Why it matters
The COSTWAY 12,000 BTU 115V Mini-Split, 22 SEER2 is rated at 12,000 BTU of cooling and 12,300 BTU of heating. On the ENERGY STAR room sizing chart that suits about 450 to 550 sq ft of average room; the maker says up to 750 sq ft. It runs on 115V, so it needs a dedicated household circuit rather than a 240V line.
Its 22 SEER2 ranks 4 of 26 among the mini-splits within about 12% of its capacity that we cover; the most efficient is the DELLA Optima 12,000 BTU 230V at 24. Heating efficiency is 9 HSPF2. 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 30 inD x 8 inW x 11.5 inH, a shipping or unit weight of 23.6 pounds, a 1,040 W power draw and mini split in the box.
Who it's for, and who should skip it
Good fit if
- Rooms of about 450-550 sq ft
- Homes without a spare 240V circuit
Look elsewhere if
- Primary heat in cold climates
- Spaces much larger than 550 sq ft
- Owners who want to avoid a licensed install
Pros and cons
Pros
- 22 SEER2
- 12,300 BTU heating stated
- Quiet indoor head (23 dB)
Cons
- Low-temperature heating not stated
- 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 tons | Retailer |
|---|---|---|
| Cooling capacity (maker) | 12000 BTU | Retailer |
| Features (seller) | 4 Way Swing, Fast Cooling, Heating & Cooling Function | Retailer |
| Dimensions (seller) | 30"D x 8"W x 11.5"H | Retailer |
| SEER (maker) | 22 | Retailer |
| Voltage | 115 V AC | Retailer |
| Noise (seller) | 23 db | Retailer |
| Refrigerant | R-32 | Retailer |
| Wattage | 1040 W | Retailer |
| Control | App, Remote, Voice | Retailer |
| Heating capacity (maker) | 12300 BTU | Retailer |
| Model number | 10901-CYFP | Retailer |
| Product weight | 23.6 lb | Retailer |
| Room size (maker) | 750 sq ft | Retailer |
| SEER2 (maker) | 22 | Retailer |
| HSPF2 (maker) | 9 | Retailer |
Alternatives worth comparing
More ductless mini-splits we cover
- DELLA Motto 9,100 BTU 115V
- TOSOT 9,000 BTU 115V Mini-Split
- TOSOT 12,000 BTU 115V Mini-Split
- Senville LETO 9,000 BTU 115V
All ductless mini-splits, compared in one table · Every COSTWAY product we cover
Final verdict
A solid choice for a 450-550 sq ft room. Check that 12,000 BTU fits your room with the BTU calculator before you buy.
Where to buy
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