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  2. Pilot light - Wikipedia

    en.wikipedia.org/wiki/Pilot_light

    In natural gas furnaces, water heaters, and room heating systems, a safety cut-off switch is normally included so that the gas supply to the pilot and heating system is shut off by an electrically operated valve if the pilot light goes out. This cut-off switch usually detects the pilot light in one of several ways: A flame rectification device. [2]

  3. Heat trap - Wikipedia

    en.wikipedia.org/wiki/Heat_trap

    Heat traps are valves or loops of pipe on the cold water inlet and hot water outlet of water heaters. The heat traps allow cold water to flow into the water heater tank, but prevent unwanted natural convection and heated water to flow out of the tank. [1] [2] Newer water heaters have built-in heat traps.

  4. Title 43 of the Code of Federal Regulations - Wikipedia

    en.wikipedia.org/wiki/Title_43_of_the_Code_of...

    Title 43 is the principal set of rules and regulations issued by federal agencies of the United States regarding public lands under the jurisdiction of the Department of the Interior. It is available in digital and printed form, and can be referenced online using the Electronic Code of Federal Regulations (e-CFR).

  5. Thermocouple - Wikipedia

    en.wikipedia.org/wiki/Thermocouple

    Some combined main burner and pilot gas valves (mainly by Honeywell) reduce the power demand to within the range of a single universal thermocouple heated by a pilot (25 mV open circuit falling by half with the coil connected to a 10–12 mV, 0.2–0.25 A source, typically) by sizing the coil to be able to hold the valve open against a light ...

  6. Ground source heat pump - Wikipedia

    en.wikipedia.org/wiki/Ground_source_heat_pump

    A heat pump in combination with heat and cold storage. A ground source heat pump (also geothermal heat pump) is a heating/cooling system for buildings that use a type of heat pump to transfer heat to or from the ground, taking advantage of the relative constancy of temperatures of the earth through the seasons.

  7. Resilience (engineering and construction) - Wikipedia

    en.wikipedia.org/wiki/Resilience_(engineering...

    A home in Gilchrist, Texas, designed to resist flood waters survived Hurricane Ike in 2008.. In the fields of engineering and construction, resilience is the ability to absorb or avoid damage without suffering complete failure and is an objective of design, maintenance and restoration for buildings and infrastructure, as well as communities.

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