MXZ-SM42NAMHZ2
Mitsubishi Electric · HP - Mini or Multi Split
ENERGY STAR CertifiedAir-Source Heat Pumps →
SEER2
18–19.8BTU/Wh
HSPF2
10–10.6BTU/Wh
Cooling Capacity
42000BTU/hr
Cold Climate
Yes
Cold climate certified
GWP 2088 · high impactENERGY STAR Most Efficient
Mitsubishi Electric MXZ-SM42NAMHZ2: SEER2 19.8 BTU/Wh, around the middle of the range for air-source heat pumps (category median 20 BTU/Wh).
Where this model sits
Cooling42000BTU/hr
6000median 2400060000
SEER219.8BTU/Wh
15.2median 2035.1
The Mitsubishi Electric MXZ-SM42NAMHZ2 is a 42000 BTU/hr hp - mini or multi split using R-410A, a refrigerant with high global warming potential (GWP 2088). At 19.8 BTU/Wh it ranks around the middle of the 12,218 certified air-source heat pumps models. Among similar-sized air-source heat pumps (within 10% of its size), it is more efficient than the peer median of 16 BTU/Wh.
Specifications
| Efficiency | |
|---|---|
| SEER2 (best combination) | 19.8BTU/Wh |
| SEER2 (worst combination) | 18BTU/Wh |
| HSPF2 (best combination) | 10.6BTU/Wh |
| HSPF2 (worst combination) | 10BTU/Wh |
| EER2 (best combination) | 12BTU/Wh |
| COP at 5 °F | 1.92 |
| Capacity | |
| Cooling Capacity (max) | 42000BTU/hr |
| Cooling Capacity (min) | 42000BTU/hr |
| Heating at 47 °F | 48000BTU/hr |
| Heating at 17 °F | 32000BTU/hr |
| Heating at 5 °F | 44000BTU/hr |
All 25 specifications
| Configuration | |
|---|---|
| Product Type | HP - Mini or Multi Split |
| Compressor Staging | Continuously variable |
| Cold Climate Certified | Yes |
| Connected Capability | No |
| Series | Smart Multi |
| Indoor-Unit Combinations Rated | 2 |
| Refrigerant | |
| Type | R-410A |
| GWP Rating | R-410A (GWP:2088) |
| Identifiers | |
| Model Number | MXZ-SM42NAMHZ2 |
| ENERGY STAR ID | ES_14817_MXZ-SM42NAMHZ2_12282023194939_5995791 |
| Partner | Mitsubishi Electric U.S. HVAC Division |
| Date Certified | 2026-04-17 |
| Available From | 2026-04-07 |
| Markets | United States |
Documentation
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