Heat pump model numbers starting 1K
1 certified unit whose model number starts 1K, out of every unit in the A to Z. Updated Oct 17, 2026.
The units
One row per certified model number. All 1 in this group are listed; nothing is held back for a second page.
| Model number | Type | Size class | Brands | Certified pairings |
|---|---|---|---|---|
| 1KARDA24SZO20.5 | mini-split | 24,000 Btu (2-ton) | 2 | 2 |
Other groups
Every model number group, A to Z
Find a model by its number, its indoor unit, or its AHRI number