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  2. Energy in Ohio - Wikipedia

    en.wikipedia.org/wiki/Energy_in_Ohio

    Ohio was a world leader in oil production in the late 19th and early 20th centuries. The Ohio oil and natural gas industries employ 14,400 citizens, resulting in $730 million in wages. The industries paid $202 million in royalties to landowners, and $84 million in free energy. [7]

  3. Forced-air - Wikipedia

    en.wikipedia.org/wiki/Forced-air

    Combines hydronic (hot water) heating with a forced air delivery; Heat is produced via combustion of fuel (gas/propane/oil) in a boiler; A heat exchanger (hydronic coil) is placed in the air handler similar to the refrigerant coil in a Heat Pump system or a Central AC. Copper is often specified in supply and return manifolds and in tube coils.

  4. Heating, ventilation, and air conditioning - Wikipedia

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

    Most modern hot water boiler heating systems have a circulator, which is a pump, to move hot water through the distribution system (as opposed to older gravity-fed systems). The heat can be transferred to the surrounding air using radiators , hot water coils (hydro-air), or other heat exchangers.

  5. Glossary of HVAC terms - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_HVAC_terms

    A heating coil is the part of the system that conducts heat. It allows electricity to act as fire. heat exchanger A heat exchanger is the part of the system that transfers heat from the hot parts of the machine or a system to the cold parts of the machine or system. heat gain heat load heat loss

  6. Heat pump - Wikipedia

    en.wikipedia.org/wiki/Heat_pump

    Specifically, the heat pump transfers thermal energy using a heat pump and refrigeration cycle, cooling the cool space and warming the warm space. [1] In winter a heat pump can move heat from the cool outdoors to warm a house; the pump may also be designed to move heat from the house to the warmer outdoors in summer.

  7. Hydronics - Wikipedia

    en.wikipedia.org/wiki/Hydronics

    Historically, in large-scale commercial buildings such as high-rise and campus facilities, a hydronic system may include both a chilled and a heated water loop, to provide for both heating and air conditioning. Chillers and cooling towers are used either separately or together as means to provide water cooling, while boilers heat water.

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