WHS18SZB21S
Westinghouse · mini-split heat pump
WHS18SZB21S is in the certified data as of Sep 19, 2026.
- 18,000 Btu (1.5-ton)
- Mini-split
This unit's certified figures are identical to AO-18U3R25E (Hisense). See the full figures, the performance chart, and a comparison with other units here:
AO-18U3R25E (main listing for WHS18SZB21S)
Certified pairings and AHRI numbers
1 certified pairing · 1 indoor unit
| AHRI certificate | Indoor unit | Furnace | Certified | At 5°FBtu/h | At 47°FBtu/h | At 95°FBtu/h · cooling |
|---|---|---|---|---|---|---|
| 217101981 | WHS18WMB21S | No furnace | Feb 11, 2026 | 13,400 | 18,000 | 18,000 |
Brands listing this model number
Product history
- WHS18SZB21S first appeared in the certified data between March 2025 and May 2025.