L
#38
Lennox M series (MLB009S4S-1P)
Best for: Official 9,000 Btu/h official cooling, 28.1 official SEER2
7.9/10
What we like
- Official ENERGY STAR record lists 28.1 SEER2.
- Official ENERGY STAR record lists 11.5 HSPF2.
- Official ENERGY STAR record lists a cold-climate designation.
Watch out for
- Official ratings are for the certified outdoor and indoor combination shown; a different official indoor head can change the certified figures.
Score breakdown
| Official SEER2 | 28.1 |
|---|---|
| Official HSPF2 | 11.5 |
| Official EER2 | 16.2 |
| Official COP at 5°F | 2 |
| Official ENERGY STAR unique ID | 2,469,783 |
| Official outdoor unit model number | MLB009S4S-1P |
| Official indoor unit model number | MWMC009S4-1P |
| Official series name | M series |
| Official product type | HP - Mini or Multi Split |
| Official cooling capacity | 9,000 Btu/h |
| Official heating capacity at 47°F | 12,000 Btu/h |
| Official heating capacity at 17°F | 9,500 Btu/h |
| Official heating capacity at 5°F | 10,600 Btu/h |
| Official cold-climate designation | Yes |
| Official ENERGY STAR Most Efficient 2025 | Yes |
| Official refrigerant type | R-410A |
| Official AHRI reference number | 207683520 |
| Official indoor unit brand | LENNOX |
| Other official indoor models listed with this outdoor unit | MWMC009S4-P, MWMC009S4, M22A009S4-P, M22A009S4-2P, M22A009S4 |
| Official ENERGY STAR date certified | 06/13/2026 |
| Source-data note | The ENERGY STAR record lists other official indoor-unit matchups with this outdoor model that have different official SEER2, HSPF2, EER2 or COP at 5°F ratings. The scores on this page are for the official combination shown, not those other matchups. |
| Price | Check price |