Why it matters
The TOSOT 18,000 BTU 230V Mini-Split is rated at 18,000 BTU of cooling and 19,100 BTU of heating. On the ENERGY STAR room sizing chart that suits about 700 to 1,000 sq ft of average room. It needs a 230V (208/240V) circuit, which usually means an electrician if one isn't already at the spot.
Its 20 SEER2 ranks 6 of 16 among the mini-splits within about 12% of its capacity that we cover; the most efficient is the DELLA Optima 18,000 BTU 230V at 23. The listing doesn't give a low-temperature heating limit, so treat it as a mild-climate heat pump until the maker confirms one. Indoor noise is listed at 24 dB at its quietest setting.
Expect a professional install: the copper lines are connected, pressure-checked and vacuumed before the refrigerant is released. The kit includes a 16 ft. copper line set. It uses R-410A refrigerant, the older refrigerant new systems stopped using in 2025; remaining stock can still be installed. Warranty, per the listing: 5-year warranty.
The listing gives dimensions of 16.9 inD x 23.3 inW x 37.3 inH, a 2,400 W power draw and mini-split air conditioner in the box.
Who it's for, and who should skip it
Good fit if
- Rooms of about 700-1,000 sq ft
- Large rooms and garages
Look elsewhere if
- Primary heat in cold climates
- Spaces much larger than 1,000 sq ft
- Owners who want to avoid a licensed install
Pros and cons
Pros
- 20 SEER2
- 19,100 BTU heating stated
- 16 ft. copper line set included
- Quiet indoor head (24 dB)
Cons
- Low-temperature heating not stated
- Needs a 230V circuit
- Professional install recommended
- Older R-410A refrigerant
Limitations to weigh
- Capacity and efficiency are the maker's ratings; real output depends on the install, the line length and the weather.
- Heat pumps lose heating capacity as it gets colder; size for your climate with the BTU calculator.
- The federal 25C tax credit ended for systems installed after 2025; check your utility for current rebates.
Specifications
Every figure below comes from the source shown in brackets. Where the maker doesn't state something, we say so instead of estimating.
| Capacity | 1.5 tons | Retailer |
|---|---|---|
| Cooling capacity (maker) | 18000 BTU | Retailer |
| Features (seller) | Google Assistant,Wifi, Heating & Cooling Function, Inverter Compressor, Remote Controlled | Retailer |
| Dimensions (seller) | 16.9"D x 23.3"W x 37.3"H | Retailer |
| SEER (maker) | 20 | Retailer |
| Voltage | 230 V | Retailer |
| Noise (seller) | 24 db | Retailer |
| Refrigerant | R 410A | Retailer |
| Wattage | 2400 W | Retailer |
| Model number | GWH18AFDXE-D3DNA2B/I | Retailer |
| Warranty | 5-year warranty | Retailer |
| Control | Voice | Retailer |
| Heating capacity (maker) | 19,100 BTU | Retailer |
| SEER2 (maker) | 20 | Retailer |
| Line set included | 16 ft. copper line set | Retailer |
Alternatives worth comparing
More ductless mini-splits we cover
- DELLA Econo 23,000 BTU 230V
- Cooper & Hunter MIA 18,000 BTU 230V
- ROVSUN 24,000 BTU 230V Mini-Split
- Senville LETO 24,000 BTU 230V
All ductless mini-splits, compared in one table · Every TOSOT product we cover
Final verdict
A straightforward choice for a 700-1,000 sq ft room. Check that 18,000 BTU fits your room with the BTU calculator before you buy.
Where to buy
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