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  2. Heating, ventilation, and air conditioning - Wikipedia

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

    Split systems are preferred and widely used worldwide except in North America. In North America, split systems are most often seen in residential applications, but they are gaining popularity in small commercial buildings. Split systems are used where ductwork is not feasible or where the space conditioning efficiency is of prime concern. [33]

  3. Air conditioning - Wikipedia

    en.wikipedia.org/wiki/Air_conditioning

    The Mitsubishi model was the first air conditioner with a cross-flow fan. [64] [65] [66] In 1969, the first mini-split air conditioner was sold in the US. [67] Multi-zone ductless systems were invented by Daikin in 1973, and variable refrigerant flow systems (which can be thought of as larger multi-split systems) were also invented by Daikin in ...

  4. Constant air volume - Wikipedia

    en.wikipedia.org/wiki/Constant_air_volume

    Constant air volume (CAV) is a type of heating, ventilating, and air-conditioning system.In a simple CAV system, the supply air flow rate is constant, but the supply air temperature is varied to meet the thermal loads of a space.

  5. This portable AC makes a room 20° colder in minutes — and it ...

    www.aol.com/lifestyle/portable-ac-makes-room-20...

    The need for air conditioning is real and lucky for us, Amazon has a budget-friendly AC unit: the Midea Portable Air Conditioner is just $250 (down from $339) with the on-page coupon.

  6. Split-system air conditioner - Wikipedia

    en.wikipedia.org/?title=Split-system_air...

    Retrieved from "https://en.wikipedia.org/w/index.php?title=Split-system_air_conditioner&oldid=752199363"

  7. Glossary of HVAC terms - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_HVAC_terms

    A two-stage air conditioner is designed to operate on high and low settings during different weather conditions and seasons. The high setting is used during extreme weather, and the low setting is used during moderate weather. This type of air conditioner produces a balanced temperature and is in use for a longer period of time.

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