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  2. Glossary of HVAC terms - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_HVAC_terms

    The condenser is the hot side of an air conditioner or heat pump. Condensers are heat exchangers, and can transfer heat to air or to an intermediate fluid (such as water or an aqueous solution of ethylene glycol ) to carry heat to a distant sink, such as ground (earth sink), a body of water, or air (as with cooling towers).

  3. Chilled beam - Wikipedia

    en.wikipedia.org/wiki/Chilled_beam

    A chilled beam is a type of radiation/convection HVAC system designed to heat and cool large buildings through the use of water. [1] This method removes most of the zone sensible local heat gains and allows the flow rate of pre-conditioned air from the air handling unit to be reduced, lowering by 60% to 80% the ducted design airflow rate and the equipment capacity requirements.

  4. Total electron content - Wikipedia

    en.wikipedia.org/wiki/Total_electron_content

    The value of the constant is approximately κ ≈ 40.308193 m 3 ·s −2; [4] [5] the units can be expressed equivalently as m·m 2 ·Hz 2 to highlight the cancellation involved in yielding delays τ in meters, given f in Hz and TEC in m −2. Typical daytime values of TEC are expressed on the scale from 0 to 100 TEC units.

  5. Heating, ventilation, and air conditioning - Wikipedia

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

    Central, "all-air" air-conditioning systems (or package systems) with a combined outdoor condenser/evaporator unit are often installed in North American residences, offices, and public buildings, but are difficult to retrofit (install in a building that was not designed to receive it) because of the bulky air ducts required. [32] (Minisplit ...

  6. Daikin Applied Americas - Wikipedia

    en.wikipedia.org/wiki/Daikin_Applied_Americas

    In the later 1940s and 1950s, McQuay products and sales grew as the demand for commercial air conditioning increased. The U.S. manufacturing facilities were expanded to meet this demand. McQuay quickly became the world's largest supplier of heat transfer coils.

  7. Radiant heating and cooling - Wikipedia

    en.wikipedia.org/wiki/Radiant_heating_and_cooling

    In Europe, the Roman hypocaust system, developed around the 3rd century BC, was an early radiant heating method using a furnace connected to underfloor and wall flues to circulate hot air in public baths and villas. This technology spread across the Roman Empire but declined after its fall, replaced by simpler fireplaces in the Middle Ages.

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