Mitsubishi Electric MXZ-SM42NLHZ
EPA category: Mini or Multi Split · 42,000 Btu/h class · variable-speed · R-454B (GWP:470 | Lower GWP)
Model number as listed: MXZ-SM42NLHZ*** · Series as listed: City Multi and Smart Multi
Among the 43 rated 42,000 Btu/h mini- and multi-split outdoor units on this site, the Mitsubishi Electric MXZ-SM42NLHZ lists the joint second-highest HSPF2. The MXZ-SM42NLHZ also lists the joint third-highest EER2 and the joint highest heating capacity at 5°F. The Mitsubishi Electric MXZ-SM42NAMHZ2 (SEER2 21.5) lists the same HSPF2.
Place in the 42,000 Btu/h class
EPA cold-climate designation: Yes, for all 3 certified matches. About the designation.
Its neighbors at 5°F
| Product | Kept at 5°F | Output, Btu/h | COP at 5°F | HSPF2 |
|---|---|---|---|---|
| MDV M5OG-42HFN1-M | 102% | 44,000 | 2.00 | 10.5 |
| Fujitsu AOUH42KUAH1 | 102% | 48,000 | 2.02 | 10.6 |
| Mitsubishi Electric MXZ-SM42NLHZ | 100% | 48,000 | 2.00 | 11.1 |
| Daikin 5MXT40AVJU | 95% | 38,000 | 1.90 | 9.5 |
| LG KUMXA421A | 92% | 44,000 | 2.00 | 11 |
| Mitsubishi Electric MXZ-SM42NAMHZ2 (SEER2 19.75) | 92% | 44,000 | 1.92 | 10.55 |
| Mitsubishi Electric MXZ-SM42NAMHZ2 (SEER2 21.5) | 92% | 44,000 | 2.00 | 11.1 |
| LG KUSXA421A | 91% | 43,500 | 2.20 | 10.8 |
| Boreal MUL42HPJ132OA | 90% | 37,800 | 2.10 | 10 |
Top of the 42,000 Btu/h class on HSPF2
| Place | Product | HSPF2 |
|---|---|---|
| 1st | Toshiba Carrier RAV-BP421AT2P-UL | 11.2 |
| joint 2nd | Mitsubishi Electric MXZ-SM42NAMHZ2 (SEER2 21.5) | 11.1 |
| joint 2nd | Mitsubishi Electric MXZ-SM42NLHZ | 11.1 |
| 4th | LG KUMXA421A | 11 |
| joint 5th | LG KUSXA421A | 10.8 |
Its certified matches (3)
Paired with 0 different indoor models. Its lowest-rated match lists SEER2 17, HSPF2 10 and 100% of 47°F capacity at 5°F.
| Match with the top | Indoor unit | Furnace | AHRI reference |
|---|---|---|---|
| HSPF2, SEER2, EER2, and COP at 5°F | not named | none | 215685465 |
| Kept at 5°F and Output at 5°F | not named | none | 215712163 |
Same ratings, 3 listings
- Mitsubishi Electric MXZ-SM42NLHZ
- Mitsubishi Electric MXZ-SM42NLHZ
- Mitsubishi Electric PUMY-HL42NKMU
Certified as of October 27, 2026; on the market since 2025-08.