AHRI 420 (I-P) and 421 (SI): Performance Rating of Forced-circulation Free-delivery Unit Coolers for Refrigeration

Standard Scope

This standard applies to factory-made, Forced-Circulation, Free-Delivery Unit Coolers operating with a Volatile Refrigerant fed by either direct expansion or liquid overfeed at wet and/or dry conditions.

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AHRI 420 (I-P/2016): Performance Rating of Forced-circulation Free-delivery Unit Coolers for Refrigeration

AHRI 421 (SI/2016): Performance Rating of Forced-circulation Free-delivery Unit Coolers for Refrigeration