Heat pump model numbers starting SD
5 certified units whose model number starts SD, out of every unit in the A to Z. Updated Oct 17, 2026.
The units
One row per certified model number. All 5 in this group are listed; nothing is held back for a second page.
| Model number | Type | Size class | Brands | Certified pairings |
|---|---|---|---|---|
| SDB1-H24A-O | central | 24,000 Btu (2-ton) | 1 | 7 |
| SDB1-H30A-O | central | 30,000 Btu (2.5-ton) | 1 | 5 |
| SDB1-H36A-O | central | 36,000 Btu (3-ton) | 1 | 6 |
| SDB1-H48A-O | central | 42,000 Btu (3.5-ton) | 1 | 3 |
| SDB1-H60A-O | central | 54,000 Btu (4.5-ton) | 1 | 5 |
Other groups
Every model number group, A to Z
Find a model by its number, its indoor unit, or its AHRI number