10 Best Diy Mini Split 2025 in the United States

The PIONEER Diamante Series Ductless Mini-Split Air Conditioner Inverter Heat Pump is a versatile option for both cooling and heating needs. With a BTU rating of 9000, it is suitable for small to medium-sized rooms. It boasts a high SEER rating of 20, indicating excellent energy efficiency, which can lead to significant savings on energy bills. Additionally, the system operates quietly with a noise level of just 38 dB, making it ideal for bedrooms or living rooms where a peaceful environment is preferred.

The unit supports one zone, which means it's designed to control the temperature of a single area effectively. Installation is a split system type, which may require professional help but ensures a more permanent and integrated setup in your home. One of its notable features is the dual swing, which enhances air distribution for better comfort. The kit comes complete with all necessary installation accessories, including a 16 ft. line set and vibration absorber feet.

However, being a single-zone unit, it might not be the best choice for larger homes or commercial spaces requiring multi-zone setups. Additionally, while the heating capability (HSPF of 10.5) is good, it may not be sufficient for extremely cold climates.

The DELLA Versa Series 12000 BTU Mini Split Air Conditioner is a strong option for those looking to cool or heat a single zone up to 550 square feet. With a high SEER2 rating of 19, it is energy-efficient, making it a cost-effective solution in the long run. One of its notable features is its quiet operation, ranging between 30-41 dBa, which ensures minimal disturbance.

The unit also includes smart settings like auto defrost, self-diagnosis, and multiple fan speeds, adding to its convenience and ease of use. It is compatible with Alexa, allowing for voice control, which is a modern touch for tech-savvy users. However, while it’s advertised in the DIY mini-split category, it requires professional installation due to the need for line-set vacuuming and potential freon level adjustments. This could be a drawback for those specifically looking for a DIY solution.

The included 16.4 ft installation kit provides ample length for standard installations, but any alterations will need professional handling. Its heating capability is impressive, functioning in temperatures as low as -4°F. While the unit claims to cover up to 750 square feet, which is generous, it remains most effective within the 550-square-foot range stated in the product brief. This unit is best for users seeking a reliable, quiet, and energy-efficient single-zone mini split system but are willing to invest in professional installation.

The MRCOOL DIY 24K BTU 4th Gen 1-Zone ductless mini-split air conditioner is a powerful unit with a 24,000 BTU rating, making it suitable for cooling large spaces up to 1000 square feet. With a high SEER rating of 20.5, it is energy efficient, which can help lower electricity bills. The unit is Energy Star certified, ensuring it meets strict energy efficiency guidelines.

It is designed for easy DIY installation, featuring precharged R-410 Quick Connect Line Set, which allows users to set up without needing special tools or professional assistance. Additionally, it includes a low ambient cooling feature, enabling cooling down to 5 degrees, and an auto-restart function for convenience after power outages. Enhanced control via Apple or Android smart devices adds a layer of modern convenience, while leakage detection helps prevent damage by alerting users to low coolant levels.

The noise level is relatively low at 33 dB, contributing to a quieter indoor environment. One limitation is the single zone setup, which may not be ideal for homes requiring multi-zone cooling. However, the heating capability is decent with a 10.5 HSPF rating, making it a viable option for moderate heating needs. This unit is well-suited for those looking for a powerful, efficient, and user-friendly single-zone air conditioner with robust cooling and moderate heating capabilities.