Heat pump model numbers starting SM
18 certified units whose model number starts SM, out of every unit in the A to Z. Updated Oct 17, 2026.
The units
One row per certified model number. All 18 in this group are listed; nothing is held back for a second page.
| Model number | Type | Size class | Brands | Certified pairings |
|---|---|---|---|---|
| SM-12HFO2-CU | mini-split | 12,000 Btu (1-ton) | 1 | 1 |
| SM-12HSM2-CU | mini-split | 12,000 Btu (1-ton) | 1 | 1 |
| SM-18HFO2-CU | mini-split | 18,000 Btu (1.5-ton) | 1 | 1 |
| SM-18HSM2-CU | mini-split | 18,000 Btu (1.5-ton) | 1 | 1 |
| SM-24HSM2-CU | central | 24,000 Btu (2-ton) | 1 | 2 |
| SM-36HSM2-CU | central | 30,000 Btu (2.5-ton) | 1 | 2 |
| SM-48HSM2-CU | central | 48,000 Btu (4-ton) | 1 | 2 |
| SM-60HSM2-CU | central | 54,000 Btu (4.5-ton) | 1 | 2 |
| SMZ2B1-H18A-O | mini-split | 18,000 Btu (1.5-ton) | 1 | 3 |
| SMZ2B1V-H18A-O | mini-split | 18,000 Btu (1.5-ton) | 1 | 3 |
| SMZ3B1-H27A-O | mini-split | 30,000 Btu (2.5-ton) | 1 | 3 |
| SMZ3B1V-H27A-O | mini-split | 30,000 Btu (2.5-ton) | 1 | 3 |
| SMZ4B1-H36A-O | mini-split | 36,000 Btu (3-ton) | 1 | 3 |
| SMZ4B1V-H36A-O | mini-split | 36,000 Btu (3-ton) | 1 | 3 |
| SMZ5B1-H48A-O | mini-split | 48,000 Btu (4-ton) | 1 | 3 |
| SMZ5B1-H55A-O | mini-split | 54,000 Btu (4.5-ton) | 1 | 3 |
| SMZ5B1V-H48A-O | mini-split | 48,000 Btu (4-ton) | 1 | 3 |
| SMZ5B1V-H55A-O | mini-split | 54,000 Btu (4.5-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