Our take in 30 seconds
Best for: cold and very cold climatesStrengths
- Keeps 89% of its heat at 5°F, so backup heat rarely runs
- Heating efficiency (HSPF2 11.5) beats 95% of models
- Cooling efficiency up to SEER2 25, better than 94% of models
- Variable-speed compressor: quieter, steadier temperatures and better humidity control
Good to know
- Efficiency depends on the indoor unit: SEER2 ranges 19.1–25, so ask which pairing you're quoted
Running-cost calculator
Pre-filled with EIA prices · edit any fieldUses the base certified SEER2 (19.1) and HSPF2 (11.5). 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 Fujitsu AOUH12KUBS1 at the three ENERGY STAR test temperatures (cooling capacity is 14,200 BTU/h for reference).
Retention at 17°F: 66% · at 5°F: 89%. Learn how to use these numbers in our cold-climate guide.
Estimated running cost in every state
Same unit, very different bills: from about $332 a year in Louisiana to $1,403 in Alaska, 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¢ | $141 | $191 | $332 |
| Florida | 14.99¢ | $106 | $267 | $373 |
| Mississippi | 14.43¢ | $203 | $193 | $396 |
| Nevada | 12.72¢ | $239 | $170 | $409 |
| Arizona | 15.05¢ | $165 | $246 | $411 |
| Tennessee | 13.42¢ | $294 | $130 | $424 |
| Washington | 14.63¢ | $389 | $38 | $427 |
| North Carolina | 14.95¢ | $304 | $144 | $449 |
| Oregon | 15.92¢ | $399 | $53 | $452 |
| Arkansas | 14.37¢ | $292 | $160 | $453 |
| Kentucky | 13.80¢ | $346 | $113 | $458 |
| South Carolina | 15.76¢ | $271 | $187 | $459 |
| Texas | 15.91¢ | $224 | $237 | $461 |
| Georgia | 15.90¢ | $274 | $189 | $463 |
| Alabama | 16.33¢ | $281 | $194 | $475 |
| Utah | 13.31¢ | $396 | $89 | $485 |
| Oklahoma | 14.82¢ | $325 | $165 | $490 |
| Idaho | 13.37¢ | $439 | $70 | $509 |
| New Mexico | 16.51¢ | $388 | $123 | $510 |
| Nebraska | 13.54¢ | $445 | $91 | $536 |
| West Virginia | 16.31¢ | $460 | $97 | $557 |
| Missouri | 16.02¢ | $426 | $131 | $557 |
| Virginia | 17.64¢ | $414 | $144 | $558 |
| Kansas | 15.47¢ | $436 | $127 | $562 |
| Wyoming | 14.43¢ | $565 | $54 | $618 |
| Colorado | 17.17¢ | $537 | $89 | $627 |
| Delaware | 18.70¢ | $498 | $139 | $637 |
| California | 29.75¢ | $419 | $221 | $640 |
| Indiana | 17.02¢ | $533 | $108 | $640 |
| North Dakota | 13.31¢ | $604 | $45 | $649 |
| Montana | 15.57¢ | $609 | $52 | $661 |
| South Dakota | 15.15¢ | $593 | $73 | $666 |
| Iowa | 17.06¢ | $614 | $95 | $709 |
| Ohio | 19.38¢ | $607 | $115 | $722 |
| Maryland | 21.40¢ | $569 | $159 | $729 |
| Illinois | 19.32¢ | $635 | $115 | $750 |
| Minnesota | 17.20¢ | $727 | $70 | $797 |
| Pennsylvania | 21.77¢ | $681 | $129 | $811 |
| Wisconsin | 19.41¢ | $760 | $87 | $846 |
| New Jersey | 24.61¢ | $693 | $165 | $858 |
| District of Columbia | 25.98¢ | $651 | $212 | $863 |
| Hawaii | 47.18¢ | $37 | $912 | $949 |
| Connecticut | 24.51¢ | $844 | $118 | $962 |
| Michigan | 22.99¢ | $864 | $103 | $966 |
| Vermont | 23.84¢ | $970 | $80 | $1,050 |
| Rhode Island | 28.18¢ | $970 | $126 | $1,096 |
| New York | 28.65¢ | $987 | $138 | $1,125 |
| New Hampshire | 27.64¢ | $1,082 | $103 | $1,184 |
| Massachusetts | 30.48¢ | $1,097 | $136 | $1,233 |
| Maine | 32.11¢ | $1,307 | $95 | $1,402 |
| Alaska | 29.41¢ | $1,381 | $22 | $1,403 |
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 Fujitsu AOUH12KUBS1 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 (−$113) | Compare |
| Fujitsu AOUH12KUAH1 | 14,200 | 19.1–25 | 11.5 | 103% | $603 (+$0) | Compare |
| Mitsubishi Electric SUZ-AA15NL*** | 15,000 | 18.8–20.9 | 10.6 | 55% | $653 (+$49) | Compare |
| Mitsubishi Electric SUZ-AA15NLHZ*** | 15,000 | 16.2–17.5 | 10.2 | 100% | $698 (+$94) | Compare |
Full specifications
| Brand | Fujitsu |
| Outdoor model | AOUH12KUBS1 |
| Certified by | Fujitsu General America, Inc. |
| Product type | Mini-split / multi-split |
| Compressor | Variable-speed (inverter) |
| Refrigerant | R-32 |
| Cooling capacity | 14,200 BTU/h |
| Nominal size | 1 ton |
| SEER2 (certified range) | 19.1 – 25 |
| EER2 (best) | 14.1 |
| HSPF2 (best) | 11.5 |
| Heating capacity @ 47°F | 18,000 BTU/h |
| Heating capacity @ 17°F | 11,800 BTU/h |
| Heating capacity @ 5°F | 16,100 BTU/h |
| COP @ 5°F | 2.12 |
| ENERGY STAR cold-climate | Yes |
| Certified indoor pairings | 6 |
| Latest certification | 2026-09 |
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 Fujitsu AOUH12KUBS1 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 $603 per year ($455 heating, $149 cooling). It ranges from about $332 in Louisiana to $1,403 in Alaska.
Does the Fujitsu AOUH12KUBS1 work in cold weather?
Yes. It is ENERGY STAR cold-climate certified and delivers 16,100 BTU/h at 5°F, 89% of its 47°F capacity, with a COP of 2.12 at 5°F.
What size is the Fujitsu AOUH12KUBS1?
It is rated at 14,200 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.