AHRI 421 (SI):2023
Current
Current
The latest, up-to-date edition.
Performance Rating of Forced-circulation Free-delivery Unit Coolers
Published date
22-06-2023
This standard applies to factory-made, forced-circulation free-delivery unit coolers, as defined in Section 3, operating with a volatile refrigerant fed by either direct expansion or liquid overfeed at wet or dry conditions, or both.
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