10 Best Air Conditioners 2025 in the United States

The Senville LETO Series Mini Split Air Conditioner Heat Pump offers a substantial cooling capacity of 12,000 BTU, making it suitable for cooling medium-sized rooms. One of its standout features is the high Seasonal Energy Efficiency Ratio (SEER) of 20.8, which indicates it operates efficiently and could help reduce electricity bills. The inclusion of a DC Inverter further enhances its energy efficiency and performance consistency.

This model supports voice control through Alexa, allowing for convenient adjustments via app or voice commands from anywhere, which could be appealing to tech-savvy users or those who enjoy smart home integration. Additionally, it serves multiple roles as an air conditioner, heat pump, dehumidifier, and fan, making it versatile for year-round use. The unit operates relatively quietly, which is ideal for bedrooms and living areas where noise can be disruptive.

It does require professional installation, which might add to the initial cost. Although it comes with a comprehensive 5-year warranty on parts and the compressor, labor costs for installation are not covered. The product does not meet Energy Star compliance, which might be a consideration for eco-conscious buyers. Its compact and stylish design allows it to blend into both residential and commercial settings without compromising aesthetics. The package includes necessary installation components, making it convenient, but the pre-loaded refrigerant accommodates only up to 25 ft, which could limit installation flexibility in larger spaces.

The COSTWAY 12000BTU Mini Split Air Conditioner & Heater is a versatile choice if you need a ductless unit that can cool and heat spaces up to about 750 square feet. Its cooling power of 12,000 BTU and 1-ton capacity make it a good fit for medium-sized rooms like living rooms or large bedrooms. One of its best features is high energy efficiency, with a SEER rating of 20 and an EER of 10, meaning it can help keep electricity bills lower compared to less efficient models. It uses eco-friendly R32 refrigerant, which is better for the environment than older types. The inverter technology helps the compressor run smoothly without frequent on/off cycles, saving energy and reducing wear. Noise level is reasonably low at 51 decibels, so it won’t be too disruptive during use.

You get five modes including cooling, heating, dry, fan, and auto, plus multiple fan speeds and extra settings like sleep mode, turbo, and ECO mode, giving good flexibility for all seasons. The unit also features a self-cleaning function and washable filter, which helps maintain air quality and reduces maintenance. However, installation requires a licensed HVAC professional, so you should factor in that cost and effort. The system’s size and necessary outdoor unit might also need enough wall space.

With a solid 5-star energy rating and a strong manufacturer warranty covering parts and compressor, this model offers reliable performance. If you want an energy-saving, quiet, year-round solution for a medium-sized room and don’t mind professional installation, this mini split is a practical option to consider.

The Daikin 18,000 BTU LV Series is a ductless mini-split air conditioner designed to cool and heat spaces up to around 1,000 square feet. With a strong cooling capacity of 18,000 BTUs and an impressive 19.5 SEER2 rating, it promises efficient year-round climate control while keeping energy bills in check. This model excels in versatility, working well in a wide temperature range from below freezing up to very hot conditions, making it suitable for various climates and room types like basements, sunrooms, or additions where traditional ductwork isn't an option.

Noise-wise, it operates quietly at 37 decibels, which should be quite unobtrusive in most living spaces. The unit also features convenient extras such as remote control operation, customizable airflow, and an air purifying filter to improve indoor air quality. Installation is made easier with a 15-foot kit and wall brackets included, although professional installation is recommended due to the system's complexity and electrical requirements. The 230V power supply and 1.5-ton capacity fit well for medium-sized rooms.

One potential drawback is the initial cost and installation process compared to window units, but the energy savings and comfort benefits can justify it for many users. This Daikin model is a solid pick for those needing a high-efficiency, quiet, and flexible heating and cooling solution without existing ductwork.