Why it matters
The LITHZEN 12,000 BTU 115V Mini-Split is rated at 12,000 BTU of cooling. 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 17 SEER2 ranks 23 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. 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 28 dB at its quietest setting.
Installation needs the lines vacuumed and the valves opened after the line set is connected; most makers tie the warranty to a licensed installer. It uses R-32 refrigerant, one of the lower-impact A2L refrigerants new systems moved to in 2025.
The listing gives dimensions of 8 inD x 12 inW x 30 inH, a shipping or unit weight of 17.5 pounds and a 1,230 W power draw.
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
- 17 SEER2
- Quiet indoor head (28 dB)
Cons
- Low-temperature heating not stated
- Heating capacity not stated on the listing
- 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) | 7 working modes and 5 fan speeds, Fast Cooling, Heating & Cooling Function, R32 refrigerant | Retailer |
| Dimensions (seller) | 8"D x 12"W x 30"H | Retailer |
| SEER (maker) | 17 | Retailer |
| Voltage | 115 V | Retailer |
| Noise (seller) | 28 db | Retailer |
| Refrigerant | R-32 | Retailer |
| Wattage | 1230 W | Retailer |
| Room size (maker) | 750 sq ft | Retailer |
| Model number | 11273-CYFP | Retailer |
| Product weight | 17.5 lb | Retailer |
| Control | App, Remote, Touch | Retailer |
| SEER2 (maker) | 17 | Retailer |
Alternatives worth comparing
More ductless mini-splits we cover
Final verdict
A sensible 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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