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  2. Heating, ventilation, and air conditioning - Wikipedia

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

    Clean air delivery rate (CADR) is the amount of clean air an air cleaner provides to a room or space. When determining CADR, the amount of airflow in a space is taken into account. For example, an air cleaner with a flow rate of 30 cubic metres (1,000 cu ft) per minute and an efficiency of 50% has a CADR of 15 cubic metres (500 cu ft) per minute.

  3. Ton of refrigeration - Wikipedia

    en.wikipedia.org/wiki/Ton_of_refrigeration

    It was originally defined as the rate of heat transfer that results in the freezing or melting of 1 short ton (2,000 lb; 907 kg) of pure ice at 0 °C (32 °F) in 24 hours. [1] [2] The modern definition is exactly 12,000 Btu IT /h (3.516853 kW). Air-conditioning and refrigeration equipment capacity in the U.S. is often specified in "tons" (of ...

  4. Air conditioning - Wikipedia

    en.wikipedia.org/wiki/Air_conditioning

    In 1914, the first domestic air conditioning was installed in Minneapolis in the home of Charles Gilbert Gates. It is, however, possible that the considerable device (c. 2.1 m × 1.8 m × 6.1 m; 7 ft × 6 ft × 20 ft) was never used, as the house remained uninhabited [20] (Gates had already died in October 1913.)

  5. Packaged terminal air conditioner - Wikipedia

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

    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 1935, and was designed to fit under a window like many modern PTACs. [2]

  6. Willis Carrier - Wikipedia

    en.wikipedia.org/wiki/Willis_Carrier

    control air circulation and ventilation; cleanse the air; After several more years of refinement and field testing, on January 2, 1906, Carrier was granted U.S. patent 808,897 for an Apparatus for Treating Air, the world's first spray-type air conditioning equipment. It was designed to humidify or dehumidify air, heating water for the first ...

  7. Transport in Nigeria - Wikipedia

    en.wikipedia.org/wiki/Transport_in_Nigeria

    Nigeria’s transport network has expanded in recent years to accommodate a growing population. The transport and storage sector was valued at N2.6trn ($6.9bn) in current basic prices in 2020, down from N3trn ($8bn) in 2019, according to the National Bureau of Statistics (NBS). This was reflected in a lower contribution to GDP, at 1.8% in the ...

  8. Solar air conditioning - Wikipedia

    en.wikipedia.org/wiki/Solar_air_conditioning

    Both of these systems make use variable refrigerant flow technology, with high-efficiency variable-speed DC motors and compressors to require very little run power, and both also offer heat in addition to air conditioning. A third type of unit is available for larger, usually commercial, buildings and offers both grid and battery backup as well ...

  9. Air conditioned clothing - Wikipedia

    en.wikipedia.org/wiki/Air_conditioned_clothing

    One advantage of air-cooled clothing is that it requires much less energy to cool people down than to cool down their entire environment. For instance, an air cooled shirt uses 4,400 mAh of power for 8.5 hours on the fastest fan setting, while an average central air conditioning unit uses 3000 to 5000 watts of power [citation needed]. In some ...

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