Heat pump model numbers starting ZO
4 certified units whose model number starts ZO, out of every unit in the A to Z. Updated Oct 17, 2026.
The units
One row per certified model number. All 4 in this group are listed; nothing is held back for a second page.
| Model number | Type | Size class | Brands | Certified pairings |
|---|---|---|---|---|
| ZOV-24HDTB | central | 24,000 Btu (2-ton) | 1 | 1 |
| ZOV-36HDTB | central | 36,000 Btu (3-ton) | 1 | 1 |
| ZOV-48HDTB | central | 48,000 Btu (4-ton) | 1 | 1 |
| ZOV-60HDTB | central | 54,000 Btu (4.5-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