scope:

This standard applies to air control devices used in air distribution systems. These devices provide control of air volume with or without temperature control by one or more of the following means and may or may not include a fan:

Fixed or adjustable directional vanes (i.e. Bypass Air Terminal)

Pressure dependent volume Air Valves (including air induction nozzles)

Pressure independent (compensated) volume Air Valves (including air induction nozzles)

Integral heat exchange

On/off fan control

Variable speed fan control

Integral Diffuser Air Terminals

Exclusions.

This standard does not apply to registers, diffusers and grilles that do not include an Air Valve or to products specifically covered by ANSI/AHRI Standard 410 or ANSI/AHRI Standard 440.

Purpose.

The purpose of this standard is to establish for Air Terminals: definitions; classifications; test requirements; rating requirements; minimum data requirements for Published Ratings; marking and nameplate data; and voluntary conformance conditions.

Intent.

This standard is intended for the guidance of the industry, including manufacturers, engineers, installers, contractors and users.

Review and Amendment.

This standard is subject to review and amendment as technology advances.