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Any air supply outlet that relies on a local fan to deliver air from the plenum through the diffuser into the conditioned space of the building.

A measure of the air exchange rate of a building, or space, that gives the time unit in hours.

The movement of air -- typically defined as that within a defined volume such as a room, duct or plenum.

Inlets are apertures through which air is intentionally drawn from a conditioned space. Grilles, diffusers and louvered openings can all serve as inlets. Examples are return inlets at ceiling level an [..]

The volume of supply air flowing through a cross sectional plane of a duct per unit time. Found by multiplying air velocity by the cross sectional area of the duct, measured in cubic feet per minute ( [..]

Air in the general surroundings of the space in question, whether an external or internal space. Generally this refers to areas outside of work locations for the building occupants.

A ceiling-based air distribution system supplies air to, and removes air from, a conditioned space at ceiling level. Both supply and return grilles are located in the ceiling plane, above which there [..]