Midea 37MAHAQ06AA3
Matched with the D5MAHAQ06XA3 indoor unit, this system is certified to the ENERGY STAR cold-climate criteria and publishes 14.80 HSPF2 and 25.70 SEER2, with 7,700 BTU/h of heating at 5°F.
Heating capacity of the Midea 37MAHAQ06AA3 at three outdoor temperatures, in BTU per hour. Paired with D5MAHAQ06XA3: 7,700 at 5°F, 8,700 at 17°F, 7,000 at 47°F. Paired with 45MCCAQ06XA3: 8,100 at 5°F, 7,000 at 17°F, 7,400 at 47°F. Paired with 45MBDAQ06XA3: 7,800 at 5°F, 8,000 at 17°F, 8,000 at 47°F.
- HSPF214.80Btu/Wh, seasonal heating
- SEER225.70Btu/Wh, seasonal cooling
- COP at 5°F2.39at that test point
- Capacity at 5°F7,700BTU/h
- Share of 47°F capacity110.0%ours: 5°F ÷ 47°F
What these numbers are and are not. SEER2, EER2, HSPF2 and the COP at 5°F are results from a standard rating procedure, measured at fixed temperatures and airflow in a laboratory. They are not predictions for your house, your climate or your winter. Two systems with the same HSPF2 can use different amounts of electricity in the same building, and the same system will perform differently in Boston and in Atlanta. Use the published capacity at 5°F to judge whether a system still produces heat on a cold night; use HSPF2 only to compare systems with each other.
Midea 37MAHAQ06AA3 published specifications
| Outdoor unit | 37MAHAQ06AA3 |
|---|---|
| Indoor unit | D5MAHAQ06XA3 (D5M Series) |
| Cold-climate certified | Yes |
| ENERGY STAR Most Efficient | Yes |
| SEER2 | 25.70 Btu/Wh |
| EER2 | 18.00 Btu/Wh |
| HSPF2 | 14.80 Btu/Wh |
| Cooling capacity | 6,000 BTU/h |
| Heating capacity at 47°F | 7,000 BTU/h |
| Heating capacity at 17°F | 8,700 BTU/h |
| Heating capacity at 5°F | 7,700 BTU/h |
| COP at 5°F | 2.39 |
| Compressor staging | Continuously variable |
| Refrigerant | R-454B |
| Date certified | 2026-05-06 |
| ENERGY STAR ID / AHRI reference | 3555767 / 215323786 |
| 5°F capacity as a share of 47°F (ours) | 110.0% |
| Capacity class (ours) | 6,000 BTU/h nominal |
Source. ENERGY STAR Certified Heat Pumps, U.S. EPA, retrieved 2026-10-16 from the dataset's Socrata API. Record identified by ENERGY STAR ID 3555767, AHRI reference 215323786. Certification partner: Carrier Corporation. Model numbers are reproduced exactly as published, including the asterisks ENERGY STAR carries as the manufacturer's wildcard for trim variants.
Every certified pairing for this outdoor unit
ENERGY STAR certifies an outdoor unit together with a specific indoor unit, and the ratings change with the head it is matched to. The dataset lists 3 pairings for the 37MAHAQ06AA3, so the figures above apply only to the pairing named beside them.
| Indoor unit | SEER2 | HSPF2 | Cooling BTU/h | 47°F | 17°F | 5°F | COP 5°F | Cold-climate |
|---|---|---|---|---|---|---|---|---|
| D5MAHAQ06XA3 | 25.70 | 14.80 | 6,000 | 7,000 | 8,700 | 7,700 | 2.39 | Yes |
| 45MCCAQ06XA3 | 22.00 | 12.00 | 6,500 | 7,400 | 7,000 | 8,100 | 2.40 | Yes |
| 45MBDAQ06XA3 | 21.50 | 13.80 | 6,500 | 8,000 | 8,000 | 7,800 | 2.40 | Yes |
What the published capacities say about cold weather
A heat pump moves heat from outdoor air, so the colder that air gets, the less heat there is to move. The dataset publishes capacity at three outdoor temperatures, and the shape between them is the single most useful thing on this page. For the 37MAHAQ06AA3 paired with the D5MAHAQ06XA3:
- At 47°F it delivers 7,000 BTU/h.
- At 17°F it delivers 8,700 BTU/h.
- At 5°F it delivers 7,700 BTU/h, which is 110.0% of the 47°F figure.
That 5°F figure is higher than the 47°F figure. This is common in the dataset and is not an error in it: variable-speed systems are often rated at a maximum output at low temperature while the 47°F row reports a different operating point, and the dataset's own column metadata does not define which point each capacity represents. The figures are printed here as published, without correction, and the methodology page explains the gap.
ENERGY STAR lists this system as meeting its cold-climate criteria, which the program describes as better low-temperature heating performance, suitable for use as a home's sole heating source. That is the program's judgement on the published test data, not a promise about any particular winter or any particular house.
Running cost for a 6,000 BTU/h system like this one
Worked as an illustration, not a quote: a house that burned 600 therms of gas in a year through an 80% AFUE furnace needed about 48.0 million BTU of delivered heat. At $1.50 a therm that gas cost $900. Delivering the same heat with a heat pump rated at 14.80 HSPF2 takes 3,243 kWh, which at $0.18 a kWh costs $584. The two costs are equal at $0.278 a kWh.
Those four prices are not your prices, and HSPF2 is a rating-condition figure rather than a seasonal measurement for your climate. Change every input in the running-cost calculator, which shows each formula as it works.
Comparable systems
Same nominal capacity class (6,000 BTU/h), closest published HSPF2 to this one. Colour marks cold-climate certification.
-
PerfectAire 3PAMSHH06-SZO
Cold-climate
HSPF2 12.00 · SEER2 23.50 · 7,100 BTU/h at 5°F
-
MDV MOX230-09HFN1-MW5W
Cold-climate
HSPF2 10.80 · SEER2 22.00 · 8,000 BTU/h at 5°F
More: all 92 certified systems, or the explainer on SEER2 vs HSPF2.