Heat pump model numbers starting 18
10 certified units whose model number starts 18, out of every unit in the A to Z. Updated Oct 17, 2026.
The units
One row per certified model number. All 10 in this group are listed; nothing is held back for a second page.
| Model number | Type | Size class | Brands | Certified pairings |
|---|---|---|---|---|
| 18000-UNI-O | mini-split | 18,000 Btu (1.5-ton) | 1 | 1 |
| 18000Z-23S-230-I | mini-split | 18,000 Btu (1.5-ton) | 1 | 1 |
| 18000Z-23S-230-O | mini-split | 18,000 Btu (1.5-ton) | 1 | 1 |
| 1824SPV0-HP-X-D | central | 18,000 Btu (1.5-ton) | 1 | 1 |
| 18H421ZOMI | mini-split | 18,000 Btu (1.5-ton) | 1 | 1 |
| 18H521ZOMI | mini-split | 18,000 Btu (1.5-ton) | 1 | 1 |
| 18MPC2-XX-A | mini-split | 18,000 Btu (1.5-ton) | 1 | 3 |
| 18MPC3-HE-B | mini-split | 18,000 Btu (1.5-ton) | 1 | 3 |
| 18MSZ-M-A | mini-split | 18,000 Btu (1.5-ton) | 1 | 1 |
| 18MSZ-M-B | mini-split | 18,000 Btu (1.5-ton) | 1 | 8 |
Other groups
Every model number group, A to Z
Find a model by its number, its indoor unit, or its AHRI number