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| Air filter wrench
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| Air gap
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Vertical, unobstructed distance, between the flood level in a plumbing fixture and the lowest water supply inlet, such as the distance between the rim of the tub and the faucet. |
| Air gun
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Compressed air powered nozzle, it is used for the spray application of paint, etc. |
| Air hammer
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A pneumatic nailer, essentially a hammer driven by compressed air. |
| Air handler unit (ahu)
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The inside part of the A/C system that contains the blower, cooling (evaporator) coil, and heater. The part of an HVAC system responsible for moving air, which may also clean, heat, or cool the air. |
| Air infiltration
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Leakage of air into rooms through cracks, windows doors and other openings. |
| Air infiltration measurement
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A building energy auditing technique used to determine and/or locate air leaks in a building shell or envelope. |
| Air layering
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A method of propagating single-stem plants, such as Ficus elastica decora, which have lost their lower leaves and become leggy. An incision is made to a portion of outer stem layer, damp sphagnum moss is wrapped in a bag around it until roots develop. Then it is cut and replanted with its shorter stem size. |
| Air lock
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Blockage in the flow of liquid, esp. on the suction side of a pump caused by an air bubble in the line. |
| Air pocket
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Dead air spaces in concrete, which are also known as a void, are usually one millimeter, with entrained pockets being smaller. |
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