10 Best Mini Split For Garage 2025 in the United States

The Senville LETO Series Mini Split is a solid choice for heating and cooling a garage, thanks to its 12,000 BTU (1 ton) capacity, which suits small to medium spaces well. With a high SEER rating of 20.8, it’s energy efficient, helping keep electricity costs lower when running. It also doubles as a heat pump capable of warming your space down to about 5°F (-15°C), which is helpful in colder climates. The unit includes a versatile 4-in-1 function—cooling, heating, dehumidifying, and fan modes—giving you year-round comfort.

A standout feature is its Alexa compatibility, allowing you to control the system by voice or app, adding convenience. Installation comes with everything needed, but it requires professional setup, and the included line set supports up to 25 feet, so consider the distance from your outdoor condenser to the indoor unit. Mini splits generally run quietly, making it unlikely to disturb your garage workspace. The 5-year warranty on parts and compressor shows confidence in durability, though labor costs for installation aren’t covered.

One downside is that it’s not Energy Star certified, which might concern those seeking the strictest energy efficiency standards. This model balances strong performance and smart features, making it a practical option for someone looking to keep their garage comfortable year-round without breaking the bank.

The COSTWAY 18000 BTU mini-split is a solid choice if you're looking to heat and cool a garage up to about 1250 square feet. Its cooling and heating power, supported by a 1.5-ton heat pump, makes it suitable for year-round comfort, whether you need warmth in winter or cooling in summer. With a SEER rating of 19, it is energy efficient, which means it can save you money on electricity over time compared to less efficient models. The inverter technology helps by running the compressor smoothly instead of turning it on and off frequently, extending the unit’s life and improving efficiency.

The unit offers several modes, including auto, cool, dry, heat, and fan, plus extra features like sleep and eco modes, so you can customize air flow and temperature to your liking. It also has a remote control for convenience and a quiet operation at 56 decibels, which is about the noise level of a normal conversation—not completely silent but generally unobtrusive.

On the maintenance side, the self-cleaning function and washable filter simplify upkeep, and the R-32 refrigerant used is better for the environment compared to older refrigerants. Installation needs to be handled by a licensed HVAC professional, which means added cost and effort upfront. Additionally, while 56 dB is fairly quiet, if your garage is used as a workspace requiring near silence, you might notice the sound. The product includes good warranty coverage (5 years on parts and 8 years on the compressor), providing peace of mind. If you want an energy-efficient mini-split that covers heating and cooling with useful features and manageable noise, this unit fits well, though professional installation and moderate noise should be expected.

The MRCOOL 12000 BTU ductless mini split is a solid choice if you need an all-in-one heating and cooling solution for a garage or similarly sized space up to about 550 square feet. Its 12,000 BTU capacity is appropriate for moderate-sized areas, and the unit offers year-round comfort with both cooling and heating capabilities. The heating performance is decent for mild winters, but keep in mind it may not be enough for very cold climates. The system runs quietly at around 43 dB, so it won’t be a distraction while you work or relax in your garage.

Energy efficiency is moderate with a 2-star rating, which is common in this price and power range, though more efficient models exist if you want to save more on electricity bills. One of the biggest advantages is the DIY-friendly design, making installation easier for those who want to avoid hiring a professional. It includes helpful features like timer mode and refrigerant leak detection, plus an air cleaning technology that keeps filters easy to maintain and helps with indoor air quality.

On the downside, the 115V voltage limits it to smaller setups and might not suit larger garages or workshops needing more power. Also, the unit’s size means you’ll need some wall space for mounting. If you want a straightforward, reasonably priced mini split system for a garage or small commercial spot, this MRCOOL unit balances performance, convenience, and comfort effectively.