Our take in 30 seconds
Best for: mild climates or homes with backup heatStrengths
- Heating efficiency (HSPF2 10.6) beats 87% of models
- Variable-speed compressor: quieter, steadier temperatures and better humidity control
- Uses newer, lower-impact R-454B refrigerant
Good to know
- Only 54% of its heat output remains at 5°F; plan on backup heat in hard freezes
Running-cost calculator
Pre-filled with EIA prices · edit any fieldUses the base certified SEER2 (16.2) and HSPF2 (10.6). 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-AA18NL*** at the three ENERGY STAR test temperatures (cooling capacity is 18,000 BTU/h for reference).
Retention at 17°F: 67% · at 5°F: 54%. Learn how to use these numbers in our cold-climate guide.
Estimated running cost in every state
Same unit, very different bills: from about $456 a year in Louisiana to $1,718 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¢ | $170 | $286 | $456 |
| Washington | 14.63¢ | $469 | $57 | $526 |
| Florida | 14.99¢ | $127 | $400 | $527 |
| Mississippi | 14.43¢ | $245 | $289 | $534 |
| Nevada | 12.72¢ | $288 | $254 | $542 |
| Tennessee | 13.42¢ | $354 | $194 | $548 |
| Oregon | 15.92¢ | $481 | $80 | $560 |
| Arizona | 15.05¢ | $199 | $368 | $567 |
| North Carolina | 14.95¢ | $367 | $216 | $583 |
| Kentucky | 13.80¢ | $417 | $169 | $585 |
| Arkansas | 14.37¢ | $352 | $240 | $592 |
| South Carolina | 15.76¢ | $327 | $280 | $607 |
| Utah | 13.31¢ | $477 | $133 | $610 |
| Georgia | 15.90¢ | $330 | $283 | $613 |
| Texas | 15.91¢ | $270 | $354 | $624 |
| Alabama | 16.33¢ | $339 | $290 | $629 |
| Idaho | 13.37¢ | $530 | $104 | $634 |
| Oklahoma | 14.82¢ | $391 | $247 | $638 |
| New Mexico | 16.51¢ | $467 | $183 | $651 |
| Nebraska | 13.54¢ | $536 | $135 | $672 |
| West Virginia | 16.31¢ | $554 | $145 | $699 |
| Missouri | 16.02¢ | $514 | $196 | $710 |
| Kansas | 15.47¢ | $525 | $189 | $714 |
| Virginia | 17.64¢ | $499 | $216 | $715 |
| Wyoming | 14.43¢ | $681 | $80 | $761 |
| Colorado | 17.17¢ | $648 | $134 | $781 |
| North Dakota | 13.31¢ | $728 | $67 | $795 |
| Indiana | 17.02¢ | $642 | $161 | $803 |
| Delaware | 18.70¢ | $600 | $208 | $808 |
| Montana | 15.57¢ | $734 | $78 | $812 |
| South Dakota | 15.15¢ | $715 | $109 | $824 |
| California | 29.75¢ | $505 | $331 | $836 |
| Iowa | 17.06¢ | $740 | $142 | $883 |
| Ohio | 19.38¢ | $731 | $172 | $904 |
| Maryland | 21.40¢ | $686 | $238 | $924 |
| Illinois | 19.32¢ | $766 | $172 | $937 |
| Minnesota | 17.20¢ | $876 | $105 | $981 |
| Pennsylvania | 21.77¢ | $822 | $194 | $1,015 |
| Wisconsin | 19.41¢ | $916 | $129 | $1,045 |
| New Jersey | 24.61¢ | $836 | $246 | $1,082 |
| District of Columbia | 25.98¢ | $784 | $318 | $1,102 |
| Michigan | 22.99¢ | $1,041 | $153 | $1,194 |
| Connecticut | 24.51¢ | $1,017 | $177 | $1,194 |
| Vermont | 23.84¢ | $1,170 | $119 | $1,289 |
| Rhode Island | 28.18¢ | $1,170 | $188 | $1,358 |
| New York | 28.65¢ | $1,189 | $207 | $1,396 |
| Hawaii | 47.18¢ | $45 | $1,363 | $1,407 |
| New Hampshire | 27.64¢ | $1,304 | $154 | $1,457 |
| Massachusetts | 30.48¢ | $1,323 | $203 | $1,526 |
| Alaska | 29.41¢ | $1,665 | $33 | $1,697 |
| Maine | 32.11¢ | $1,575 | $143 | $1,718 |
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-AA18NL*** at U.S.-average rates.
| Model | Cooling BTU/h | SEER2 | HSPF2 | 5°F kept | Est. yearly cost | |
|---|---|---|---|---|---|---|
| Bryant 37MARAQ18AA3 | 18,000 | 20–23.9 | 13.5 | 71% | $610 (−$160) | Compare |
| Bryant 37MAHAQ18AA3 | 18,000 | 18–21.5 | 12.4 | 90% | $668 (−$102) | Compare |
| Senville SENA-18HF-OG | 18,000 | 18–21.4 | 12.3 | 90% | $672 (−$98) | Compare |
| Fujitsu AOUH18KUAS1 | 18,000 | 18.6–26.3 | 11.4 | 82% | $744 (−$26) | Compare |
| Fujitsu AOUH18LUAS1 | 18,000 | 18.6–23.5 | 11.2 | 95% | $660 (−$110) | Compare |
| Senville SENA/18HF/OQ | 18,000 | 18–21.5 | 11.3 | 95% | $688 (−$82) | Compare |
Full specifications
| Brand | Mitsubishi Electric |
| Outdoor model | SUZ-AA18NL*** |
| Certified by | Mitsubishi Electric U.S. HVAC Division |
| Product type | Mini-split / multi-split |
| Compressor | Variable-speed (inverter) |
| Refrigerant | R-454B |
| Cooling capacity | 18,000 BTU/h |
| Nominal size | 1.5 tons |
| SEER2 (certified range) | 16.2 – 17.5 |
| EER2 (best) | 12.8 |
| HSPF2 (best) | 10.6 |
| Heating capacity @ 47°F | 20,000 BTU/h |
| Heating capacity @ 17°F | 13,400 BTU/h |
| Heating capacity @ 5°F | 10,700 BTU/h |
| COP @ 5°F | 3 |
| ENERGY STAR cold-climate | No |
| Certified indoor pairings | 12 |
| 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-AA18NL*** 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 $770 per year ($548 heating, $222 cooling). It ranges from about $456 in Louisiana to $1,718 in Maine.
Does the Mitsubishi Electric SUZ-AA18NL*** work in cold weather?
It is not ENERGY STAR cold-climate certified. It delivers 10,700 BTU/h at 5°F (54% of its 47°F capacity), so in very cold climates expect more reliance on backup heat.
What size is the Mitsubishi Electric SUZ-AA18NL***?
It is rated at 18,000 BTU/h of cooling, roughly 1.5 tons, and 20,000 BTU/h of heating at 47°F. Proper sizing should be confirmed with a Manual J load calculation.