Heat pump model numbers starting M2
8 certified units whose model number starts M2, out of every unit in the A to Z. Updated Oct 17, 2026.
The units
One row per certified model number. All 8 in this group are listed; nothing is held back for a second page.
| Model number | Type | Size class | Brands | Certified pairings |
|---|---|---|---|---|
| M2H18H/O4S4P | mini-split | 18,000 Btu (1.5-ton) | 1 | 3 |
| M2OA-18HFN1-M | mini-split | 18,000 Btu (1.5-ton) | 3 | 15 |
| M2OA-18HFN1-M-L | mini-split | 18,000 Btu (1.5-ton) | 1 | 3 |
| M2OA-18HFN1-MQ1 | mini-split | 18,000 Btu (1.5-ton) | 1 | 1 |
| M2OI-18HFN1-M | mini-split | 18,000 Btu (1.5-ton) | 2 | 9 |
| M2OI-18HFN1-M-L | mini-split | 18,000 Btu (1.5-ton) | 1 | 3 |
| M2OX330-18HFN8-M1 | mini-split | 18,000 Btu (1.5-ton) | 1 | 3 |
| M2S18H/O4S4P | mini-split | 18,000 Btu (1.5-ton) | 1 | 3 |
Other groups
Every model number group, A to Z
Find a model by its number, its indoor unit, or its AHRI number