Heat pump model numbers starting R4
4 certified units whose model number starts R4, 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 |
|---|---|---|---|---|
| R4H5S18*K*AAA* | central | 18,000 Btu (1.5-ton) | 7 | 10 |
| R4H5S24*K*AAA* | central | 24,000 Btu (2-ton) | 1 | 1 |
| R4H5S30*K*AAA* | central | 30,000 Btu (2.5-ton) | 11 | 11 |
| R4H5S36*K*AAA* | central | 36,000 Btu (3-ton) | 5 | 8 |
Other groups
Every model number group, A to Z
Find a model by its number, its indoor unit, or its AHRI number