Heat pump model numbers starting 3K
8 certified units whose model number starts 3K, 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 |
|---|---|---|---|---|
| 3KARDA09SZO | mini-split | 9,000 Btu | 2 | 4 |
| 3KARDA12SZO | mini-split | 12,000 Btu (1-ton) | 1 | 9 |
| 3KARDA18MZ2 | mini-split | 18,000 Btu (1.5-ton) | 1 | 3 |
| 3KARDA18SZO | mini-split | 15,000 Btu | 1 | 6 |
| 3KARDA24SZO | mini-split | 24,000 Btu (2-ton) | 1 | 3 |
| 3KARDA27MZ3 | mini-split | 30,000 Btu (2.5-ton) | 2 | 7 |
| 3KARDA36MZ4 | mini-split | 36,000 Btu (3-ton) | 1 | 1 |
| 3KARDA48MZ5 | 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