the combustion chamber is vertically installed in one of the coupling holes, and a lower portion of the combustion chamber is communicated with the circulation chamber. The heat exchange section includes first and second heat exchangers and is vertically installed in the outer housing adjacent to the combustion chamber.

Abstract: A return temperature stabilizer assembly or metering means is provided for a boiler that facilitates the mixing of cooler, inlet return fluid with the heated fluid within the boiler chamber whereby the temperature striations within the boiler chamber are reduced or eliminated, and wherein the temperature stabilizer assembly is modular in design, and therefore capable of easily accommodating boilers of differing sizes.

Abstract: A steam generator and a laundry machine equipped with the same are disclosed, the steam generator according to the present invention includes a case (100) for storing water for generating steam therein; an inlet (111) provided within the case (100) for drawing water there trough; an outlet (112) provided within the case (100) for discharging steam there trough; and a water-inlet-proof-partition-wall (800) for preventing the water drawn through the inlet (111) from being discharged through the outlet (112).

Abstract: Hot water pipes, in areas with hard water, tend to fill with scale until they no longer pass enough water. De-scaling water pipes with acid is dangerous, expensive and damages the pipes. Ion exchange and reverse osmosis water softeners eliminate scale buildup in pipes, but are expensive. This invention is a means of keeping the scale precipitate, created when water is heated, inside the water heater by passing the hot water through a removal medium where the scale sticks to the surface. The removal medium can be placed inside the water heater or in a separate tank connected to the water heater; both configurations remove the precipitate from hot water; both save hot water pipes from scale accumulation.

Abstract: An energy saving apparatus is described. The energy saving apparatus is attached to a standard gas-powered water heater. All gas-powered water heaters typically have an air vent which vents hot air from the water heater. The apparatus takes advantage of this fact by routing a cold water inlet line into a heating coil wrapped around the air vent, with the heating coil eventually being connected to an outlet water line that then enters the hot water heater. The heating coil is merely a water line located in between the cold water inlet line and the outlet water line that is wrapped around the air vent many times. The heat from the air vent will transfer some of its heat to the water circulating within the heating coil, causing the hot water heater to utilize this otherwise wasted energy and subsequently causing the hot water heater to need less energy to heat the water within the hot water heater.

Abstract: A water heater unit is described for providing convective water flow through a water circulatory system. In one embodiment, the water heater unit has an outer housing, a water tank disposed within the housing, and a first cold water inlet coupled to the tank and connectable to a cold water supply line. A hot water outlet is coupled to the tank and connectable to a hot water supply line. A connection chamber adjacent to the tank has a second cold water inlet connectable to the cold water line, and a chamber outlet connected to the first cold water inlet of the tank. The connection chamber has at least one return inlet connectable to the hot water return line at a position to allow a substantially continuous flow of return hot water driven by convection forces without the benefit of a recirculation pump.

Abstract: A gas water heater is disclosed. The gas water heater comprises a combustion chamber, a pipe assembly, a heat exchange device, and a plurality of heat conductors. The combustion chamber provides a gas flow. The heat exchange device is disposed above the combustion chamber. The heat conductors are disposed in parallel in the heat exchange device. Each heat conductor comprises a body, a plurality of trough holes, and a first flange. The body has an oblique side facing the gas flow. The through holes are disposed on the body. The first flange is formed along the oblique side of the body for collecting condensed water.

Abstract: The invention concerns a heat exchanger comprising at least one helically bound bundle of tubes, whereof the thermally conductive wall has a flattened and oval cross-section, whereof the main axis is perpendicular to that (X-X?) of the helix, while the width of the interstice separating two adjacent turns is small and constant, said bundle being fixedly mounted inside a casing (1) fitted with a pipe for evacuating gases generated by a burner (6), means being provided for circulating cold water inside said bundle, said exchanger being further designed so that the hot gases pass radially through the bundle via the interstices of the turns. Said exchanger is characterized in that the casing is made of heat-resistant plastic material and means are provided for ensuring mechanical containment of the beam in the axial direction, and for damping the thrust loads resulting from the fluid internal pressure, preventing their being transmitted to the casing.

Abstract: Hot water pipes, in areas with hard water, tend to fill with scale until they no longer pass enough water. De-scaling water pipes with acid is dangerous, expensive and damages the pipes. Ion exchange and reverse osmosis water softeners eliminate scale buildup in pipes, but are expensive. This invention is a means of keeping the scale precipitate, created when water is heated, inside the water heater by passing the hot water through a removal medium where the scale sticks to the surface. The removal medium can be placed inside the water heater or in a separate tank connected to the water heater; both configurations remove the precipitate from hot water; both save hot water pipes from scale accumulation.

Abstract: The invention relates to a holding tube for a heat treatment plant using injection heating. The holding tube includes a first, fixed section consisting of a conduit of predetermined and a constant counter pressure valve. The holding tube also includes a second, adjustable section. The second, adjustable section consists of a cyclone and an inclining conduit of a predetermined length. In the inclining conduit there is disposed a device for maintaining a defined liquid level in the conduit.

Abstract: A method and apparatus for sealing a combustion intake for a boiler from inside air is provided. A method and apparatus for providing a transition piece for venting fresh air to and combusted air away from a boiler is also provided. A method of connecting a transition piece to PVC, ABS OR CPVC ductwork is also provided.

Abstract: A method and apparatus for sealing a combustion intake for a boiler from inside air is provided. A method and apparatus for providing a transition piece for venting fresh air to and combusted air away from a boiler is also provided. A method of connecting a transition piece to PVC, ABS OR CPVC ductwork is also provided.

Abstract: The act of heating water within a contained vessel that is common to most buildings, whether residential or commercial or located in recreational vehicles, mobile homes, aircraft, ships or marine pleasure craft, causes calcium carbonate to precipitate out and settle to the bottom of a heating or fluid containing vessel. The use of ultrasonic transmission within the vessel will agitate the water held within, preventing the normally stagnant hot water from producing calcium carbonate. Other benefits are the cleaning properties of ultrasonic transmission. Thus the internal parts of hot water heaters will enjoy a longer life. This benefit of agitation will also be found when applied to vessels that contain fluids that share similar problems as hot water heaters.

Abstract: A hot gas water heater has a housing, and at least a pair of concentric coils in the housing through which liquid to be heated is sequentially passed. Each coil has a helical tube with adjacent turns connected by a web member such that the tube and web member form an imperforate coil wall. Hot gas passes sequentially between the coils in co-current flow with liquid flow in one adjacent coil and counter-current flow with liquid flow in another adjacent coil.

Abstract: A process and apparatus are provided for conserving water and heat energy in a hot water supply system. A holding tank is provided near the Point Of Use to capture unwanted cooled water. An integrated displacement actuator allows this volume to be recirculated back into the hot water supply line after use. The actuator consists of a flexible bladder or rolling diaphragm that divides the holding tank into two compartments; one for non-compressible supply water, and the second for a compressible phase change fluid. At ambient temperature, the phase change fluid condenses to a liquid phase at a relatively low pressure, allowing diverted water to flow into the tank from the hot water supply system. When the phase change fluid is warmed by the adjacent hot water, it changes to a gaseous phase, pressurizing the holding tank and allowing re-injection of the cool water into the hot water supply system. A control system is provided direct water flow based on time, temperature and pressure.

Abstract: A water heater includes a storage tank communicating with a cold water supply pipe and a hot water supply pipe for the respective supply of cold water to, and removal of hot water from, the tank. The water heater also includes an insulated heat recovery module communicating between the cold water supply pipe and the tank. The heat recovery module defines a cavity, and the cold water supply pipe communicates with a lower portion of the cavity. The heat recovery module has a smaller surface area-to-volume ratio than the cold water supply pipe. When water in the tank is heated, some water is thermally displaced from the tank and into the cavity. Consequently, water is displaced out of the lower portion of the cavity and into the cold water supply pipe. Therefore, only the coldest water is displaced out of the cavity, and thermal energy loss is reduced.

Abstract: A heating system for heating liquids, stored in a tank at low ambient temperature, has a heating chamber with an inlet and an outlet for convectively flowing liquid past a flameless heater. Cold liquid is drawn through an inlet line, from the tank near its base and into a heating chamber, absorbs radiant energy from the heater as it travels therethrough. Heated liquid is circulated into the tank through an upper outlet from the heating chamber and back into the tank. Preferably, the heated liquid reenters the tank through a floating discharge flexibly connected to the upper outlet so as to remain dynamically in contact with the liquid at all times, thus avoiding airlocks which would interrupt the convective flow of liquid through the heating system.

Abstract: A baffle for slowing the incoming water flow into a booster heating tank so that the turbulence in the water tank is minimized. The baffle consists of an inner cap and outer cap which are positioned over the inlet to a water heating tank. The outer cap is spaced apart from the inner cap such that the incoming water flows through openings in the inner cap and is directed to the underside of the outer cap. The water, having been sufficiently slowed by the contact with the underside of the outer cap, then smoothly flows downward along the outer cap flange and into the main plenum of the tank.

Abstract: A heating system for heating liquids, stored in a tank at low ambient temperature, has a heating chamber with an inlet and an outlet for convectively flowing liquid past a flameless heater. Cold liquid is drawn through an inlet line, from the tank near its base and into a heating chamber, absorbs radiant energy from the heater as it travels therethrough. Heated liquid is circulated into the tank through an upper outlet from the heating chamber and back into the tank. Preferably, the heated liquid reenters the tank through a floating discharge flexibly connected to the upper outlet so as to remain dynamically in contact with the liquid at all times, thus avoiding airlocks which would interrupt the convective flow of liquid through the heating system.

Abstract: The present device relates to a combustion boiler having a fan part provided with a driving motor, a suction fan secured on a rotary shaft of the driving motor and disposed on a suction line, for forcedly sucking air in the room or from the outside, and an exhaust fan secured on the rotary shaft of the driving motor and disposed on an exhaust line, for forcedly exhausting an exhaust gas to the outside. Hence, the air in the room or from the outside is forcedly sucked to the suction line by means of the suction fan and the exhaust gas is forcedly exhausted to the exhaust line by means of the exhaust fan. In this way, the flowing of air is constantly kept in all of the suction, combustion and exhaust lines.

Abstract: A combination space and hot water heater is comprised of an inner tank having an outer casing spaced therebout with insulation being interposed between the casing and the inner tank. The inner tank has a glass-lined inner surface and a heater is provided within the inner tank for heating a same volume of water within the inner tank. An anode is provided within the inner tank. A closed water circulating circuit is connected to the inner tank for circulating hot water from the tank through heat exchange means connected in the closed water circulating circuit. Preferably, but not exclusively, the heat exchange devices are radiators.

Abstract: A baffle for slowing the incoming water flow into a booster heating tank so that the turbulence in the water tank is minimized. The baffle consists of an inner cap and outer cap which are positioned over the inlet to a water heating tank. The outer cap is spaced apart from the inner cap such that the incoming water flows through openings in the inner cap and is directed to the underside of the outer cap. The water, having been sufficiently slowed by the contact with the underside of the outer cap, then smoothly flows downward along the outer cap flange and into the main plenum of the tank.