Heat pump model numbers starting WM
9 certified units whose model number starts WM, out of every unit in the A to Z. Updated Oct 17, 2026.
The units
One row per certified model number. All 9 in this group are listed; nothing is held back for a second page.
| Model number | Type | Size class | Brands | Certified pairings |
|---|---|---|---|---|
| WMCA-18HFMO | mini-split | 18,000 Btu (1.5-ton) | 1 | 3 |
| WMCA-27HFMO | mini-split | 24,000 Btu (2-ton) | 1 | 3 |
| WMCA-36HFMO | mini-split | 36,000 Btu (3-ton) | 1 | 3 |
| WMCA-48HFMO | mini-split | 48,000 Btu (4-ton) | 1 | 3 |
| WMCA-55HFMO | mini-split | 54,000 Btu (4.5-ton) | 1 | 3 |
| WMMA-18HFMO | mini-split | 18,000 Btu (1.5-ton) | 1 | 3 |
| WMMA-27HFMO | mini-split | 30,000 Btu (2.5-ton) | 1 | 3 |
| WMMA-36HFMO | mini-split | 36,000 Btu (3-ton) | 1 | 1 |
| WMMA-48HFMO | mini-split | 48,000 Btu (4-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