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| Air-dried
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Dried by exposure to air in a yard or shed without artificial heat. |
| Air-entrained concrete
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Concrete that has been altered chemically, with an additive, to disperse air bubbles through the mix. A yard of air-entrained concrete may contain over three trillion bubbles. This mix is easier to work than standard concrete and stands up well in cold weather, resisting salts better than other concrete. While it is good for pouring in cold weather because the bubbles allow the concrete to expand and contract more readily, it is not as strong as regular concrete. Also referred to as Aerated Concrete. |
| Air-source heat pump
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A type of heat pump that transfers heat from outdoor air to indoor air during the heating season, and works in reverse during the cooling season. |
| Air-to-water heat pump
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A type of heat pump that transfers heat in outdoor air to water for space or water heating. |
| Airbrush
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Apparatus that applies paint by the use of compressed air and a fine nozzle. In this manner, application is able to be controlled to cover only a small area. |
| Airflow
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The distribution or movement of air. |
| Airfoil
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Device, which is shaped to provide a lifting, force when moved through an air current. |
| Airfoil fan
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Fan with blades with an airfoil cross section. |
| Airless spray
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A spray that increases the fluid pressure of paint by means of a pump that causes atomization with air, resulting in higher film build and little or no over-spray. |
| Airless sprayer
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Spray gun that uses pressure from a mechanical pump to pressurize the liquid or spin it from a wheel to apply paint or other liquid finishes. |
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