AHRI 641 SI
Performance Rating of Commercial and Industrial Humidifiers
|Publication Date:||1 January 2017|
This standard applies to factory-made Commercial and Industrial Humidifiers, as defined in Section 3.
This standard applies to electric, gas, or hot water operated Commercial and Industrial Humidifiers including those that utilize steam from a central steam boiler.
Commercial and Industrial Humidifiers are intended for central air systems or direct in-space applications and may be installed in a mechanical room or outdoors.
This standard does not apply to the following:
Residential central system humidifiers as defined in the ANSI/AHRI Standard 611.
Residential self-contained humidifiers as defined in ANSI/AHRI Standard 621.
Portable residential humidifiers as defined in ANSI/AHAM HU-1.
The purpose of this standard is to establish for Commercial and Industrial Humidifiers: definitions; classifications; test requirements; rating requirements; minimum data requirements for Published Ratings; marking and nameplate data; and conformance conditions.
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.