Our take in 30 seconds
Best for: cold and very cold climatesStrengths
- Keeps 94% of its heat at 5°F, so backup heat rarely runs
- Heating efficiency (HSPF2 11.6) beats 96% of models
- Cooling efficiency up to SEER2 25.4, 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 20–25.4, so ask which pairing you're quoted
Running-cost calculator
Pre-filled with EIA prices · edit any fieldUses the base certified SEER2 (20) and HSPF2 (11.6). 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 Senville SENA-12HF-OG at the three ENERGY STAR test temperatures (cooling capacity is 12,000 BTU/h for reference).
Retention at 17°F: 96% · at 5°F: 94%. Learn how to use these numbers in our cold-climate guide.
Estimated running cost in every state
Same unit, very different bills: from about $252 a year in Louisiana to $977 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¢ | $97 | $154 | $252 |
| Florida | 14.99¢ | $73 | $216 | $289 |
| Mississippi | 14.43¢ | $140 | $156 | $296 |
| Washington | 14.63¢ | $268 | $31 | $299 |
| Nevada | 12.72¢ | $164 | $137 | $302 |
| Tennessee | 13.42¢ | $202 | $105 | $307 |
| Arizona | 15.05¢ | $114 | $199 | $312 |
| Oregon | 15.92¢ | $274 | $43 | $317 |
| North Carolina | 14.95¢ | $209 | $117 | $326 |
| Kentucky | 13.80¢ | $238 | $91 | $329 |
| Arkansas | 14.37¢ | $201 | $129 | $331 |
| South Carolina | 15.76¢ | $187 | $151 | $338 |
| Georgia | 15.90¢ | $188 | $153 | $341 |
| Utah | 13.31¢ | $273 | $72 | $344 |
| Texas | 15.91¢ | $154 | $191 | $345 |
| Alabama | 16.33¢ | $194 | $157 | $350 |
| Oklahoma | 14.82¢ | $224 | $133 | $357 |
| Idaho | 13.37¢ | $303 | $56 | $359 |
| New Mexico | 16.51¢ | $267 | $99 | $366 |
| Nebraska | 13.54¢ | $306 | $73 | $380 |
| West Virginia | 16.31¢ | $316 | $78 | $395 |
| Missouri | 16.02¢ | $293 | $106 | $399 |
| Virginia | 17.64¢ | $285 | $116 | $402 |
| Kansas | 15.47¢ | $300 | $102 | $402 |
| Wyoming | 14.43¢ | $389 | $43 | $432 |
| Colorado | 17.17¢ | $370 | $72 | $442 |
| North Dakota | 13.31¢ | $416 | $36 | $452 |
| Indiana | 17.02¢ | $367 | $87 | $454 |
| Delaware | 18.70¢ | $343 | $112 | $455 |
| Montana | 15.57¢ | $419 | $42 | $461 |
| California | 29.75¢ | $289 | $178 | $467 |
| South Dakota | 15.15¢ | $408 | $59 | $467 |
| Iowa | 17.06¢ | $423 | $77 | $500 |
| Ohio | 19.38¢ | $418 | $93 | $511 |
| Maryland | 21.40¢ | $392 | $128 | $520 |
| Illinois | 19.32¢ | $437 | $93 | $530 |
| Minnesota | 17.20¢ | $500 | $57 | $557 |
| Pennsylvania | 21.77¢ | $469 | $104 | $574 |
| Wisconsin | 19.41¢ | $523 | $70 | $593 |
| New Jersey | 24.61¢ | $477 | $133 | $610 |
| District of Columbia | 25.98¢ | $448 | $171 | $619 |
| Connecticut | 24.51¢ | $581 | $96 | $677 |
| Michigan | 22.99¢ | $595 | $83 | $677 |
| Vermont | 23.84¢ | $668 | $64 | $732 |
| Hawaii | 47.18¢ | $25 | $736 | $761 |
| Rhode Island | 28.18¢ | $668 | $101 | $770 |
| New York | 28.65¢ | $679 | $112 | $791 |
| New Hampshire | 27.64¢ | $745 | $83 | $828 |
| Massachusetts | 30.48¢ | $755 | $110 | $865 |
| Alaska | 29.41¢ | $951 | $18 | $968 |
| Maine | 32.11¢ | $900 | $77 | $977 |
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-OG 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 (−$32) | Compare |
| Bryant 37MAHAQ12AA3 | 12,000 | 20–25.5 | 11.6 | 96% | $433 (+$0) | Compare |
| Mitsubishi Electric PUZ-A12NKA7*** | 12,000 | 21.3–26.9 | 10.9 | 38% | $646 (+$213) | Compare |
| Payne 37MARAQ12AA3 | 12,000 | 19–25.5 | 11 | 74% | $443 (+$10) | Compare |
| Bryant 38MARBQ12AA3 | 12,000 | 19.5–25.5 | 10.7 | 97% | $462 (+$29) | Compare |
| Senville SENA/12HF/OQ | 12,000 | 19.5–25.5 | 10.7 | 97% | $462 (+$29) | Compare |
Full specifications
| Brand | Senville |
| Outdoor model | SENA-12HF-OG |
| Certified by | Senville Air Conditioners |
| Product type | Mini-split / multi-split |
| Compressor | Variable-speed (inverter) |
| Refrigerant | R-454B |
| Cooling capacity | 12,000 BTU/h |
| Nominal size | 1 ton |
| SEER2 (certified range) | 20 – 25.4 |
| EER2 (best) | 13.4 |
| HSPF2 (best) | 11.6 |
| Heating capacity @ 47°F | 12,500 BTU/h |
| Heating capacity @ 17°F | 12,000 BTU/h |
| Heating capacity @ 5°F | 11,800 BTU/h |
| COP @ 5°F | 2 |
| ENERGY STAR cold-climate | Yes |
| Certified indoor pairings | 5 |
| Latest certification | 2026-05 |
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-OG 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 $433 per year ($313 heating, $120 cooling). It ranges from about $252 in Louisiana to $977 in Maine.
Does the Senville SENA-12HF-OG work in cold weather?
Yes. It is ENERGY STAR cold-climate certified and delivers 11,800 BTU/h at 5°F, 94% of its 47°F capacity, with a COP of 2 at 5°F.
What size is the Senville SENA-12HF-OG?
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.