10 Best Mini Split Air Conditioners 2025 in the United States

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.