Why it matters
The Midea 12,000 BTU 115V Window Heat Pump 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 550 sq ft. It runs on 115V, so it needs a dedicated household circuit rather than a 240V line.
Its 13.3 SEER ranks 2 of 2 among the room heat pumps within about 12% of its capacity that we cover; the most efficient is the Senville 12,000 BTU 230V PTAC Heat Pump at 14.5. 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 58 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-410A refrigerant, the older refrigerant new systems stopped using in 2025; remaining stock can still be installed. Warranty, per the listing: 1 year limited.
The listing gives dimensions of 22.17 inD x 19.41 inW x 13.9 inH, a shipping or unit weight of 58 pounds, a 115 W power draw and 12000 btu window air conditioner w/ heat, remote control, installation kit/user manual, batteries in the box.
Who it's for, and who should skip it
Good fit if
- Rooms of about 450-550 sq ft
- Rooms where a split won't fit
- Lower running costs than most same-size systems
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
- 13.3 SEER
Cons
- Low-temperature heating not stated
- Heating capacity not stated on the listing
- 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 tons | Retailer |
|---|---|---|
| Cooling capacity (maker) | 12000 BTU | Retailer |
| Features (seller) | Dehumidifier, Heating And Cooling Function, Inverter Compressor, Remote Controlled, Wireless control | Retailer |
| Dimensions (seller) | 22.17"D x 19.41"W x 13.9"H | Retailer |
| SEER (maker) | 13.3 | Retailer |
| Voltage | 115 V | Retailer |
| Noise (seller) | 58 db | Retailer |
| Refrigerant | R 410A | Retailer |
| Wattage | 115 W | Retailer |
| Control | App, Remote, Voice | Retailer |
| Model number | MAW12HV1CWT | Retailer |
| Warranty | 1 year limited | Retailer |
| Product weight | 58 lb | Retailer |
| Room size (maker) | 550 sq ft | Retailer |
Alternatives worth comparing
More window and ptac heat pumps 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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