Heat pump model numbers starting HH
20 certified units whose model number starts HH, out of every unit in the A to Z. Updated Oct 18, 2026.
The units
One row per certified model number. All 20 in this group are listed; nothing is held back for a second page.
| Model number | Type | Size class | Brands | Certified pairings |
|---|---|---|---|---|
| HH824E2S11 | central | 24,000 Btu (2-ton) | 7 | 1,944 |
| HH824E2S12 | central | 24,000 Btu (2-ton) | 6 | 1,435 |
| HH836E2S11 | central | 36,000 Btu (3-ton) | 7 | 5,267 |
| HH836E2S12 | central | 30,000 Btu (2.5-ton) | 6 | 3,583 |
| HH860E2S11 | central | 42,000 Btu (3.5-ton) | 7 | 3,582 |
| HH860E2S12 | central | 42,000 Btu (3.5-ton) | 6 | 2,207 |
| HHS-18HD-A | central | 18,000 Btu (1.5-ton) | 1 | 3 |
| HHS-18HD-B | central | 18,000 Btu (1.5-ton) | 1 | 3 |
| HHS-24HD-A | central | 24,000 Btu (2-ton) | 1 | 3 |
| HHS-24HD-B | central | 24,000 Btu (2-ton) | 1 | 3 |
| HHS-25HD-B | central | 24,000 Btu (2-ton) | 1 | 3 |
| HHS-30HD-A | central | 30,000 Btu (2.5-ton) | 1 | 3 |
| HHS-30HD-B | central | 30,000 Btu (2.5-ton) | 1 | 3 |
| HHS-36HD-A | central | 36,000 Btu (3-ton) | 1 | 3 |
| HHS-36HD-B | central | 36,000 Btu (3-ton) | 1 | 3 |
| HHS-42HD-B | central | 42,000 Btu (3.5-ton) | 1 | 1 |
| HHS-48HD-A | central | 48,000 Btu (4-ton) | 1 | 1 |
| HHS-48HD-B | central | 48,000 Btu (4-ton) | 1 | 1 |
| HHS-60HD-A | central | 54,000 Btu (4.5-ton) | 1 | 1 |
| HHS-60HD-B | 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