AHRI Standard 680 (I-P) and 681 (SI): Standard for Performance Rating of Residential Air Filter Equipment

This standard applies to factory-made air filter equipment and air filter media, as used in such equipment, for removing particulate matter, when used in environmental conditioning of inhabited spaces in residential facilities. The standard evaluates the “combined” performance of air filter equipment in all aspects: initial resistance, final resistance, particle size efficiency, and dust holding capacity. This offers both the user and specifier a complete view of the air filter equipment for comparison purposes.

• AHRI 680-2017 (I-P): Standard for Performance Rating of Residential Air Filter Equipment


• AHRI 681-2017 (SI): Performance Rating Residential Air Filter Equipment


• ANSI/AHRI 680-2015 (R2023) (I-P): Standard for Performance Rating of Residential Air Filter Equipment​​​​​​


• ANSI/AHRI 681-2015 (R2023) (SI): Standard for Performance Rating of Residential Air Filter Equipment

©2023, by Air-Conditioning, Heating, and Refrigeration Institute