Performance Rating of Central Station Air-Handling Units
|Publication Date:||1 January 2009|
This standard applies to central station air-handling units, as defined in Section 3.
This standard applies to supply fan ratings for double width double inlet (DWDI) housed fans, axial fans, and full opening axial discharge plenum fans in a cabinet.
This standard does not apply to forced-circulation, free-delivery air-coolers for refrigeration, which are covered in AHRI Standard 420.
This standard does not apply to unit heaters intended for free delivery of heated air or to room fan-coils as defined in AHRI Standard 440.
This standard does not apply to units that have direct expansion coils incorporated by the manufacturer in a matched split system air-conditioner, or as otherwise defined in the product scope definition of the AHRI Unitary Small Equipment and Unitary Large Equipment Sections and covered in AHRI Standard 210/240 or in AHRI Standard 340/360.
This standard does not apply to unit ventilators as defined in AHRI Standard 840.
Purpose. The purpose of this standard is to establish for Central Station Air-Handling Units: definitions; classifications; test requirements; rating requirements; minimum data requirements for Published Ratings; marking and nameplate data; and conformance conditions.
Intent. 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.