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AHRI Announces Update Of Standard 420
February 17, 2017

The Air Conditioning, Heating, and Refrigeration Institute (AHRI) has announced that the 2016 editions of AHRI 420 (I-P) and 421 (SI), Performance Rating of Forced-circulation Free-delivery Unit Coolers for Refrigeration, are now available for free download on the AHRI website. AHRI 420 (I-P)-2016 is a reaffirmation of the 2008 edition of the standard. A metric version of this standard also has been created and published as AHRI Standard 421 (SI).

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