General

General

General nature or nature terms.

Industry: Natural environment

Add a new term

Contributors in General

Become a Contributors

General

air exchange rate

Natural environment; General

The rate at which outside air replaces indoor air in a given space.

Open vertical gap or empty space that separates drinking water supply to be protected from another water system in a treatment plant or other location. The open gap protects the drinking water from ...

air handling unit

Natural environment; General

Equipment that includes a fan or blower, heating and/or cooling coils, regulator controls, condensate drain pans, and air filters.

air mass

Natural environment; General

A large volume of air with certain meteorological or polluted characteristics--e.g., a heat inversion or smogginess--while in one location. The characteristics can change as the air mass moves away.

air permeability

Natural environment; General

Permeability of soil with respect to air. Important to the design of soil-gas surveys. Measured in darcys or centimeters-per-second.

air plenum

Natural environment; General

Any space used to convey air in a building, furnace, or structure. The space above a suspended ceiling is often used as an air plenum.

air pollutant

Natural environment; General

Any substance in air that could, in high enough concentration, harm man, other animals, vegetation, or material. Pollutants may include almost any natural or artificial composition of airborne matter ...