Our take in 30 seconds
Best for: cold and very cold climatesStrengths
- Keeps 100% of its heat at 5°F, so backup heat rarely runs
- Heating efficiency (HSPF2 10.2) beats 78% of models
- Variable-speed compressor: quieter, steadier temperatures and better humidity control
- Uses newer, lower-impact R-454B refrigerant
Good to know
- No notable drawbacks in the certified data.
Running-cost calculator
Pre-filled with EIA prices · edit any fieldUses the base certified SEER2 (16.2) and HSPF2 (10.2). Assumes the unit is correctly sized. How we calculate.
Heating capacity as it gets colder
A heat pump's output falls as outdoor temperature drops. This is the certified heat output of the Mitsubishi Electric SUZ-AA15NLHZ*** at the three ENERGY STAR test temperatures (cooling capacity is 15,000 BTU/h for reference).
Retention at 17°F: 65% · at 5°F: 100%. Learn how to use these numbers in our cold-climate guide.
Estimated running cost in every state
Same unit, very different bills: from about $397 a year in Louisiana to $1,592 in Maine, driven by local electricity prices and how much heating or cooling the climate needs. Click a column to sort.
| State | Price | Heating | Cooling | Total / yr |
|---|---|---|---|---|
| Louisiana | 12.87¢ | $159 | $238 | $397 |
| Florida | 14.99¢ | $119 | $333 | $452 |
| Mississippi | 14.43¢ | $229 | $240 | $470 |
| Nevada | 12.72¢ | $269 | $212 | $481 |
| Washington | 14.63¢ | $439 | $47 | $486 |
| Arizona | 15.05¢ | $186 | $307 | $492 |
| Tennessee | 13.42¢ | $332 | $162 | $493 |
| Oregon | 15.92¢ | $450 | $66 | $516 |
| North Carolina | 14.95¢ | $343 | $180 | $523 |
| Arkansas | 14.37¢ | $330 | $200 | $529 |
| Kentucky | 13.80¢ | $390 | $141 | $530 |
| South Carolina | 15.76¢ | $306 | $233 | $539 |
| Georgia | 15.90¢ | $309 | $236 | $544 |
| Texas | 15.91¢ | $253 | $295 | $547 |
| Utah | 13.31¢ | $446 | $111 | $557 |
| Alabama | 16.33¢ | $317 | $242 | $559 |
| Oklahoma | 14.82¢ | $366 | $206 | $572 |
| Idaho | 13.37¢ | $495 | $87 | $582 |
| New Mexico | 16.51¢ | $437 | $153 | $590 |
| Nebraska | 13.54¢ | $502 | $113 | $615 |
| West Virginia | 16.31¢ | $518 | $121 | $639 |
| Missouri | 16.02¢ | $481 | $163 | $644 |
| Virginia | 17.64¢ | $467 | $180 | $647 |
| Kansas | 15.47¢ | $491 | $158 | $649 |
| Wyoming | 14.43¢ | $637 | $67 | $703 |
| Colorado | 17.17¢ | $606 | $111 | $717 |
| Delaware | 18.70¢ | $561 | $173 | $734 |
| Indiana | 17.02¢ | $601 | $134 | $735 |
| North Dakota | 13.31¢ | $681 | $55 | $737 |
| California | 29.75¢ | $472 | $275 | $748 |
| Montana | 15.57¢ | $687 | $65 | $752 |
| South Dakota | 15.15¢ | $668 | $91 | $760 |
| Iowa | 17.06¢ | $692 | $118 | $811 |
| Ohio | 19.38¢ | $684 | $144 | $828 |
| Maryland | 21.40¢ | $642 | $198 | $840 |
| Illinois | 19.32¢ | $716 | $143 | $859 |
| Minnesota | 17.20¢ | $820 | $88 | $907 |
| Pennsylvania | 21.77¢ | $768 | $161 | $930 |
| Wisconsin | 19.41¢ | $856 | $108 | $964 |
| New Jersey | 24.61¢ | $782 | $205 | $987 |
| District of Columbia | 25.98¢ | $734 | $265 | $998 |
| Connecticut | 24.51¢ | $952 | $148 | $1,099 |
| Michigan | 22.99¢ | $974 | $128 | $1,101 |
| Hawaii | 47.18¢ | $42 | $1,136 | $1,177 |
| Vermont | 23.84¢ | $1,094 | $99 | $1,193 |
| Rhode Island | 28.18¢ | $1,094 | $157 | $1,251 |
| New York | 28.65¢ | $1,112 | $172 | $1,285 |
| New Hampshire | 27.64¢ | $1,219 | $128 | $1,347 |
| Massachusetts | 30.48¢ | $1,237 | $169 | $1,406 |
| Alaska | 29.41¢ | $1,557 | $27 | $1,584 |
| Maine | 32.11¢ | $1,473 | $119 | $1,592 |
Similar-size alternatives
Other mini-split / multi-split units within ±15% of this model's cooling capacity, sorted by efficiency. Cost difference is versus the Mitsubishi Electric SUZ-AA15NLHZ*** at U.S.-average rates.
| Model | Cooling BTU/h | SEER2 | HSPF2 | 5°F kept | Est. yearly cost | |
|---|---|---|---|---|---|---|
| Fujitsu AOUH15KTAP1 | 14,500 | 28.7–28.7 | 13 | 106% | $490 (−$208) | Compare |
| Fujitsu AOUH12KUAH1 | 14,200 | 19.1–25 | 11.5 | 103% | $603 (−$94) | Compare |
| Fujitsu AOUH12KUBS1 | 14,200 | 19.1–25 | 11.5 | 89% | $603 (−$94) | Compare |
| Mitsubishi Electric SUZ-AA15NL*** | 15,000 | 18.8–20.9 | 10.6 | 55% | $653 (−$45) | Compare |
Full specifications
| Brand | Mitsubishi Electric |
| Outdoor model | SUZ-AA15NLHZ*** |
| Certified by | Mitsubishi Electric U.S. HVAC Division |
| Product type | Mini-split / multi-split |
| Compressor | Variable-speed (inverter) |
| Refrigerant | R-454B |
| Cooling capacity | 15,000 BTU/h |
| Nominal size | 1 ton |
| SEER2 (certified range) | 16.2 – 17.5 |
| EER2 (best) | 13 |
| HSPF2 (best) | 10.2 |
| Heating capacity @ 47°F | 18,000 BTU/h |
| Heating capacity @ 17°F | 11,700 BTU/h |
| Heating capacity @ 5°F | 18,000 BTU/h |
| COP @ 5°F | 2 |
| ENERGY STAR cold-climate | Yes |
| Certified indoor pairings | 10 |
| Latest certification | 2026-06 |
Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), retrieved November 7, 2026. Capacities and HSPF2 are the highest values across certified pairings; confirm your exact system's AHRI reference number with your installer.
Frequently asked questions
How much does the Mitsubishi Electric SUZ-AA15NLHZ*** cost to run per year?
At the U.S. average residential electricity price of 18.16¢/kWh and typical national heating and cooling hours, we estimate about $698 per year ($513 heating, $185 cooling). It ranges from about $397 in Louisiana to $1,592 in Maine.
Does the Mitsubishi Electric SUZ-AA15NLHZ*** work in cold weather?
Yes. It is ENERGY STAR cold-climate certified and delivers 18,000 BTU/h at 5°F, 100% of its 47°F capacity, with a COP of 2 at 5°F.
What size is the Mitsubishi Electric SUZ-AA15NLHZ***?
It is rated at 15,000 BTU/h of cooling, roughly 1 ton, and 18,000 BTU/h of heating at 47°F. Proper sizing should be confirmed with a Manual J load calculation.