Our take in 30 seconds
Best for: cold and very cold climatesStrengths
- Keeps 88% of its heat at 5°F, so backup heat rarely runs
- 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 GS18HP230V1CLO at the three ENERGY STAR test temperatures (cooling capacity is 18,000 BTU/h for reference).
Retention at 17°F: 100% · at 5°F: 88%. Learn how to use these numbers in our cold-climate guide.
Estimated running cost in every state
Same unit, very different bills: from about $391 a year in Louisiana to $1,697 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¢ | $171 | $221 | $391 |
| Florida | 14.99¢ | $128 | $308 | $436 |
| Mississippi | 14.43¢ | $246 | $223 | $469 |
| Arizona | 15.05¢ | $200 | $284 | $483 |
| Nevada | 12.72¢ | $289 | $196 | $485 |
| Tennessee | 13.42¢ | $356 | $150 | $506 |
| Washington | 14.63¢ | $471 | $44 | $515 |
| North Carolina | 14.95¢ | $368 | $167 | $535 |
| Arkansas | 14.37¢ | $354 | $185 | $539 |
| Oregon | 15.92¢ | $483 | $61 | $544 |
| Texas | 15.91¢ | $271 | $273 | $544 |
| South Carolina | 15.76¢ | $328 | $216 | $545 |
| Kentucky | 13.80¢ | $418 | $130 | $548 |
| Georgia | 15.90¢ | $331 | $218 | $549 |
| Alabama | 16.33¢ | $340 | $224 | $564 |
| Utah | 13.31¢ | $479 | $103 | $582 |
| Oklahoma | 14.82¢ | $393 | $191 | $584 |
| New Mexico | 16.51¢ | $469 | $142 | $611 |
| Idaho | 13.37¢ | $532 | $80 | $612 |
| Nebraska | 13.54¢ | $539 | $104 | $643 |
| Missouri | 16.02¢ | $516 | $151 | $667 |
| Virginia | 17.64¢ | $501 | $166 | $668 |
| West Virginia | 16.31¢ | $556 | $112 | $668 |
| Kansas | 15.47¢ | $528 | $146 | $673 |
| Wyoming | 14.43¢ | $684 | $62 | $745 |
| Colorado | 17.17¢ | $651 | $103 | $754 |
| California | 29.75¢ | $507 | $255 | $762 |
| Delaware | 18.70¢ | $602 | $160 | $763 |
| Indiana | 17.02¢ | $645 | $124 | $769 |
| North Dakota | 13.31¢ | $731 | $51 | $783 |
| Montana | 15.57¢ | $738 | $60 | $798 |
| South Dakota | 15.15¢ | $718 | $84 | $802 |
| Iowa | 17.06¢ | $743 | $110 | $853 |
| Ohio | 19.38¢ | $734 | $133 | $867 |
| Maryland | 21.40¢ | $689 | $183 | $873 |
| Illinois | 19.32¢ | $769 | $132 | $901 |
| Minnesota | 17.20¢ | $880 | $81 | $961 |
| Pennsylvania | 21.77¢ | $825 | $149 | $974 |
| Wisconsin | 19.41¢ | $919 | $100 | $1,019 |
| New Jersey | 24.61¢ | $839 | $190 | $1,029 |
| District of Columbia | 25.98¢ | $788 | $245 | $1,033 |
| Hawaii | 47.18¢ | $45 | $1,051 | $1,096 |
| Connecticut | 24.51¢ | $1,022 | $137 | $1,158 |
| Michigan | 22.99¢ | $1,045 | $118 | $1,164 |
| Vermont | 23.84¢ | $1,174 | $92 | $1,266 |
| Rhode Island | 28.18¢ | $1,175 | $145 | $1,320 |
| New York | 28.65¢ | $1,194 | $160 | $1,354 |
| New Hampshire | 27.64¢ | $1,309 | $118 | $1,428 |
| Massachusetts | 30.48¢ | $1,328 | $157 | $1,485 |
| Maine | 32.11¢ | $1,582 | $110 | $1,692 |
| Alaska | 29.41¢ | $1,672 | $25 | $1,697 |
Same equipment sold under other brands
These listings share the same certifying manufacturer (Gree Electric Appliances Inc. of Zhuhai) and identical certified capacities and efficiency ratings, so they are almost certainly the same hardware with a different badge. If you get quotes for any of them, you are comparing installation price and warranty, not equipment. How rebadging works.
- Gree GS18HP230V1PUO
- Gree GWH18AGDXF-D6DNA4B/O
- Kinghome KW18XQ25S1DO
- TOSOT TWH18PD32AO
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 GS18HP230V1CLO 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 (−$112) | Compare |
| Bryant 37MAHAQ18AA3 | 18,000 | 18–21.5 | 12.4 | 90% | $668 (−$53) | Compare |
| Senville SENA-18HF-OG | 18,000 | 18–21.4 | 12.3 | 90% | $672 (−$50) | Compare |
| Fujitsu AOUH18KUAS1 | 18,000 | 18.6–26.3 | 11.4 | 82% | $744 (+$22) | Compare |
| Fujitsu AOUH18LUAS1 | 18,000 | 18.6–23.5 | 11.2 | 95% | $660 (−$61) | Compare |
| Senville SENA/18HF/OQ | 18,000 | 18–21.5 | 11.3 | 95% | $688 (−$33) | Compare |
Full specifications
| Brand | Gree |
| Outdoor model | GS18HP230V1CLO |
| Certified by | Gree Electric Appliances Inc. of Zhuhai |
| Product type | Mini-split / multi-split |
| Compressor | Variable-speed (inverter) |
| Refrigerant | R-32 |
| Cooling capacity | 18,000 BTU/h |
| Nominal size | 1.5 tons |
| SEER2 (certified range) | 21 – 24.5 |
| EER2 (best) | 14 |
| HSPF2 (best) | 9.5 |
| Heating capacity @ 47°F | 18,000 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 | 5 |
| Latest certification | 2026-10 |
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 GS18HP230V1CLO 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 $722 per year ($551 heating, $171 cooling). It ranges from about $391 in Louisiana to $1,697 in Alaska.
Does the Gree GS18HP230V1CLO work in cold weather?
Yes. It is ENERGY STAR cold-climate certified and delivers 15,800 BTU/h at 5°F, 88% of its 47°F capacity, with a COP of 1.9 at 5°F.
What size is the Gree GS18HP230V1CLO?
It is rated at 18,000 BTU/h of cooling, roughly 1.5 tons, and 18,000 BTU/h of heating at 47°F. Proper sizing should be confirmed with a Manual J load calculation.
Is the Gree GS18HP230V1CLO the same as the Gree GS18HP230V1PUO?
Very likely. Both are certified by Gree Electric Appliances Inc. of Zhuhai with identical capacities and efficiency ratings in the ENERGY STAR database, which indicates the same equipment sold under different brands.