Apparatus for pre-heating water prior to the water entering a conventional water heater including a heat exchanger means located in the attic of a residential dwelling for effecting a heat exchange between a hot air in the attic and water flowing through the heat exchanger, the heat exchanger having an inlet for receiving tap water and outlet for discharging heated tap water, and a water heater connected to the outlet of the heat exchanger for receiving heated water from the heat exchanger and f...

A heater, especially a fuel-operated vehicle heater, is provided with a cylindrical insert that supports the flame in a combustion pipe delimiting the combustion chamber of the heater. The insert is arranged in such a way that an annular space is formed between the inside wall of the combustion pipe and the outer wall of the insert by the insert being located concentrically in the combustion pipe so as to project into the combustion chamber. This insert permits a concentration of the flame in th...

A batch processing chamber comprising a top plate having at least one opening, and sidewalls, wherein the sidewalls and the top plate define a process volume. At least one removable heater is generally disposed in the process volume, wherein the at least one removable heater can be inserted or removed from the at least one opening of the top plate. In one embodiment, the at least one removable heater is resistive heater constructed in ceramic. In another embodiment, at least one heater container...

The water heater includes a burner and a water tank. Combustion products flow upwardly around the tank through a combustion products path where heat transfer to water in the tank occurs, the path being defined between the outer wall of the tank and a surrounding heat exchanger wall. The combustion products pass through outlet at the upper end of wall, and enter the flue which includes a down flow passage and then pass out through discharge outlet. The down flow passage is defined between a flue ...

A resistance heater 10 for a liquid system, in particular a fuel system of a diesel engine, in which a heating element 13 is connected to at least two contact rods 12a, 12b. Terminals are provided on the contact rods 12a, 12b so that they can receive an electric voltage. In addition, a sensor 24 is provided with which at least one parameter in the liquid system can be detected, and the sensor 24 is connected accordingly to at least one analyzer unit 18.

A ceramics heater comprises a circular heater plate formed of aluminum nitride and a metal foil heater wire formed of a high-melting metal and having a thickness of 100 .mu.m to 175 .mu.m. The heater wire is embedded in the heater plate. The heater wire has an inside portion located near the center of the heater plate and formed in zigzags at first pitches in the circumferential direction of the heater plate and an outside portion located near the outer periphery of the heater plate and formed i...

A portable heater of the type having a housing containing an internal fan and heating element to force heated air out of a blower opening is disclosed herein. The heater housing includes a plurality of foot-operable, push-button switches mounted on an outlet face, and the housing is of a horizontally stable configuration. A fulcrum, which also may be utilized as a carrying handle, is also disclosed to assist in foot-operation of the switches, and an angled outlet face is disclosed to direct heat...

A manifold for supplying hot water to a heater such as a towel holder has a tubular outer body for mounting in a generally vertical disposition. The upper end of the outer body is closed off and an inner tube is mounted within the outer body, to communicate therewith at or adjacent the upper end. First and second connectors for first and second external pipes leading to the heater communicate with the interior of the outer body. An electrically-powered immersion heater is disposed within the inn...

A fluid heater having a first heat exchanger block with a fluid heating tube encased therein, and having a first surface, a second heat exchanger block with a fluid heating tube encased therein and having a second surface adjacent to the first surface. A cavity is formed in the surface of the first block, or, alternatively, formed in each of the surfaces of the first and second blocks. A heating element is positioned within the cavity and completely encapsulated by the first and second blocks. T...

A liquid heater comprising a plurality of storage compartments for containing liquid to be heated. The storage compartments being connected together in series and comprising at least a first end compartment for receiving liquid to be heated and a second end compartment from which heated liquid can be drawn. A heating means is provided in each compartment for heating the liquid contained therein. A first flow control means is operable to allow liquid in one compartment to flow into the next compa...