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  3. Nonlinear control - Wikipedia

    en.wikipedia.org/wiki/Nonlinear_control

    Therefore, the furnace is off until the temperature falls below the "turn on" setpoint of the thermostat, when it turns on. Due to the heat added by the furnace, the temperature increases until it reaches the "turn off" setpoint of the thermostat, which turns the furnace off, and the cycle repeats.

  4. Furnace (central heating) - Wikipedia

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

    The second category of furnace is the forced-air having atmospheric burner style with a cast-iron or sectional steel heat exchanger. Through the 1950s and 1960s, this style of furnace was used to replace the big, natural draft systems, and was sometimes installed on the existing gravity duct work.

  5. List of ovens - Wikipedia

    en.wikipedia.org/wiki/List_of_ovens

    A type of furnace used for thermal processing. They are used in numerous production and laboratory applications. Burn-in ovens: Clean process oven: Flame broiler: Industrial oven: Pictured is an industrial convection oven used in the manufacture of aircraft components Heat tunnel: Reach-in oven: Walk-in/Truck-in ovens: Spiral ovens

  6. Afraid of hypothermia, icy roads? How to stay safe during ...

    www.aol.com/afraid-hypothermia-icy-roads-stay...

    Turn on the engine for 10 minutes an hour, using the heater, but make sure the exhaust pipe is clear of snow and a down wind window is open for ventilation. Do light exercises to keep extremities ...

  7. Heating, ventilation, and air conditioning - Wikipedia

    en.wikipedia.org/wiki/Heating,_ventilation,_and...

    Such a system contains a boiler, furnace, or heat pump to heat water, steam, or air in a central location such as a furnace room in a home, or a mechanical room in a large building. The heat can be transferred by convection, conduction, or radiation. Space heaters are used to heat single rooms and only consist of a single unit.

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