COSTWAY 12000 BTU Mini Split Review: 115V AC and Heater
COSTWAY's budget 1 ton mini split runs on 115V, covers up to 750 sq ft, adds 12300 BTU of heat and self-clean, and carries 5 years on parts and 8 on the compressor.
By Daniel Brooks
Updated October 22, 2026
The COSTWAY 12000 BTU mini split is one of the most affordable ways to put a full 1 ton heat pump on the wall of a single room. It runs on 115 volts, covers up to 750 square feet by COSTWAY’s rating, and pairs 12000 BTU of cooling with 12300 BTU of heating. It also has one of the largest rating counts among the single-zone mini-split air conditioners we track, with a 4.4 out of 5 average from 1,678 ratings shared across the COSTWAY series.
Our Verdict
For a bedroom, office, garage or small apartment, the COSTWAY 12000 BTU delivers the core mini split benefits at a budget price: an inverter compressor, quiet operation, heat pump warmth and a remote with every mode you need. Its warranty is a standout at this price, with 5 years on parts and 8 years on the compressor.
What you give up is smart control. There is no Wi-Fi or voice control in this version, and the heat pump has no published cold-climate rating. Like nearly every system here, it also needs a licensed HVAC installer.
COSTWAY 12000 BTU Mini Split Air Conditioner
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Key Specifications
| Feature | Specification |
|---|---|
| Brand | COSTWAY |
| Model | 10153-CYJV |
| Type | Single-zone ductless mini split heat pump |
| Cooling Capacity | 12000 BTU (1 ton) |
| Heating Capacity | 12300 BTU |
| Room Size | Up to 750 sq ft |
| Power | 115 volts |
| Max Wattage (listed) | 1970 watts |
| Efficiency | 20 SEER |
| Noise Level | 23 dB (listed) |
| Refrigerant | R-32 |
| Modes | Auto, cool, dry, heat, fan |
| Fan Speeds | 4 (low, medium, high, auto) |
| Timer | 0.5 to 24 hours |
| Warranty | 5 years parts, 8 years compressor |
Cooling Capacity and Room Size
COSTWAY rates this unit for up to 750 square feet. On the ENERGY STAR chart below, 12,000 BTU sits in the 450 to 550 square foot band, so the 750 figure assumes a well-insulated, shaded room. For a typical bedroom, office or studio apartment, 1 ton of inverter capacity is plenty and leaves room to recover quickly on hot afternoons.
ENERGY STAR publishes this general guide for matching cooling capacity to floor area:
| Room Size (sq ft) | Cooling Capacity (BTU/hr) |
|---|---|
| 100 to 150 | 5,000 |
| 150 to 250 | 6,000 |
| 250 to 300 | 7,000 |
| 300 to 350 | 8,000 |
| 350 to 400 | 9,000 |
| 400 to 450 | 10,000 |
| 450 to 550 | 12,000 |
| 550 to 700 | 14,000 |
| 700 to 1,000 | 18,000 |
| 1,000 to 1,200 | 21,000 |
| 1,200 to 1,400 | 23,000 |
| 1,400 to 1,500 | 24,000 |
| 1,500 to 2,000 | 30,000 |
| 2,000 to 2,500 | 34,000 |
Adjust for your room: reduce capacity by 10 percent for a heavily shaded room, increase it by 10 percent for a very sunny room, add 600 BTU for each regular occupant beyond two, and add 4,000 BTU if the unit cools a kitchen. Source: ENERGY STAR.
The inverter compressor changes speed with demand instead of switching on and off. That keeps the temperature steadier and the noise lower, and it is the main reason a mini split feels so different from a window unit of the same rating.
Heating Performance
The heat pump delivers 12300 BTU of heating, a little more than the cooling rating, which makes this a genuine two-season system rather than a cooling unit with a token heater. The outdoor unit has an auto-defrost function that clears frost from the coil in cold weather to keep heat output steady and protect the equipment.
COSTWAY does not publish a low-temperature heating limit for this model. For mild and moderate winters it will carry a room well, but in a cold climate plan on a backup heat source for the coldest days.
Efficiency
The listing rates the system at 20 SEER, a strong figure for a budget mini split and much higher than any window or portable unit. COSTWAY lists a maximum draw of 1970 watts, but an inverter spends most of its time well below that once the room reaches the set point.
Modes and Controls
The remote covers five working modes: auto, cool, dry, heat and fan. You also get four fan speeds, sleep mode, ECO mode, an iFEEL function that reads the temperature at the remote, and a turbo function for fast cooling or heating. The timer runs from 0.5 to 24 hours, and the remote’s display switches off after 10 seconds without input so it does not light up a dark bedroom.
Noise
COSTWAY lists 23 dB at low speed, which is close to a whisper. Expect the indoor unit to be louder on turbo or high fan, but at the low and medium settings most people use overnight, it is quiet enough for a bedroom.
Self-Cleaning and Maintenance
A high-temperature self-cleaning cycle runs at 134.6F to dry and clean the inside of the indoor unit, which helps prevent musty smells. The washable filter slides out for rinsing. Clean it every couple of weeks in heavy use, and keep the outdoor unit clear of leaves and debris.
Installation
COSTWAY states that the system should be installed only by a licensed HVAC installer. The outdoor unit is pre-charged, but the installer still needs to mount the units, connect and vacuum the line set, and open the valves. Before ordering, confirm you have a dedicated 115 volt circuit near the condenser location and a clear path through the wall for the lines and drain.
Warranty
The warranty is one of the best at this price: 5 years on parts and 8 years on the compressor. Keep your installer’s paperwork, since a licensed installation is part of the conditions.
How It Compares
Against other budget 12000 BTU systems, the COSTWAY’s strengths are its long compressor warranty, 23 dB listed sound level and large ratings base. Rivals at a similar price often add Wi-Fi or Alexa control, so if app control matters, look at a smart model. If you just want a reliable heat pump that you control with a remote, this one is hard to beat for the money.
Planning the Install
A mini split install goes more smoothly when the decisions are made before the technician arrives. Pick an indoor location high on an outside wall, with at least a few inches of clearance above the unit and nothing blocking the airflow in front of it. Choose an outdoor spot within reach of the line set that is level, drains well and stays clear of dryer vents and heavy foliage. A short, direct line run is best for efficiency and keeps the refrigerant charge within the factory amount.
Ask your installer to quote the electrical work at the same time. Many installs need a new dedicated circuit and an outdoor disconnect, and that is often the largest variable in the total cost.
Living With It
Day to day, most owners run a mini split on auto or cool with the fan on auto and leave it alone. The inverter is most efficient when it holds a steady temperature, so avoid large setbacks and let the system coast at low speed. In humid weather, dry mode removes moisture with less cooling, which helps on mild, sticky days in spring and fall.
Pros and Cons
| Pros | Cons |
|---|---|
| Budget price for a 1 ton heat pump | No Wi-Fi or voice control |
| 12300 BTU of heat | Professional installation required |
| 5 year parts, 8 year compressor warranty | No published low-temperature limit |
| Quiet 23 dB listing | Ratings shared across the series |
| Runs on 115 volts | 750 sq ft rating is optimistic |
Who Should Buy It
| Who Should Buy It? | Who Should Look Elsewhere? |
|---|---|
| Bedrooms, offices and garages | Smart home users |
| Budget buyers who want a long warranty | Very cold climates |
| Homes without spare panel capacity | DIY installers |
| Light sleepers | Large open areas |
For more options, see our picks for the best budget mini-split air conditioners and the best 12,000 BTU mini-split air conditioners.
Final Verdict
The COSTWAY 12000 BTU mini split is a strong value pick for one room. It runs on 115 volts, heats and cools efficiently, stays quiet, and comes with a warranty that rivals premium brands. You can check the current price and details for the COSTWAY 12000 BTU Mini Split Air Conditioner & Heater.
Frequently Asked Questions
Does the COSTWAY 12000 BTU mini split have Wi-Fi?
No. This version uses the included remote control.
What size room does it cover?
COSTWAY rates it for up to 750 square feet.
How much heat does it produce?
It lists 12300 BTU of heating capacity.
What warranty does it carry?
COSTWAY lists 5 years on parts and 8 years on the compressor.
About the author
Daniel Brooks is a home cooling editor at WikiCooling, covering window, portable, through-the-wall and mini-split air conditioners, fans, and dehumidifiers. He researches cooling capacity, energy efficiency, noise levels, installation requirements, and buyer feedback to help homeowners choose the right unit for their room size, climate, and budget.