10 Best Ductless Air Conditioners 2025 in the United States

The DELLA Versa Series 12000 BTU Mini Split Air Conditioner is a solid choice for those looking to cool or heat a space up to 550 square feet. With a 19 SEER2 rating, it is highly energy-efficient, promising up to 30% power savings, which is great for reducing electricity bills. The unit operates quietly at 42 dBa, making it suitable for bedrooms or living areas where noise is a concern. Additionally, it's equipped with smart features like remote control, Alexa compatibility, and various modes (cooling, heating, dehumidifying, sleep, and turbo), enhancing convenience and personalization of comfort settings.

The system also includes a heat pump that works in temperatures as low as 5 degrees Fahrenheit, adding to its versatility through different seasons. One of the standout features is the ability to sense room temperature from the remote and adjust airflow accordingly, which enhances personal comfort and can lead to more efficient operation. The installation kit is comprehensive, but it's important to note that professional installation is required, which could add to the overall cost and complexity.

This air conditioner is not suitable for DIY enthusiasts. Moreover, while it has a solid coverage area and a variety of features, adjusting the freon levels may be required if the line set length is altered, which underscores the need for professional setup. Given its capabilities and features, this unit is ideal for users who are looking for a quiet, efficient, and smart air conditioning solution.

The Senville LETO Series Mini Split Air Conditioner Heat Pump is a versatile and powerful option for those seeking both cooling and heating solutions. With a cooling capacity of 18,000 BTU, it can efficiently manage temperature control in spaces up to 1,000 square feet, making it suitable for larger rooms or small commercial spaces. The SEER rating of 19 indicates good energy efficiency, although it is not Energy Star compliant, meaning it might not be the most efficient option available.

One of its notable features is the low noise level of 30 dB, which ensures quiet operation, beneficial for environments like bedrooms and offices where minimal noise is crucial. This unit is designed to cover a single zone, which limits its use in multi-room setups but is ideal for concentrated heating or cooling in a specific area. Installation is somewhat straightforward with the included kit, though professional installation is required, which could add to the initial cost.

Maintenance is made easier with pre-loaded refrigerant and a 5-year warranty on parts and the compressor, although labor is not included in the warranty. Additional features such as integration with Alexa for voice control, a dehumidifier, fan, and turbo function add to its versatility, making it a comprehensive all-season appliance. The product is also aesthetically pleasing, suitable for both home and business environments.

The COSTWAY 24000BTU Mini Split Air Conditioner and Heater is a versatile and powerful ductless unit designed for rooms up to 1500 sq. ft. With a high Seasonal Energy Efficiency Ratio (SEER) of 18.5, it promises energy efficiency, which is enhanced by its innovative inverter technology. This technology helps in reducing power consumption by adjusting the power supply frequency without frequently turning the compressor on and off.

The unit operates at a noise level of 50 dB, which is relatively quiet, making it suitable for bedrooms and living areas. The air conditioner offers five modes: auto, cool, dry, heat, and fan, along with four fan speeds, sleep mode, ECO mode, and turbo function, ensuring comfort throughout the year. It also features self-cleaning and auto-defrost functions, which help in maintaining the unit with minimal effort and improving its longevity.

One downside is the requirement for professional installation by a Licensed HVAC Installer, which may add to the initial cost. Additionally, while the product comes with a comprehensive warranty of five years for parts and eight years for the compressor, potential buyers should ensure that R32 refrigerant, which is more eco-friendly, is readily available in their area. This unit is particularly beneficial for those seeking an all-in-one heating and cooling solution with high energy efficiency and multiple operation modes.