AHRI 920 (I-P) and 921 (SI): Performance Rating of Direct Expansion-dedicated Outdoor Air System Units (with Addendum 1)
Standard Scope
This standard applies to factory-assembled commercial or industrial DX-DOAS units as defined in Section 3 of this standard.
Free Download
- AHRI 920 (I-P/2020) Performance Rating of Direct Expansion-Dedicated Outdoor Air System Units (with Addendum 1)
- AHRI 921 (SI/2020) Performance Rating of Direct Expansion-Dedicated Outdoor Air System Units (with Addendum 1)
- ANSI/AHRI 920 (I-P/2015): Performance Rating of DX-Dedicated Outdoor Air System Units
- ANSI/AHRI 921 (SI/2015): Performance Rating of DX-Dedicated Outdoor Air System Units
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