Variable Air Volume Terminals

Certification Program
Find  AHRI Certified® Variable Air Volume Terminals


General Operations Manual
> Related Standards
> AHRI 885-2008 with Addendum 1:  Procedure for Estimating Occupied Space Sound Levels in the Application of Air Terminals and Air Outlets

Standard 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.

Free Downloads:
AHRI Standard 885-2008 with Addendum and
Duct Discharge Calculation Spreadsheet for AHRI Standard 885-2008

© 2008, by Air-Conditioning, Heating and Refrigeration Institute

> ANSI/AHRI Standard 880 (I-P) - 2011 with Addendum 1: Performance Rating of Air Terminals

Standard 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.

Free Download: ANSI/AHRI Standard 880 (I-P) - 2011 with Addendum 1: Performance Rating of Air Terminals

© 2011, by Air-Conditioning, Heating, and Refrigeration Institute

Program Scope

This program applies to 50 Hz and 60 Hz Production Model Variable Air Volume Terminals, as defined in Section 1.2, and used in non-residential air distribution systems which provide control of air volume and/or air temperature by one (1) or more of the following means and may include a fan:
  • Fixed or adjustable directional vanes;
  • Pressure dependent volume dampers or shutoff valves (including air induction nozzles and dampers);
  • Pressure compensated volume dampers or shutoff valves (including air induction nozzles and dampers);
  • Integral heat exchanger(s);
  • On/off fan control; and/or
  • Variable speed fan control.

Program Scope Exclusions
This certification program does not apply to non-VAV diffusers, grilles, or registers or to products specifically covered by the AHRI Forced Circulation Air-Cooling and Air-Heating Coils Certification Program or the AHRI Room Fan-Coil Certification Program.

Certified Ratings
The following certification program ratings are verified by test:
  • Primary Airflow, cfm [m3/s];
  • Minimum Supply Operating Pressure, in. H2O [kPa];
  • Radiated Sound Power Level, dB;
  • Discharge Sound Power Level, dB;
  • Electrical Power Input, W;
  • Power Consumption (optional), W/cfm; and
  • Induced or Fan Airflow Rate, cfm [m3/s].

The rules and procedures for obtaining and maintaining certification are detailed in the Resources section above. The specific Standard listed above details the technical requirements for rating and publishing your product performance, the AHRI General Operations Manual (OM) details the program operational rules that are generic to all of AHRI’s certification programs and lastly, the Product-specific Operations Manual provides the operational rules that are specific to this program along with the required documents and fees. Please ensure that you are familiar with the latest rules and procedures for this program.