10 Best Diy Mini Split 2025 in the United States

The Senville LETO Series Mini Split is a 1.5-ton (18,000 BTU) unit designed for cooling and heating spaces up to about 1,000 square feet. It offers a high SEER rating of 19, which means it runs efficiently and can help lower energy bills compared to less efficient models. This single-zone system is ideal if you need to control the temperature in one room or a focused area. One of its standout features is the inverter technology, which adjusts compressor speed to maintain steady comfort and save energy. It’s also Alexa-enabled, allowing control through voice commands or an app, which adds convenience but might be less important if you prefer simple manual controls.

This mini split is quiet, operating at around 30 decibels—comparable to a whisper—so it won’t disturb your daily activities or sleep. It includes heating capability with a heat pump that works effectively down to about 5°F (-15°C), making it suitable for moderate winter climates but potentially less ideal for extremely cold areas. The package comes with everything needed for installation, including a 16-foot line set pre-charged with refrigerant, but professional installation is recommended since DIY setup can be complex. The unit’s design is clean and unobtrusive, fitting well in most homes or small businesses.

Warranty coverage is solid, offering 5 years on the compressor and parts, giving peace of mind on durability. One downside is that it isn’t Energy Star certified, which might matter if you’re strictly looking for the highest environmental standards. Also, its single-zone setup means it won’t work if you need to cool or heat multiple rooms independently. This Senville model suits homeowners or small business owners looking for a reliable, energy-efficient, and quiet mini split with smart features, as long as they’re comfortable with professional installation and don’t require multi-zone control.

The MRCOOL DIY 36K BTU 4th Gen Mini-Split Air Conditioner is a great option for homeowners looking for an effective and efficient cooling solution. With an impressive 18 SEER rating, it stands out for its energy efficiency, potentially lowering your utility bills. The ability to control it via smart devices adds convenience, allowing you to adjust settings from anywhere with an internet connection. It also boasts a low noise level of 34 dB, making it suitable for residential environments without being disruptive.

One of its major advantages is the DIY installation feature. The precharged R-410A quick connect line set simplifies the setup process, meaning you can install it without needing specialized tools or professional help. This is particularly appealing for those who prefer to handle home improvements on their own.

However, there are some drawbacks to consider. While it's designed for easy installation, some users might still find the process challenging, especially if they have limited experience with HVAC systems. Additionally, the unit's cooling capacity of 36,000 BTU is substantial, suitable for larger spaces, but might be overkill for smaller areas, leading to inefficient energy use if not matched correctly to the space. Moreover, while the low ambient cooling feature allows it to operate in cooler temperatures, it may not be necessary for all climates, which could limit its appeal based on regional usage. The weight of 262 pounds also means it requires proper support and installation considerations.

The MRCOOL DIY Mini-Split is an excellent choice for those wanting an energy-efficient, quiet, and user-friendly cooling solution, especially for larger spaces. Potential buyers should evaluate their installation experience and space requirements to ensure it fits their needs effectively.

The Senville LETO Series Mini Split is a solid choice if you're looking to install a single-zone heating and cooling system yourself or with professional help. It delivers 12,000 BTUs (about 1 ton), which is suitable for medium-sized rooms like bedrooms or small living areas. Its SEER rating of 19 indicates good energy efficiency, helping save on electricity bills compared to less efficient units, although it is not Energy Star certified.

This system is versatile, offering cooling, heating (effective down to about 5°F or -15°C), dehumidifying, and fan functions, making it a year-round climate solution. One standout feature is its Alexa compatibility, allowing you to control temperature settings with voice commands or an app, adding convenience to daily use. The unit comes with an installation kit including a 16-foot line set pre-charged with refrigerant, but professional installation is recommended as it involves handling refrigerant and electrical connections.

Noise levels are generally low for mini splits, making it suitable for bedrooms or quiet spaces. A 5-year warranty on parts and compressor offers peace of mind. The white, compact design fits nicely in many room styles without standing out. If you want a reliable, energy-efficient mini split with smart control and decent heating ability for mild to moderate climates, the Senville LETO is worth considering. However, if you need Energy Star certification or plan multiple zones, you might want to explore other options.