10 Best Ductless Air Conditioners 2025 in the United States

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.

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 MRCOOL 24000 BTU ductless mini split AC and heat pump is designed to cover spaces up to about 1,050 square feet, making it a solid choice for medium-sized rooms or open-plan areas in homes, offices, or commercial settings. Its dual heating and cooling functionality allows comfortable year-round use, which adds good value for those seeking an all-in-one HVAC solution. With a noise level around 43 dB, it operates quietly enough for most living or working environments without being completely silent.

Installation is designed to be DIY-friendly, especially since it’s part of MRCOOL’s Easy Pro series, potentially saving on professional installation costs. Maintenance is user-friendly too; it features easy-to-clean filters and an Active Clean Technology that helps keep indoor air fresh. Additional perks include a timer mode and refrigerant leakage detection, which are handy for convenience and safety. However, if you need a multi-zone system to cool or heat several rooms independently, this model supports only a single zone, which might limit flexibility.

This unit is a practical option if you want a straightforward, easy-to-install mini split that handles both heating and cooling, but if energy efficiency or multi-zone control is a priority, you may want to look for other models.