Heat pump model numbers starting HL
4 certified units whose model number starts HL, 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 |
|---|---|---|---|---|
| HL19B2421 | central | 24,000 Btu (2-ton) | 4 | 270 |
| HL19B3621 | central | 36,000 Btu (3-ton) | 4 | 96 |
| HL19B4821 | central | 48,000 Btu (4-ton) | 4 | 68 |
| HL19B6021 | central | 54,000 Btu (4.5-ton) | 4 | 73 |
Other groups
Every model number group, A to Z
Find a model by its number, its indoor unit, or its AHRI number