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2. Forced-air - Wikipedia

   en.wikipedia.org/wiki/Forced-air

   Regardless of type, all air handlers consist of an air filter, blower, heat exchanger/element/coil, and various controls. Like any other kind of central heating system, thermostats are used to control forced air heating systems. Forced air heating is the type of central heating most commonly installed in North America. [1]

3. Air Force Specialty Code - Wikipedia

   en.wikipedia.org/wiki/Air_Force_Specialty_Code

   The Air Force Specialty Code (AFSC) is an alphanumeric code used by the United States Air Force to identify a specific job. Officer AFSCs consist of four characters and enlisted AFSCs consist of five characters. A letter prefix or suffix may be used with an AFSC when more specific identification of position requirements and individual ...

4. Forced-air gas - Wikipedia

   en.wikipedia.org/wiki/Forced-air_gas

   A small leak of combustion gases into the heated air can be dangerous to the occupants of the heated space, because of possible carbon monoxide build up. [2] A condensing forced-air furnace; flue pipes are plastic, not metal, because of the low waste-gas temperature. Plastic outlet for a condensing natural gas hot air furnace.

5. Thermal expansion valve - Wikipedia

   en.wikipedia.org/wiki/Thermal_expansion_valve

   A thermal expansion valve is a key element to a heat pump; this is the cycle that makes air conditioning, or air cooling, possible. A basic refrigeration cycle consists of four major elements: a compressor, a condenser, a metering device and an evaporator. As a refrigerant passes through a circuit containing these four elements, air ...

6. List of major commands of the United States Air Force

   en.wikipedia.org/wiki/List_of_major_commands_of...

   This is a list of major commands (MAJCOM) of the United States Air Force. A major command is a significant Air Force organization subordinate to Headquarters, US Air Force. Major commands have a headquarters staff and subordinate organizations, typically formed in numbered air forces, centers, wings, and groups. [1]

7. Prime Base Engineer Emergency Force - Wikipedia

   en.wikipedia.org/wiki/Prime_Base_Engineer...

   That same year the Air Force deployed dozens of separate teams as the buildup of forces in Southeast Asia began, base civil engineering forces were inundated with construction, operations, and maintenance requirements. Large numbers of U.S. Air Force strike aircraft were sent to bases where pavement for aircraft parking was at a premium ...