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  2. Flue - Wikipedia

    en.wikipedia.org/wiki/Flue

    A flue is a duct, pipe, or opening in a chimney for conveying exhaust gases from a fireplace, furnace, water heater, boiler, or generator to the outdoors. Historically the term flue meant the chimney itself. [1] In the United States, they are also known as vents for boilers and as breeching for water heaters and modern

  3. Duct leakage testing - Wikipedia

    en.wikipedia.org/wiki/Duct_leakage_testing

    As air is delivered into the ductwork, pressure builds and forces air out of all of the openings in the various ductwork connections or through the seams and joints of the furnace or air-conditioner. The tighter the ductwork system (e.g. fewer holes), the less air is needed from the fan to create a change in the ductwork pressure.

  4. 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.

  5. Furnace (central heating) - Wikipedia

    en.wikipedia.org/wiki/Furnace_(central_heating)

    A condensing gas furnace includes a sealed combustion area, combustion draft inducer and a secondary heat exchanger. The primary gain in efficiency for a condensing gas furnace, as compared to a mid-efficiency forced-air or forced-draft furnace, is the capture of latent heat from the exhaust gases in the secondary heat exchanger.

  6. New York City steam system - Wikipedia

    en.wikipedia.org/wiki/New_York_City_steam_system

    Steam vapor can be caused by a leak in Con Ed's steam system or by cooler water contacting the outside of a steam pipe. [6] The vapor is often vented out through 10-foot (3.0 m) orange-and-white funnels in the street, known as stacks. Over the years, the stacks have been depicted in numerous TV shows and films. [1]

  7. Draft (boiler) - Wikipedia

    en.wikipedia.org/wiki/Draft_(boiler)

    In a water boiler, draft is the difference between atmospheric pressure and the pressure existing in the furnace or flue gas passage. [1] Draft can also be referred to as the difference in pressure in the combustion chamber area which results in the motion of the flue gases and the air flow.

  8. Plumbing - Wikipedia

    en.wikipedia.org/wiki/Plumbing

    Due to its toxicity, most cities moved away from lead water-supply piping by the 1920s in the United States, [36] although lead pipes were approved by national plumbing codes into the 1980s, [37] and lead was used in plumbing solder for drinking water until it was banned in 1986. [36] Drain and vent lines are made of plastic, steel, cast iron ...

  9. Water-tube boiler - Wikipedia

    en.wikipedia.org/wiki/Water-tube_boiler

    A high pressure watertube boiler [1] (also spelled water-tube and water tube) is a type of boiler in which water circulates in tubes heated externally by fire. Fuel is burned inside the furnace, creating hot gas which boils water in the steam-generating tubes.

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