Our take in 30 seconds
Best for: cold and very cold climatesStrengths
- Keeps 83% of its heat at 5°F, so backup heat rarely runs
- Heating efficiency (HSPF2 13.5) beats 99% of models
- Cooling efficiency up to SEER2 21, better than 76% of models
- Variable-speed compressor: quieter, steadier temperatures and better humidity control
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 (19) and HSPF2 (13.5). 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 Senville SENA-24HF-OG at the three ENERGY STAR test temperatures (cooling capacity is 24,000 BTU/h for reference).
Retention at 17°F: 77% · at 5°F: 83%. Learn how to use these numbers in our cold-climate guide.
Estimated running cost in every state
Same unit, very different bills: from about $519 a year in Louisiana to $1,956 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¢ | $194 | $325 | $519 |
| Washington | 14.63¢ | $534 | $65 | $599 |
| Florida | 14.99¢ | $145 | $454 | $599 |
| Mississippi | 14.43¢ | $279 | $328 | $607 |
| Nevada | 12.72¢ | $328 | $289 | $617 |
| Tennessee | 13.42¢ | $404 | $220 | $624 |
| Oregon | 15.92¢ | $547 | $90 | $638 |
| Arizona | 15.05¢ | $226 | $418 | $645 |
| North Carolina | 14.95¢ | $417 | $245 | $663 |
| Kentucky | 13.80¢ | $474 | $192 | $666 |
| Arkansas | 14.37¢ | $401 | $272 | $674 |
| South Carolina | 15.76¢ | $372 | $319 | $691 |
| Utah | 13.31¢ | $543 | $151 | $695 |
| Georgia | 15.90¢ | $376 | $321 | $697 |
| Texas | 15.91¢ | $308 | $402 | $710 |
| Alabama | 16.33¢ | $386 | $330 | $716 |
| Idaho | 13.37¢ | $603 | $118 | $721 |
| Oklahoma | 14.82¢ | $446 | $281 | $726 |
| New Mexico | 16.51¢ | $532 | $209 | $741 |
| Nebraska | 13.54¢ | $611 | $154 | $765 |
| West Virginia | 16.31¢ | $631 | $165 | $795 |
| Missouri | 16.02¢ | $585 | $223 | $808 |
| Kansas | 15.47¢ | $598 | $215 | $813 |
| Virginia | 17.64¢ | $568 | $245 | $814 |
| Wyoming | 14.43¢ | $775 | $91 | $866 |
| Colorado | 17.17¢ | $738 | $152 | $889 |
| North Dakota | 13.31¢ | $829 | $76 | $905 |
| Indiana | 17.02¢ | $731 | $183 | $914 |
| Delaware | 18.70¢ | $683 | $236 | $919 |
| Montana | 15.57¢ | $836 | $89 | $925 |
| South Dakota | 15.15¢ | $814 | $124 | $938 |
| California | 29.75¢ | $575 | $376 | $951 |
| Iowa | 17.06¢ | $843 | $162 | $1,005 |
| Ohio | 19.38¢ | $833 | $196 | $1,028 |
| Maryland | 21.40¢ | $781 | $270 | $1,052 |
| Illinois | 19.32¢ | $872 | $195 | $1,067 |
| Minnesota | 17.20¢ | $998 | $119 | $1,117 |
| Pennsylvania | 21.77¢ | $935 | $220 | $1,155 |
| Wisconsin | 19.41¢ | $1,042 | $147 | $1,189 |
| New Jersey | 24.61¢ | $952 | $280 | $1,231 |
| District of Columbia | 25.98¢ | $893 | $361 | $1,254 |
| Michigan | 22.99¢ | $1,185 | $174 | $1,360 |
| Connecticut | 24.51¢ | $1,158 | $201 | $1,360 |
| Vermont | 23.84¢ | $1,332 | $136 | $1,467 |
| Rhode Island | 28.18¢ | $1,332 | $214 | $1,545 |
| New York | 28.65¢ | $1,354 | $235 | $1,589 |
| Hawaii | 47.18¢ | $51 | $1,549 | $1,600 |
| New Hampshire | 27.64¢ | $1,484 | $175 | $1,659 |
| Massachusetts | 30.48¢ | $1,506 | $231 | $1,737 |
| Alaska | 29.41¢ | $1,895 | $37 | $1,932 |
| Maine | 32.11¢ | $1,793 | $162 | $1,956 |
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-24HF-OG at U.S.-average rates.
| Model | Cooling BTU/h | SEER2 | HSPF2 | 5°F kept | Est. yearly cost | |
|---|---|---|---|---|---|---|
| Senville SENA/24HF/OQ | 24,000 | 19.2–21.5 | 11.5 | 93% | $982 (+$106) | Compare |
| Pioneer YN024GMFI22RPE | 24,000 | 19–21.5 | 11.2 | 80% | $901 (+$24) | Compare |
| Hisense AOU-24U3T25U | 24,000 | 19–20 | 10.5 | 100% | $916 (+$40) | Compare |
| Pioneer YN024GLSI24RPG | 23,000 | 19–23 | 10.4 | 76% | $940 (+$64) | Compare |
| Mitsubishi Electric PUZ-AK24NLHZ2*** | 24,000 | 17–22.8 | 10.8 | 100% | $982 (+$105) | Compare |
| Gree GWH18AVEXF-D6DNA1A/O | 21,000 | 20–27.5 | 10 | 86% | $820 (−$57) | Compare |
Full specifications
| Brand | Senville |
| Outdoor model | SENA-24HF-OG |
| Certified by | Senville Air Conditioners |
| Product type | Mini-split / multi-split |
| Compressor | Variable-speed (inverter) |
| Refrigerant | R-454B |
| Cooling capacity | 24,000 BTU/h |
| Nominal size | 2 tons |
| SEER2 (certified range) | 19 – 21 |
| EER2 (best) | 13 |
| HSPF2 (best) | 13.5 |
| Heating capacity @ 47°F | 29,000 BTU/h |
| Heating capacity @ 17°F | 22,200 BTU/h |
| Heating capacity @ 5°F | 24,200 BTU/h |
| COP @ 5°F | 2.34 |
| ENERGY STAR cold-climate | Yes |
| Certified indoor pairings | 4 |
| 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-24HF-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 $876 per year ($624 heating, $252 cooling). It ranges from about $519 in Louisiana to $1,956 in Maine.
Does the Senville SENA-24HF-OG work in cold weather?
Yes. It is ENERGY STAR cold-climate certified and delivers 24,200 BTU/h at 5°F, 83% of its 47°F capacity, with a COP of 2.34 at 5°F.
What size is the Senville SENA-24HF-OG?
It is rated at 24,000 BTU/h of cooling, roughly 2 tons, and 29,000 BTU/h of heating at 47°F. Proper sizing should be confirmed with a Manual J load calculation.