Air Control and Distribution Devices

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Staff Contact: Kezhen Shen

Related Standards

Related Standard 885
Standard 885 Scope
This standard provides a consistent industry-accepted method for estimating sound pressure levels in a conditioned space for the application of air terminals and air outlets. Air terminals, air outlets, and the low pressure ductwork which connects them are considered as sound sources and are the subject of this standard. The method described in this Standard can be used to identify acoustically critical paths in the system design. The design effects of inserting alternative components and changes in the system can be evaluated.

Related Standard 880
Standard 880 Scope
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 conformance conditions. This standard applies to air control devices used in air distribution systems.

Related Standard 881
Standard 881 Scope
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 conformance conditions. This standard applies to air control devices used in air distribution systems.

Section Scope

Air control and distribution devices of the types generally used in mechanical air conditioning, as outlined in the subsection scopes following:

Fan Powered Chilled Water Terminal Subsection:

Scope: Fan powered air terminals which include a hydronic cooling coil and an airflow regulating primary air valve and in which the primary air valve is in series with the fan and all air flows through the fan. The primary air shall bypass the cooling coil. The cooling coil shall be designed and rated for sensible operation only. The unit may have supplemental heat.

Excluded are all products specifically covered by the Air Heating and Cooling Coils Subsection, Chilled Beams Section and the Room Fan Coil Units Subsection.

Variable Air Volume Terminal Subsection:

Scope: Ducted devices, used to deliver air into/or remove air from a space and which provide control of air volume, direction, temperature, and/or pressure. Specifically included are the following devices:

  1. Diffusers
  2. Constant or Variable Volume Air Terminals

Excluded are all grilles and registers and those products specifically covered by the Air Heating and Cooling Coils Subsection and the Room Fan Coil Units Subsection.