Heat pump model numbers starting WI
4 certified units whose model number starts WI, out of every unit in the A to Z. Updated Oct 17, 2026.
The units
One row per certified model number. All 4 in this group are listed; nothing is held back for a second page.
| Model number | Type | Size class | Brands | Certified pairings |
|---|---|---|---|---|
| WIN09H7H51(O) | mini-split | 9,000 Btu | 1 | 1 |
| WIN12H7H51(O) | mini-split | 12,000 Btu (1-ton) | 1 | 1 |
| WIN18H7H51(O) | mini-split | 18,000 Btu (1.5-ton) | 1 | 1 |
| WIN24H7H51(O) | mini-split | 24,000 Btu (2-ton) | 1 | 1 |
Other groups
Every model number group, A to Z
Find a model by its number, its indoor unit, or its AHRI number