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  2. Forced-air gas - Wikipedia

    en.wikipedia.org/wiki/Forced-air_gas

    Gas-fired forced-air furnaces have a burner in the furnace fueled by natural gas. A blower forces cold air through a heat exchanger and then through duct-work that distributes the hot air through the building. [ 2] Each room has an outlet from the duct system, often mounted in the floor or low on the wall – some rooms will also have an ...

  3. Gas heater - Wikipedia

    en.wikipedia.org/wiki/Gas_heater

    Gas heater. A wall mounted gas heater that runs on either propane or natural gas. A gas heater is a space heater used to heat a room or outdoor area by burning natural gas, liquefied petroleum gas, propane, or butane . Indoor household gas heaters can be broadly categorized in one of two ways: flued or non-flued, or vented and unvented .

  4. Salamander heater - Wikipedia

    en.wikipedia.org/wiki/Salamander_heater

    A salamander heater is any of a variety of portable forced-air or convection space heaters, often using kerosene or propane as fuel but also requiring electricity, [1][2] used in ventilated areas for worksite comfort. Salamander heaters are most often found at construction sites. [3] Depending on style, they can also be referred to as "torpedo ...

  5. New efficiency standards for home furnaces unveiled [Video] - AOL

    www.aol.com/news/biden-administration-unveils...

    (Canada has already required condensing furnaces for residential heating for over a decade.) Close-up of flames on a natural gas furnace burner in the HVAC system of a suburban home in San Ramon ...

  6. Propane - Wikipedia

    en.wikipedia.org/wiki/Propane

    A 20 lb (9.1 kg) steel propane cylinder. This cylinder is fitted with an overfill prevention device (OPD) valve, as evidenced by the trilobular handwheel. Propane (/ ˈproʊpeɪn /) is a three- carbon alkane with the molecular formula C3H8. It is a gas at standard temperature and pressure, but compressible to a transportable liquid.

  7. Annual fuel utilization efficiency - Wikipedia

    en.wikipedia.org/wiki/Annual_fuel_utilization...

    The annual fuel utilization efficiency (AFUE; pronounced 'A'-'Few' or 'A'-'F'-'U'-'E') is a thermal efficiency measure of space-heating furnaces and boilers.The AFUE differs from the true 'thermal efficiency' in that it is not a steady-state, peak measure of conversion efficiency, but instead attempts to represent the actual, season-long, average efficiency of that piece of equipment ...

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