AHRI 611 (SI/2014): Performance Rating of Central System Humidifiers for Residential Applications
This standard applies to electrically operated central system humidifiers that depend on the air stream of a central air system for moisture evaporation and distribution. Central system humidifiers are intended for installation in central air systems. This standard does not apply to self-contained humidifiers, portable humidifiers, and humidifiers for commercial and industrial applications.
© 2014, by Air-Conditioning, Heating, and Refrigeration Institute