Why it matters
The COSTWAY 18,000 BTU 230V Mini-Split (FP10154US-WH+) is rated at 18,000 BTU of cooling and 18,000 BTU of heating. On the ENERGY STAR room sizing chart that suits about 700 to 1,000 sq ft of average room; the maker says up to 1,250 sq ft. It needs a 230V (208/240V) circuit, which usually means an electrician if one isn't already at the spot.
Its 19 SEER ranks 2 of 4 among the mini-splits within about 12% of its capacity that we cover; the most efficient is the Senville AURA 18,000 BTU at 21.5. 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 23 dB at its quietest setting.
Like most split systems it ships pre-charged for a set line length; connecting it means flaring, pulling a vacuum and opening the valves, a licensed technician's job in most places. It uses R-32 refrigerant, one of the lower-impact A2L refrigerants new systems moved to in 2025.
The listing gives dimensions of 8.5 inD x 37 inW x 12 inH, a shipping or unit weight of 68 pounds and a 1,200 W power draw.
Who it's for, and who should skip it
Good fit if
- Rooms of about 700-1,000 sq ft
- Large rooms and garages
- Lower running costs than most same-size systems
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
- 19 SEER
- 18,000 BTU heating stated
- Quiet indoor head (23 dB)
Cons
- Low-temperature heating not stated
- Needs a 230V circuit
- Professional install recommended
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 |
| Dimensions (seller) | 8.5"D x 37"W x 12"H | Retailer |
| SEER (maker) | 19 | Retailer |
| Voltage | 208 V AC | Retailer |
| Noise (seller) | 23 db | Retailer |
| Features (seller) | Energy Efficient, Auto Clean, Dehumidifier, Dust Filter, Fast Cooling, Heating And Cooling Function, Inverter Compressor, 4 Way Swing, ECO mode, iFEEL, and turbo function | Retailer |
| Refrigerant | R-32 | Retailer |
| Product weight | 68 lb | Retailer |
| Control | Remote | Retailer |
| Model number | FP10154US-WH+ | Retailer |
| Wattage | 1200 W | Retailer |
| Room size (maker) | 1250 sq ft | Retailer |
| Heating capacity (maker) | 18000 BTU | Retailer |
Alternatives worth comparing
More ductless mini-splits we cover
- YITAHOME 18,000 BTU 230V Mini-Split
- DELLA Serena 12,000 BTU 230V
- COSTWAY 18,000 BTU 230V Mini-Split
- ActiveTrail 23,000 BTU 230V Mini-Split
All ductless mini-splits, compared in one table · Every COSTWAY product we cover
Final verdict
A solid 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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