10 Best Portable Mini Split Air Conditioners 2025 in the United States

The Senville LETO Series Mini Split Air Conditioner Heat Pump is a versatile and efficient unit designed for cooling and heating spaces up to 400 square feet. With a cooling capacity of 9000 BTU and a high Seasonal Energy Efficiency Ratio (SEER) of 21.5, it promises to be energy-efficient, though it is not Energy Star compliant. One of its standout features is the compatibility with Alexa, allowing for convenient voice control and remote adjustments through an app, making it user-friendly for tech enthusiasts.

The 4-in-1 functionality (including air conditioning, heat pump, dehumidifier, and fan) adds to its versatility, making it suitable for year-round use. Its quiet operation at 25 dB is ideal for bedrooms and living spaces, ensuring minimal disturbance. The installation kit includes everything needed, but professional installation is required, which could be seen as a drawback for those looking for a DIY solution. The unit is backed by a solid warranty, offering 5 years on parts and the compressor, though labor costs are not covered.

Despite not being Energy Star certified, it remains an efficient choice for those looking to maintain comfort in their homes or small commercial spaces. The Senville LETO Series offers a blend of advanced features, energy efficiency, and quiet operation, making it a strong contender in the portable mini-split air conditioner market.

The Della Versa Series 12000 BTU Mini Split Air Conditioner is a solid choice for cooling and heating rooms up to 750 square feet. It boasts a high energy efficiency rating with a 19 SEER2 rating, which means it can help you save on electricity bills. Additionally, it operates quietly, producing only 30-41 dBa, making it ideal for bedrooms or living areas where noise can be a concern.

The unit comes with a variety of smart features, including auto defrost, self-diagnosis, sleep mode, and eco energy saving mode, adding convenience and user-friendliness. The device also includes a smart sensor that adjusts the temperature based on the remote control's location, enhancing personal comfort and promoting energy savings.

However, the installation requires professional assistance, as it involves line-set vacuuming and potential freon adjustments if alterations are made to the line-set length. This could add to the initial cost and complexity. The air conditioner includes a complete installation kit with a 16.4 ft line set and a 78.7-inch drain pipe, but its weight of 76 pounds may make it less portable. It is also worth noting that even though the unit is pre-charged and designed for efficiency, any adjustments during installation might affect these benefits. The Della Versa Series is great for energy-efficient, quiet cooling and heating with smart features, but it comes with a more complex installation process that requires professional help.

The COSTWAY 18,000 BTU Mini Split Air Conditioner is a solid choice for anyone needing efficient cooling and heating in spaces up to about 1,250 square feet. Its cooling power of 17,000 BTU (close to the advertised 18,000) is strong enough for medium to large rooms, making it suitable for homes or offices. It also includes a heat pump capable of heating, which adds year-round comfort with four modes: cool, heat, dry, and fan. One of its biggest advantages is its high energy efficiency, boasting a 21 SEER2 rating and Energy Star Most Efficient 2024 certification, which means it uses less electricity than many other models, helping reduce power bills. The inverter technology adjusts compressor speed smoothly, avoiding frequent stops and starts, which is both energy-saving and beneficial for maintaining a steady temperature.

Noise-wise, it operates at around 49 dB, which is moderate and similar to a quiet conversation, so it won't be too disruptive indoors. Installation requires a licensed HVAC professional, as it's a split system with indoor and outdoor units connected by copper piping; this means it’s less portable in the sense of easy DIY moves, but once installed, it runs very efficiently and quietly. The unit also features useful extras like a remote control with a good range, a 24-hour timer, turbo mode for fast cooling, and a self-cleaning function that helps reduce maintenance and improve air quality. Although the package includes everything needed for installation, you should budget for professional setup.

This mini split is well suited for someone looking for an energy-efficient, quiet, and versatile heating and cooling solution for a fairly large space, with the understanding that it’s a semi-permanent installation rather than a truly portable option.