10 Best Mini Split Air Conditioners 2025 in the United States

The MRCOOL DIY 24K BTU 4th Gen mini-split air conditioner is designed for single-zone cooling needs, ideal for spaces around 1000 square feet. With a cooling capacity of 24,000 BTU (2 tons), it can efficiently cool medium to larger rooms. Its standout feature is a high SEER rating of 20.5, which means it uses energy very efficiently, helping reduce electricity bills compared to less efficient models. The unit operates quietly at 33 decibels, making it suitable for bedrooms or living areas where low noise is important.

One of the biggest advantages is the easy DIY installation, thanks to pre-charged quick connect line sets — no special tools or professional help required, which can save you on installation costs. It also offers smart control via Apple or Android devices, allowing you to adjust settings remotely. Additional useful features include leakage detection to protect the compressor and a low ambient cooling mode that works even in colder weather down to 5°F. However, it is limited to a single zone, so if you want to cool multiple rooms separately, this model might not meet that need. Also, the unit is fairly large and heavy, which might require careful planning for wall mounting.

Its Energy Star certification ensures reliable efficiency. This mini-split represents a strong option for those seeking a powerful, energy-efficient, and user-friendly cooling solution for one main living space.

The TOSOT 24,000 BTU Mini-Split Air Conditioner and Heating System is a solid choice for cooling and heating spaces up to around 1500 square feet. Its 24,000 BTU capacity suits medium to larger rooms well. With a SEER2 rating of 19 to 22, it is energy-efficient, helping you save on electricity bills while providing reliable temperature control. It operates quietly between 22 and 36 decibels, making it a good fit for bedrooms, offices, or any place where low noise is important.

This model supports WiFi and voice control through the Gree+ app, allowing for easy remote adjustments without needing to be near the unit. This is a convenient feature for modern smart homes. The unit includes a 16-foot copper line set which simplifies installation, but since it is a single-zone system, it is designed to cool or heat one room or area at a time. Installation and maintenance require professional help, which is common for mini-splits but something to keep in mind. One minor inconvenience is that the unit might arrive in multiple packages, so you’ll need to ensure all parts are received before starting installation.

The system is also designed to work efficiently in a wide temperature range, cooling well even when it's very hot outside and heating effectively when it's cold. Backed by a 5-year warranty, it offers peace of mind for durability. If you want a quiet, energy-saving, and smart-controlled mini-split for one main living area, this TOSOT Cosmo model fits the bill well. However, if you need to cool or heat multiple zones or rooms, you might want to look into a multi-zone system instead.

The TOSOT TST-MZ-M36-D1818 is a dual-zone mini-split air conditioner and heat pump designed to cool and heat up to about 2,400 square feet efficiently. Its combined 36,000 BTU capacity, split into two 18,000 BTU indoor units, allows you to control temperatures separately in two rooms, which is great if you want personalized comfort. With a high SEER2 rating of 21, this unit is very energy-efficient, helping you save on electricity bills compared to standard models. It's also Energy Star certified and qualifies for federal tax rebates, which adds to its cost benefits. The system operates quietly at 63 decibels, though this noise level is moderate and might be noticeable in very quiet spaces.

Installation is more straightforward than traditional central AC as it requires no ductwork, and it comes with a 16.4-foot copper line set, although you’ll need to get the power cord separately. Maintenance is relatively simple since each indoor unit can be serviced individually. The unit handles extreme weather well, operating efficiently even in very cold or hot climates, which is useful if you live in areas with harsh seasons. You can control the system remotely via WiFi through an app, including voice commands with Google Assistant, adding convenience.

The size and weight (over 300 pounds) might require professional help during installation. Also, the product is shipped in multiple packages, so make sure you have all parts before arranging installation. With a five-year warranty, this system offers solid reliability and smart home compatibility, making it a strong choice if you need flexible cooling and heating for two rooms with good energy savings.