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 10.2) beats 78% of models
- Cooling efficiency up to SEER2 23.6, better than 90% 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 19.5–23.6, 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 (10.2). 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 Goodman MSH123E23MCAA 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 $269 a year in Louisiana to $1,102 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¢ | $110 | $158 | $269 |
| Florida | 14.99¢ | $83 | $221 | $304 |
| Mississippi | 14.43¢ | $159 | $160 | $319 |
| Nevada | 12.72¢ | $187 | $141 | $328 |
| Arizona | 15.05¢ | $129 | $204 | $333 |
| Washington | 14.63¢ | $305 | $32 | $336 |
| Tennessee | 13.42¢ | $230 | $107 | $338 |
| Oregon | 15.92¢ | $312 | $44 | $356 |
| North Carolina | 14.95¢ | $238 | $120 | $358 |
| Arkansas | 14.37¢ | $229 | $133 | $362 |
| Kentucky | 13.80¢ | $271 | $93 | $364 |
| South Carolina | 15.76¢ | $212 | $155 | $368 |
| Georgia | 15.90¢ | $214 | $157 | $371 |
| Texas | 15.91¢ | $175 | $196 | $371 |
| Alabama | 16.33¢ | $220 | $161 | $381 |
| Utah | 13.31¢ | $310 | $74 | $384 |
| Oklahoma | 14.82¢ | $254 | $137 | $391 |
| Idaho | 13.37¢ | $344 | $58 | $402 |
| New Mexico | 16.51¢ | $303 | $102 | $405 |
| Nebraska | 13.54¢ | $348 | $75 | $423 |
| West Virginia | 16.31¢ | $360 | $80 | $440 |
| Missouri | 16.02¢ | $334 | $108 | $442 |
| Virginia | 17.64¢ | $324 | $119 | $444 |
| Kansas | 15.47¢ | $341 | $105 | $446 |
| Wyoming | 14.43¢ | $442 | $44 | $486 |
| Colorado | 17.17¢ | $421 | $74 | $495 |
| Delaware | 18.70¢ | $390 | $115 | $505 |
| Indiana | 17.02¢ | $417 | $89 | $506 |
| North Dakota | 13.31¢ | $473 | $37 | $510 |
| California | 29.75¢ | $328 | $183 | $511 |
| Montana | 15.57¢ | $477 | $43 | $520 |
| South Dakota | 15.15¢ | $464 | $61 | $525 |
| Iowa | 17.06¢ | $481 | $79 | $560 |
| Ohio | 19.38¢ | $475 | $95 | $570 |
| Maryland | 21.40¢ | $446 | $132 | $578 |
| Illinois | 19.32¢ | $497 | $95 | $592 |
| Minnesota | 17.20¢ | $569 | $58 | $627 |
| Pennsylvania | 21.77¢ | $534 | $107 | $641 |
| Wisconsin | 19.41¢ | $595 | $72 | $666 |
| New Jersey | 24.61¢ | $543 | $136 | $679 |
| District of Columbia | 25.98¢ | $509 | $176 | $685 |
| Connecticut | 24.51¢ | $661 | $98 | $759 |
| Michigan | 22.99¢ | $676 | $85 | $761 |
| Hawaii | 47.18¢ | $29 | $755 | $784 |
| Vermont | 23.84¢ | $760 | $66 | $826 |
| Rhode Island | 28.18¢ | $760 | $104 | $864 |
| New York | 28.65¢ | $772 | $115 | $887 |
| New Hampshire | 27.64¢ | $847 | $85 | $932 |
| Massachusetts | 30.48¢ | $859 | $113 | $972 |
| Alaska | 29.41¢ | $1,081 | $18 | $1,099 |
| Maine | 32.11¢ | $1,023 | $79 | $1,102 |
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 Goodman MSH123E23MCAA 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 (−$78) | Compare |
| Bryant 37MAHAQ12AA3 | 12,000 | 20–25.5 | 11.6 | 96% | $433 (−$46) | Compare |
| Senville SENA-12HF-OG | 12,000 | 20–25.4 | 11.6 | 94% | $433 (−$46) | Compare |
| Mitsubishi Electric PUZ-A12NKA7*** | 12,000 | 21.3–26.9 | 10.9 | 38% | $646 (+$167) | Compare |
| Payne 37MARAQ12AA3 | 12,000 | 19–25.5 | 11 | 74% | $443 (−$36) | Compare |
| Bryant 38MARBQ12AA3 | 12,000 | 19.5–25.5 | 10.7 | 97% | $462 (−$17) | Compare |
Full specifications
| Brand | Goodman |
| Outdoor model | MSH123E23MCAA |
| Certified by | Daikin Comfort Technologies Manufacturing, L.P. |
| 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 – 23.6 |
| EER2 (best) | 13.5 |
| HSPF2 (best) | 10.2 |
| 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 | 1.96 |
| ENERGY STAR cold-climate | Yes |
| Certified indoor pairings | 3 |
| 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 Goodman MSH123E23MCAA 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 $479 per year ($356 heating, $123 cooling). It ranges from about $269 in Louisiana to $1,102 in Maine.
Does the Goodman MSH123E23MCAA 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 1.96 at 5°F.
What size is the Goodman MSH123E23MCAA?
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.