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2. The best portable air conditioners - AOL

   www.aol.com/news/best-portable-air-conditioners...

   A portable air conditioning unit, by comparison, sits on the floor with a vent that you can snake through a window or the wall. ... Prouty told us that pulling air from the outside produces ...

3. Packaged terminal air conditioner - Wikipedia

   en.wikipedia.org/wiki/Packaged_terminal_air...

   Packaged terminal air conditioner installed in a residential apartment. A packaged terminal air conditioner (PTAC) is a type of self-contained heating and air conditioning system intended to be mounted through a wall. [1] The first practical semi-portable air conditioning unit invented by engineers at Chrysler Motors. It entered the market in ...

4. Air conditioning - Wikipedia

   en.wikipedia.org/wiki/Air_conditioning

   A portable system has an indoor unit on wheels connected to an outdoor unit via flexible pipes, similar to a permanently fixed installed unit (such as a ductless split air conditioner). Hose systems, which can be monoblock or air-to-air , are vented to the outside via air ducts.

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. Dedicated outdoor air system - Wikipedia

   en.wikipedia.org/wiki/Dedicated_outdoor_air_system

   DOAS air handling unit with heat recovery wheel and passive dehumidification. A dedicated outdoor air system (DOAS) is a type of heating, ventilation and air-conditioning system that consists of two parallel systems: a dedicated system for delivering outdoor air ventilation that handles both the latent and sensible loads of conditioning the ventilation air, and a parallel system to handle the ...

7. [Latest] Global HVAC Maintenance Service Market Size/Share ...

   lite.aol.com/tech/story/0022/20250113/9330483.htm

   Austin, TX, USA, Jan. 13, 2025 (GLOBE NEWSWIRE) -- Custom Market Insights has published a new research report titled “HVAC Maintenance Service Market Size, Trends and Insights By Type (Heating, Ventilation, Cooling), By Service (Repair, Upgrade/Replacement, Maintenance, Consulting), By Product (Air Handling Units, AC System, Air purifier, Heat Pump, Others), By Application (Residential ...