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2. List of recreational vehicles - Wikipedia

   en.wikipedia.org/wiki/List_of_recreational_vehicles

   In the State of California, in order to qualify as Class B RV, a vehicle must have four of the following six built-in items: [4] a water system, typically a sink or shower; a refrigerator; a cooking system; a fuel or 120 V electrical system; an AC unit or heater; a toilet

3. Variable air volume - Wikipedia

   en.wikipedia.org/wiki/Variable_air_volume

   Control of the system's fan capacity is critical in VAV systems. Without proper and rapid flow rate control, the system's ductwork, or its sealing, can easily be damaged by overpressurization. In the cooling mode of operation, as the temperature in the space is satisfied, a VAV box closes to limit the flow of cool air into the space.

4. 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 ...

5. Glossary of HVAC terms - Wikipedia

   en.wikipedia.org/wiki/Glossary_of_HVAC_terms

   A thermostat is a system that monitors and regulates a heating or cooling system. It can be used to set the desired temperature at which it keeps the environment either heated or cooled. two-stage (cooling and heating) A two-stage air conditioner is designed to operate on high and low settings during different weather conditions and seasons.

6. Truma (company) - Wikipedia

   en.wikipedia.org/wiki/Truma_(company)

   The company develops, manufactures and sells heating and air conditioning systems, hot water boilers, maneuvering systems and products for energy and gas supply. Truma was founded in 1949 in Munich, Germany. Today the headquarters is located in Putzbrunn near Munich and the company operates worldwide sales offices. Since the introduction of the ...

7. Variable refrigerant flow - Wikipedia

   en.wikipedia.org/wiki/Variable_refrigerant_flow

   Variable refrigerant flow (VRF), also known as variable refrigerant volume (VRV), is an HVAC technology invented by Daikin Industries, Ltd. in 1982. [1] Similar to ductless mini-split systems, VRFs use refrigerant as the primary cooling and heating medium, and are usually less complex than conventional chiller-based systems.

8. The 6 best-looking window air conditioners that look like decor

   www.aol.com/best-looking-window-air-conditioners...

   The Soleus Air Exclusive air conditioner installs like any other AC, but only takes up 3 inches of window space. This means that the part over the window sill is only 3 inches long, marking a ...

9. Heat pump and refrigeration cycle - Wikipedia

   en.wikipedia.org/wiki/Heat_pump_and...

   Thermodynamic heat pump cycles or refrigeration cycles are the conceptual and mathematical models for heat pump, air conditioning and refrigeration systems. [1] A heat pump is a mechanical system that transmits heat from one location (the "source") at a certain temperature to another location (the "sink" or "heat sink") at a higher temperature. [2]