air conditioning unit
31Auxiliary power unit — An auxiliary power unit (APU) is a device on a vehicle whose purpose is to provide energy for functions other than propulsion. Different types of APU are found on aircraft, as well as on some large ground vehicles.AircraftFunctions of APU The… …
32Constant air volume — (CAV) is a type of heating, ventilating, and air conditioning (HVAC) 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.[1] Most CAV systems are… …
33United States Air Force Pararescue — Pararescuemen (AFSC 1T2X1), also called PJs (a nickname pronounced pee jays ), are United States Air Force Special Operations Command (AFSOC) and Air Combat Command (ACC) operatives tasked with recovery and medical treatment of personnel in… …
34Sheppard Air Force Base — Infobox Airport name = Sheppard Air Force Base nativename = Part of Air Education and Training Command (AETC) image width = 300 caption = 18 Feb 1996 image2 width = 200 caption2 = Location of Sheppard Air Force Base IATA = SPS ICAO = KSPS FAA =… …
35Indoor air quality — (IAQ) is a term referring to the air quality within and around buildings and structures, especially as it relates to the health and comfort of building occupants. IAQ can be affected by microbial contaminants (mold, bacteria), gases (including… …
36Forced-air — A Forced air or Warm air heating system is one which uses air as its heat transfer medium. These systems use ductwork and vents as a means of air distribution. The return plenum carries the air from several large return grills (vents) to a… …
37Diesel multiple unit — Multiple unit trains Subtypes Electric multiple unit Diesel multiple unit Push–pull train Technology Multiple unit train control By Country …
38Compressed air car — Tata/MDI OneCAT A compressed air car is a car that uses a motor powered by compressed air. The car can be powered solely by air, or combined (as in a hybrid electric vehicle) with gasoline, diesel, ethanol, or an electric plant with regenerative… …
39Variable air volume — (VAV) is a technique for controlling the capacity of a heating, ventilating, and/or air conditioning (HVAC) system. The simplest VAV system incorporates one supply duct that, when in cooling mode, distributes approximately convert|55|F supply air …
40B unit — A B unit, in railroad terminology, is a locomotive unit (generally a diesel locomotive) which does not have a driving cab, or crew compartment, and must therefore be controlled from another, coupled locomotive with a driving cab (an A unit). The… …
