scope:

This standard applies to central station air-handling units, as defined in Section 3.

Exclusions.

This standard does not apply to forced-circulation, free-delivery air-coolers for refrigeration, which are covered in ARI Standard 420.

This standard does not apply to unit heaters intended for free delivery of heated air or to room fan-coil air conditioners as defined in ARI Standard 440.

This standard does not apply to units having direct expansion coils which are incorporated by the manufacturer in a matched split system air-conditioner or as otherwise defined in the product scope definition of the ARI Unitary Small Equipment and Unitary Large Equipment Sections and covered in ARI Standard 210/240 or in ARI Standard 344/360.

This standard does not apply to unit ventilators as defined in ARI Standard 840.

This standard does not apply to ratings for plenum (plug) and axial fans.

Purpose. The purpose of this standard is to establish for central station air-handling units: definitions; classifications; requirements for testing and rating; 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.