Westinghouse Heat Pump Manuals
Select your Westinghouse model number below for installation steps, settings, maintenance schedules, troubleshooting and the full specification sheet. Your model number is printed on the rating plate on the side of the outdoor unit.
Westinghouse heat pumps by model number
| Model | Description | Certified |
|---|---|---|
| WHM48SZA21SWH ULTRA HD-COIL | 3.5-ton split-system heat pump | October 2024 |
| WHP09SZA21SHi UNI | 9,000 Btu/h ductless mini-split heat pump | June 2026 |
| WHP18M2A21SHi MULTI Xtreme | 18,000 Btu/h ductless mini-split heat pump | June 2026 |
| WHP18SZA21SHi UNI | 18,000 Btu/h ductless mini-split heat pump | June 2026 |
| WHP24M3A21SHi MULTI Xtreme | 24,000 Btu/h ductless mini-split heat pump | June 2026 |
| WHP24SZA21SHi UNI | 23,000 Btu/h ductless mini-split heat pump | June 2026 |
| WHP36M4A21SHi MULTI Xtreme | 32,000 Btu/h ductless mini-split heat pump | June 2026 |
| WHP42M5A21SHi MULTI Xtreme | 42,000 Btu/h ductless mini-split heat pump | June 2026 |
| WHS09SZB21SS**SZB2 | 9,000 Btu/h ductless mini-split heat pump | February 2026 |
| WHS18SZB21SS**SZB2 | 18,000 Btu/h ductless mini-split heat pump | February 2026 |
| WHS30SZB21SS**SZB2 | 30,000 Btu/h ductless mini-split heat pump | February 2026 |
| WHU09SZA21SHi UNI | 9,000 Btu/h ductless mini-split heat pump | June 2026 |
| WHU12SZA21SHi UNI | 12,000 Btu/h ductless mini-split heat pump | June 2026 |
| WHU18SZA21SHi UNI | 18,000 Btu/h ductless mini-split heat pump | June 2026 |
| WHU24SZA21SHi UNI | 24,000 Btu/h ductless mini-split heat pump | June 2026 |
| WHZ09SZA21SHi UNI | 9,000 Btu/h ductless mini-split heat pump | May 2026 |
| WHZ12SZA21SHi UNI | 12,000 Btu/h ductless mini-split heat pump | June 2026 |