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  2. Register (air and heating) - Wikipedia

    en.wikipedia.org/wiki/Register_(air_and_heating)

    A floor register. A register is a grille with moving parts, capable of being opened and closed and the air flow directed, which is part of a building's heating, ventilation, and air conditioning (HVAC) system.

  3. Vacuum furnace - Wikipedia

    en.wikipedia.org/wiki/Vacuum_furnace

    Operating a vacuum heat treating furnace, c. 1959–1962. A vacuum furnace is a type of furnace in which the product in the furnace is surrounded by a vacuum during processing. The absence of air or other gases prevents oxidation, heat loss from the product through convection, and removes a source of contamination.

  4. Forced-air - Wikipedia

    en.wikipedia.org/wiki/Forced-air

    Requires less energy than electric resistance heating and possibly more efficient than fossil fuel fired furnaces (gas/oil/coal). Air source types may not be suitable for cold climates unless used with backup (secondary) source of heat. Newer models may still provide heat when coping with temperatures below 0 °C (32 °F).

  5. Heat exchanger - Wikipedia

    en.wikipedia.org/wiki/Heat_exchanger

    Tubular heat exchanger Partial view into inlet plenum of shell and tube heat exchanger of a refrigerant based chiller for providing air-conditioning to a building. A heat exchanger is a system used to transfer heat between a source and a working fluid.

  6. Electric arc furnace - Wikipedia

    en.wikipedia.org/wiki/Electric_arc_furnace

    An electric arc furnace (EAF) is a furnace that heats material by means of an electric arc. Industrial arc furnaces range in size from small units of approximately one-tonne capacity (used in foundries for producing cast iron products) up to about 400-tonne units used for secondary steelmaking.

  7. Water heating - Wikipedia

    en.wikipedia.org/wiki/Water_heating

    Gas furnace (top) and storage water heater (bottom) (Germany) In household and commercial usage, most North American and Southern Asian water heaters are the tank type, also called storage water heaters. These consist of a cylindrical vessel or container that keeps water continuously hot and ready to use.

  8. Plumbing - Wikipedia

    en.wikipedia.org/wiki/Plumbing

    Plastic pipe is in wide use for domestic water supply and drain-waste-vent (DWV) pipe. Principal types include: Polyvinyl chloride (PVC) was produced experimentally in the 19th century but did not become practical to manufacture until 1926, when Waldo Semon of BF Goodrich Co. developed a method to plasticize PVC, making it easier to process.

  9. Solar water heating - Wikipedia

    en.wikipedia.org/wiki/Solar_water_heating

    Since two flat glass sheets are generally not strong enough to withstand a vacuum, the vacuum is created between two concentric tubes. The inner tube is coated with a thermal absorber. [ 33 ] Vacuum life varies from collector to collector, from 5 years to 15 years.

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