Our take in 30 seconds
Best for: mixed climates with occasional hard freezesStrengths
- Cooling efficiency up to SEER2 24.5, better than 93% of models
- Variable-speed compressor: quieter, steadier temperatures and better humidity control
- Uses newer, lower-impact R-32 refrigerant
Good to know
- Efficiency depends on the indoor unit: SEER2 ranges 21–24.5, so ask which pairing you're quoted
Running-cost calculator
Pre-filled with EIA prices · edit any fieldUses the base certified SEER2 (21) and HSPF2 (9.5). 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 Gree GWH18AUDXF-D6DNA1A/O at the three ENERGY STAR test temperatures (cooling capacity is 21,000 BTU/h for reference).
Retention at 17°F: 86% · at 5°F: 75%. Learn how to use these numbers in our cold-climate guide.
Estimated running cost in every state
Same unit, very different bills: from about $457 a year in Louisiana to $1,980 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¢ | $199 | $257 | $457 |
| Florida | 14.99¢ | $149 | $360 | $509 |
| Mississippi | 14.43¢ | $287 | $260 | $547 |
| Arizona | 15.05¢ | $233 | $331 | $564 |
| Nevada | 12.72¢ | $337 | $229 | $566 |
| Tennessee | 13.42¢ | $415 | $174 | $590 |
| Washington | 14.63¢ | $550 | $51 | $601 |
| North Carolina | 14.95¢ | $430 | $194 | $624 |
| Arkansas | 14.37¢ | $413 | $216 | $628 |
| Oregon | 15.92¢ | $563 | $72 | $635 |
| Texas | 15.91¢ | $317 | $318 | $635 |
| South Carolina | 15.76¢ | $383 | $252 | $635 |
| Kentucky | 13.80¢ | $488 | $152 | $640 |
| Georgia | 15.90¢ | $387 | $254 | $641 |
| Alabama | 16.33¢ | $397 | $261 | $658 |
| Utah | 13.31¢ | $559 | $120 | $679 |
| Oklahoma | 14.82¢ | $459 | $222 | $681 |
| New Mexico | 16.51¢ | $547 | $165 | $713 |
| Idaho | 13.37¢ | $621 | $94 | $714 |
| Nebraska | 13.54¢ | $629 | $122 | $750 |
| Missouri | 16.02¢ | $602 | $176 | $778 |
| Virginia | 17.64¢ | $585 | $194 | $779 |
| West Virginia | 16.31¢ | $649 | $130 | $779 |
| Kansas | 15.47¢ | $616 | $170 | $786 |
| Wyoming | 14.43¢ | $797 | $72 | $870 |
| Colorado | 17.17¢ | $759 | $120 | $879 |
| California | 29.75¢ | $592 | $298 | $889 |
| Delaware | 18.70¢ | $703 | $187 | $890 |
| Indiana | 17.02¢ | $752 | $145 | $897 |
| North Dakota | 13.31¢ | $853 | $60 | $913 |
| Montana | 15.57¢ | $860 | $70 | $931 |
| South Dakota | 15.15¢ | $837 | $98 | $936 |
| Iowa | 17.06¢ | $867 | $128 | $995 |
| Ohio | 19.38¢ | $857 | $155 | $1,012 |
| Maryland | 21.40¢ | $804 | $214 | $1,018 |
| Illinois | 19.32¢ | $897 | $155 | $1,051 |
| Minnesota | 17.20¢ | $1,027 | $95 | $1,121 |
| Pennsylvania | 21.77¢ | $962 | $174 | $1,137 |
| Wisconsin | 19.41¢ | $1,073 | $116 | $1,189 |
| New Jersey | 24.61¢ | $979 | $221 | $1,201 |
| District of Columbia | 25.98¢ | $919 | $286 | $1,205 |
| Hawaii | 47.18¢ | $52 | $1,227 | $1,279 |
| Connecticut | 24.51¢ | $1,192 | $159 | $1,351 |
| Michigan | 22.99¢ | $1,220 | $138 | $1,358 |
| Vermont | 23.84¢ | $1,370 | $107 | $1,477 |
| Rhode Island | 28.18¢ | $1,370 | $169 | $1,540 |
| New York | 28.65¢ | $1,393 | $186 | $1,580 |
| New Hampshire | 27.64¢ | $1,527 | $138 | $1,666 |
| Massachusetts | 30.48¢ | $1,550 | $183 | $1,733 |
| Maine | 32.11¢ | $1,845 | $128 | $1,974 |
| Alaska | 29.41¢ | $1,950 | $29 | $1,980 |
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 Gree GWH18AUDXF-D6DNA1A/O at U.S.-average rates.
| Model | Cooling BTU/h | SEER2 | HSPF2 | 5°F kept | Est. yearly cost | |
|---|---|---|---|---|---|---|
| Bryant 37MARAQ18AA3 | 18,000 | 20–23.9 | 13.5 | 71% | $610 (−$232) | Compare |
| Senville SENA-24HF-OG | 24,000 | 19–21 | 13.5 | 83% | $876 (+$34) | Compare |
| Bryant 37MAHAQ18AA3 | 18,000 | 18–21.5 | 12.4 | 90% | $668 (−$174) | Compare |
| Senville SENA-18HF-OG | 18,000 | 18–21.4 | 12.3 | 90% | $672 (−$170) | Compare |
| Senville SENA/24HF/OQ | 24,000 | 19.2–21.5 | 11.5 | 93% | $982 (+$140) | Compare |
| Fujitsu AOUH18KUAS1 | 18,000 | 18.6–26.3 | 11.4 | 82% | $744 (−$98) | Compare |
Full specifications
| Brand | Gree |
| Outdoor model | GWH18AUDXF-D6DNA1A/O |
| Certified by | Gree Electric Appliances Inc. of Zhuhai |
| Product type | Mini-split / multi-split |
| Compressor | Variable-speed (inverter) |
| Refrigerant | R-32 |
| Cooling capacity | 21,000 BTU/h |
| Nominal size | 2 tons |
| SEER2 (certified range) | 21 – 24.5 |
| EER2 (best) | 14 |
| HSPF2 (best) | 9.5 |
| Heating capacity @ 47°F | 21,000 BTU/h |
| Heating capacity @ 17°F | 18,000 BTU/h |
| Heating capacity @ 5°F | 15,800 BTU/h |
| COP @ 5°F | 1.9 |
| ENERGY STAR cold-climate | Yes |
| Certified indoor pairings | 7 |
| 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 Gree GWH18AUDXF-D6DNA1A/O 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 $842 per year ($642 heating, $200 cooling). It ranges from about $457 in Louisiana to $1,980 in Alaska.
Does the Gree GWH18AUDXF-D6DNA1A/O work in cold weather?
Yes. It is ENERGY STAR cold-climate certified and delivers 15,800 BTU/h at 5°F, 75% of its 47°F capacity, with a COP of 1.9 at 5°F.
What size is the Gree GWH18AUDXF-D6DNA1A/O?
It is rated at 21,000 BTU/h of cooling, roughly 2 tons, and 21,000 BTU/h of heating at 47°F. Proper sizing should be confirmed with a Manual J load calculation.