10 Best Mini Split Air Conditioners 2025 in the United States

The COSTWAY 23000 BTU Mini Split Air Conditioner is a solid choice if you need to cool or heat a large space up to about 1500 square feet. Its powerful 23000 BTU capacity and 17 SEER rating mean it delivers efficient performance, which helps keep energy bills reasonable while still providing strong cooling and heating, even in extreme temperatures (up to 122℉ for cooling and as low as 5℉ for heating). It uses R32 refrigerant, which is better for the environment compared to older types. You get one zone for a focused climate control area, which works well in a single large room or open-plan living space. The noise level is relatively low at 37 decibels, so it won't disturb your daily activities or sleep, especially with its quiet sleep mode.

Installation requires a licensed HVAC professional, which adds to the upfront cost and complexity—something to consider if you want a simpler setup. A standout feature is the Wi-Fi connectivity, letting you control your AC remotely via smartphone or voice commands with Alexa or Google Assistant, adding convenience. The unit also offers multiple modes and fan speeds, plus features like auto swing and self-cleaning filters that help with maintenance and air quality.

The unit is fairly heavy at over 100 pounds, and while installation parts are included, professional help is necessary. This model is ideal for homeowners who want reliable, smart-controlled climate comfort for a large space and are comfortable with professional installation and maintenance.

The MRCOOL 12000 BTU Ductless Inverter Mini Split is a solid choice if you need both cooling and heating in a single unit, covering spaces up to around 550 square feet. With 12,000 BTUs, it’s suitable for small to medium rooms like bedrooms, small offices, or compact commercial areas. It operates quietly at about 43 decibels, which is comparable to a quiet conversation, making it unobtrusive during use. The 2-star energy rating suggests it’s moderately efficient, so it won’t be the lowest on energy bills but still reasonable for the price.

One of its strong points is the DIY-friendly design, making installation easier for those comfortable with some basic setup, and it includes helpful maintenance features like easy-to-clean filters and refrigerant leak detection to keep it running smoothly. Extra perks like timer mode and Active Clean Technology help maintain good air quality and convenience. However, if you expect ultra-low noise or top-tier energy efficiency, there might be better options, and it only supports a single zone, so it’s not ideal if you want to cool or heat multiple rooms independently.

This model is well-suited for users seeking a straightforward, year-round HVAC solution without complex installation or multi-zone needs.

The Daikin 24,000 BTU LV Series mini-split heat pump is an excellent choice for efficient year-round cooling and heating in spaces up to about 1,460 sq. ft. It offers solid cooling power at 21,400 BTUs and an even higher heating capacity at 25,400 BTUs, making it suitable for varied climates. Its high 19.5 SEER2 rating promises energy savings compared to older systems, supported by DC Inverter technology that helps adjust power use smoothly. Noise is relatively low at 37 dB, roughly the sound level of a quiet conversation, so it won’t be disruptive in living areas.

Installation is made easier with the included 15-foot Maxwell kit and mounting bracket, though professional installation is still recommended for mini-split systems. Additional features such as auto-changeover (switching between heat and cool automatically), Econo Mode for energy saving, and an air-purifying filter enhance comfort and air quality. It does not have an official Energy Star rating, which may be a consideration for buyers focused on certified green products.

This system is designed as a single-zone unit, making it ideal for one room or an open area rather than multiple zones. This Daikin model suits homeowners seeking efficient, quiet, and reliable climate control where ductwork isn’t feasible, offering a good balance of smart features and solid power.