Our take in 30 seconds
Best for: cold and very cold climatesStrengths
- Keeps 97% of its heat at 5°F, so backup heat rarely runs
- Heating efficiency (HSPF2 10.7) beats 88% of models
- Cooling efficiency up to SEER2 25.5, better than 95% of models
- Variable-speed compressor: quieter, steadier temperatures and better humidity control
Good to know
- Uses R-410A, a refrigerant being phased down; future service may cost more
- Efficiency depends on the indoor unit: SEER2 ranges 19.5–25.5, so ask which pairing you're quoted
Running-cost calculator
Pre-filled with EIA prices · edit any fieldUses the base certified SEER2 (19.5) and HSPF2 (10.7). 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 Senville SENA/12HF/OQ at the three ENERGY STAR test temperatures (cooling capacity is 12,000 BTU/h for reference).
Retention at 17°F: 85% · at 5°F: 97%. Learn how to use these numbers in our cold-climate guide.
Estimated running cost in every state
Same unit, very different bills: from about $264 a year in Louisiana to $1,054 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¢ | $105 | $158 | $264 |
| Florida | 14.99¢ | $79 | $221 | $300 |
| Mississippi | 14.43¢ | $152 | $160 | $312 |
| Nevada | 12.72¢ | $178 | $141 | $319 |
| Washington | 14.63¢ | $291 | $32 | $322 |
| Arizona | 15.05¢ | $123 | $204 | $327 |
| Tennessee | 13.42¢ | $219 | $107 | $327 |
| Oregon | 15.92¢ | $298 | $44 | $342 |
| North Carolina | 14.95¢ | $227 | $120 | $347 |
| Arkansas | 14.37¢ | $218 | $133 | $351 |
| Kentucky | 13.80¢ | $258 | $93 | $351 |
| South Carolina | 15.76¢ | $203 | $155 | $358 |
| Georgia | 15.90¢ | $204 | $157 | $361 |
| Texas | 15.91¢ | $167 | $196 | $363 |
| Utah | 13.31¢ | $295 | $74 | $369 |
| Alabama | 16.33¢ | $210 | $161 | $371 |
| Oklahoma | 14.82¢ | $242 | $137 | $379 |
| Idaho | 13.37¢ | $328 | $58 | $386 |
| New Mexico | 16.51¢ | $289 | $102 | $391 |
| Nebraska | 13.54¢ | $332 | $75 | $407 |
| West Virginia | 16.31¢ | $343 | $80 | $423 |
| Missouri | 16.02¢ | $318 | $108 | $427 |
| Virginia | 17.64¢ | $309 | $119 | $429 |
| Kansas | 15.47¢ | $325 | $105 | $430 |
| Wyoming | 14.43¢ | $421 | $44 | $466 |
| Colorado | 17.17¢ | $401 | $74 | $475 |
| Delaware | 18.70¢ | $371 | $115 | $486 |
| Indiana | 17.02¢ | $398 | $89 | $487 |
| North Dakota | 13.31¢ | $451 | $37 | $488 |
| California | 29.75¢ | $313 | $183 | $496 |
| Montana | 15.57¢ | $455 | $43 | $498 |
| South Dakota | 15.15¢ | $442 | $61 | $503 |
| Iowa | 17.06¢ | $458 | $79 | $537 |
| Ohio | 19.38¢ | $453 | $95 | $548 |
| Maryland | 21.40¢ | $425 | $132 | $557 |
| Illinois | 19.32¢ | $474 | $95 | $569 |
| Minnesota | 17.20¢ | $543 | $58 | $601 |
| Pennsylvania | 21.77¢ | $509 | $107 | $616 |
| Wisconsin | 19.41¢ | $567 | $72 | $639 |
| New Jersey | 24.61¢ | $518 | $136 | $654 |
| District of Columbia | 25.98¢ | $486 | $176 | $661 |
| Connecticut | 24.51¢ | $630 | $98 | $728 |
| Michigan | 22.99¢ | $645 | $85 | $729 |
| Hawaii | 47.18¢ | $28 | $755 | $782 |
| Vermont | 23.84¢ | $724 | $66 | $790 |
| Rhode Island | 28.18¢ | $724 | $104 | $828 |
| New York | 28.65¢ | $736 | $115 | $851 |
| New Hampshire | 27.64¢ | $807 | $85 | $892 |
| Massachusetts | 30.48¢ | $819 | $113 | $932 |
| Alaska | 29.41¢ | $1,031 | $18 | $1,049 |
| Maine | 32.11¢ | $975 | $79 | $1,054 |
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 Senville SENA/12HF/OQ at U.S.-average rates.
| Model | Cooling BTU/h | SEER2 | HSPF2 | 5°F kept | Est. yearly cost | |
|---|---|---|---|---|---|---|
| Fujitsu AOUH12KTAP1 | 12,000 | 31.5–31.5 | 13.7 | 106% | $401 (−$62) | Compare |
| Bryant 37MAHAQ12AA3 | 12,000 | 20–25.5 | 11.6 | 96% | $433 (−$29) | Compare |
| Senville SENA-12HF-OG | 12,000 | 20–25.4 | 11.6 | 94% | $433 (−$29) | Compare |
| Mitsubishi Electric PUZ-A12NKA7*** | 12,000 | 21.3–26.9 | 10.9 | 38% | $646 (+$183) | Compare |
| Payne 37MARAQ12AA3 | 12,000 | 19–25.5 | 11 | 74% | $443 (−$19) | Compare |
| Bryant 38MARBQ12AA3 | 12,000 | 19.5–25.5 | 10.7 | 97% | $462 (+$0) | Compare |
Full specifications
| Brand | Senville |
| Outdoor model | SENA/12HF/OQ |
| Certified by | Senville Air Conditioners |
| Product type | Mini-split / multi-split |
| Compressor | Variable-speed (inverter) |
| Refrigerant | R-410A |
| Cooling capacity | 12,000 BTU/h |
| Nominal size | 1 ton |
| SEER2 (certified range) | 19.5 – 25.5 |
| EER2 (best) | 14 |
| HSPF2 (best) | 10.7 |
| Heating capacity @ 47°F | 12,500 BTU/h |
| Heating capacity @ 17°F | 10,600 BTU/h |
| Heating capacity @ 5°F | 12,100 BTU/h |
| COP @ 5°F | 1.99 |
| ENERGY STAR cold-climate | Yes |
| Certified indoor pairings | 7 |
| 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 Senville SENA/12HF/OQ 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 $462 per year ($339 heating, $123 cooling). It ranges from about $264 in Louisiana to $1,054 in Maine.
Does the Senville SENA/12HF/OQ work in cold weather?
Yes. It is ENERGY STAR cold-climate certified and delivers 12,100 BTU/h at 5°F, 97% of its 47°F capacity, with a COP of 1.99 at 5°F.
What size is the Senville SENA/12HF/OQ?
It is rated at 12,000 BTU/h of cooling, roughly 1 ton, and 12,500 BTU/h of heating at 47°F. Proper sizing should be confirmed with a Manual J load calculation.