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  2. “Timestamped Pictures”: 50 Random Things People Did That ...

    www.aol.com/55-things-people-did-just-020043615.html

    It was a real gas leak in the middle of the night, glad I didn't ignore that. Old furnace was replaced immediatly and its wonderful, and costs so much less every month compared to the old rickety ...

  3. Albert Butz - Wikipedia

    en.wikipedia.org/wiki/Albert_Butz

    The damper flapper could control a coal fire furnace by operating the furnace damper from a thermostat. In 1885, Butz decided to patent his heat controller and establish a company to make and sell it. It is believed that Mendenhall urged Butz to patent, manufacture, and sell the damper flapper.

  4. Gas leak - Wikipedia

    en.wikipedia.org/wiki/Gas_leak

    Gas leaks can damage or kill plants. [4] [5] In addition to leaks from natural gas pipes, methane and other gases migrating from landfill garbage disposal sites can also cause chlorosis and necrosis in grass, weeds, or trees. [6] In some cases, leaking gas may migrate as far as 100 feet (30 m) from the source of the leak to an affected tree. [7]

  5. Reversing valve - Wikipedia

    en.wikipedia.org/wiki/Reversing_valve

    Reversing valves are built into the heat pump by the manufacturer, and must be replaced by an HVAC technician if they fail. Since the valve is an integral part of the sealed refrigerant circuit, proper procedures for recovering and then later refilling the refrigerant must be followed, to prevent its loss into the atmosphere.

  6. Lennox Recalls Natural Gas Log Sets: Valves Can Crack, Leak Gas

    www.aol.com/news/2011-03-01-lennox-recalls...

    Lennox Hearth Products LLC recalled about 3,200 of its Lennox Shadowdance Natural Gas Log Set Burner Assemblies because the valve can crack and leak natural gas, said the U.S. Consumer Product ...

  7. Nozzle and flapper - Wikipedia

    en.wikipedia.org/wiki/Nozzle_and_flapper

    The nozzle and flapper mechanism is a displacement type detector which converts mechanical movement into a pressure signal by covering the opening of a nozzle with a flat plate called the flapper. [1] This restricts fluid flow through the nozzle and generates a pressure signal.

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