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  2. Fan coil unit - Wikipedia

    en.wikipedia.org/wiki/Fan_coil_unit

    The thermostat controls the fan speed and/or the flow of water or refrigerant to the heat exchanger using a control valve. Due to their simplicity, flexibility, and easy maintenance, fan coil units can be more economical to install than ducted 100% fresh air systems (VAV) or central heating systems with air handling units or chilled beams. FCUs ...

  3. Wax thermostatic element - Wikipedia

    en.wikipedia.org/wiki/Wax_thermostatic_element

    Cooling circuits have a small bypass path even when the thermostat is closed, usually by a small hole in the thermostat. This allows enough flow of cooling water to heat the thermostat when warming up. It also provided an escape route for trapped air when first filling the system.

  4. Thermal expansion valve - Wikipedia

    en.wikipedia.org/wiki/Thermal_expansion_valve

    A thermal expansion valve is a key element to a heat pump; this is the cycle that makes air conditioning, or air cooling, possible. A basic refrigeration cycle consists of four major elements: a compressor, a condenser, a metering device and an evaporator. As a refrigerant passes through a circuit containing these four elements, air ...

  5. Automotive air conditioning - Wikipedia

    en.wikipedia.org/wiki/Automotive_air_conditioning

    Sustainable automotive air conditioning is the subject of a debate – also known as the Cool War – about the next-generation refrigerant in car air conditioning. An advocacy group, The Alliance for CO 2 Solutions , supports the uptake of carbon dioxide (CO 2 ) as a refrigerant in passenger cars, and the chemical industry is developing new ...

  6. Alabama A&M LB Medrick Burnett Jr. dies after head injury ...

    www.aol.com/sports/alabsms-m-lb-medrick-burnett...

    Alabama A&M freshman linebacker Medrick Burnett Jr. died one month after sustaining a head injury in an Oct. 29 game. He was hospitalized for the entire past month.

  7. Heat recovery ventilation - Wikipedia

    en.wikipedia.org/wiki/Heat_recovery_ventilation

    An exhaust air heat pump (EAHP) extracts heat from the exhaust air of a building and transfers the heat to the supply air, hot tap water and/or hydronic heating system (underfloor heating, radiators). [27] [28] This requires at least mechanical exhaust but mechanical supply is optional; see mechanical ventilation. This type of heat pump ...

  8. 12 of the Most Expensive Mistakes People Have Made - AOL

    www.aol.com/12-most-expensive-mistakes-people...

    “Not paying my car insurance on time. Then proceeding to slide through an icy intersection and hit another car. No one got hurt, just my wallet. Almost $7,000.” – u/sews4dogs. 5. Hindsight ...

  9. College Football Playoff first round showed system is broken ...

    www.aol.com/college-football-playoff-already...

    It's already broken and bombing. That doesn't mean the College Football Playoff can't be fixed with the right plan. It's actually pretty simple.