Best Split-System Air Conditioners of 2025

"I find this unit to be a great affordable option! The installation was a breeze, and it works perfectly. Plus, the app is really user-friendly, which makes me very satisfied with my purchase."

"After finishing a small space above my garage, I needed a compact heating and air conditioning solution. I chose this 9,000 BTU mini split system, and it was the perfect choice! The packaging was exceptional, with careful materials ensuring everything arrived in perfect condition. It’s ideal for small spaces, operates quietly, and the remote is very intuitive. I just wish the connection piping was a bit longer, but overall, I highly recommend it!"

"I bought this 24,000 BTU unit on December 19 and just installed it. It really puts out maximum heat! I haven’t tried the AC yet, but I am very satisfied so far."

"I've had this mini split for about two months now, and it's been a game changer for my office in my pole barn. Initially, I struggled with the installation as a complete DIY, especially the HVAC portion, but I eventually got help for the refrigerant. The unit quickly cools and heats my workspace efficiently, and I've noticed my electricity usage dropped by half compared to my previous portable AC. Super quiet operation too! I plan to install more units in my house."

"I was very satisfied with the DELLA 18000 BTU mini split AC. Even though it's labeled as a non-DIY unit, I managed to install it myself without prior mini split experience. I recommend having the right tools, such as a torque wrench and a vacuum pump, to avoid refrigerant leaks. The unit works great in cooling my garage and is incredibly quiet. However, I wish there were better instructions for wiring the outside unit."

"I installed this unit for a friend, and it significantly reduced his electric usage by half during the summer. Now that it's colder, it's effectively aiding the gas furnace to keep the living area warm. The installation requires some knowledge and special tools, but once you have them, it's quite straightforward. It's super quiet and efficient."

"I chose Della because of their advertised customer support, and my experience has been fantastic. The installation was smooth, and the unit operates flawlessly. It’s remarkably quiet, which makes it easy to sleep with it running. Plus, I love the swing capability for air flow!"

"I handled the installation myself, and while it required more effort than I anticipated, the unit cools my 12' x 12' bedroom in minutes and keeps my entire house comfortable. The outside unit is also very quiet, and I opted for wall mounting, which was effective."

"After purchasing the DELLA 9000 BTU, I found the unit was well-packaged with clear installation instructions. It quickly cooled my 340 sq ft room, and the customer service was outstanding when I encountered an issue. They even offered to replace the outside unit at no cost!"

"I found the customer support to be excellent and the installation process was a breeze. The unit works effectively for my needs."

"Unfortunately, my unit arrived damaged and missing parts, which was disappointing. The packaging could have been better, and the instructions lacked detail."

"The 5/8 copper line was difficult to manage without rippling, making it hard to create a good flare. I reached out for support, but I'm still waiting for a response after a week."

"This is a fantastic product! I highly recommend the Senville for its quality and performance. The installation can be a bit tricky, but the unit works wonderfully once set up. It keeps my garage comfortable year-round, even in extreme temperatures."

"I’m so glad I purchased the Senville Mini Split. It has transformed my home office experience. I can set it to 75 degrees and it cools the room in just minutes! Plus, I expect to save around $100 a month on my energy bill."

"One of the best decisions I've made was getting this unit. The quiet operation is impressive, and the fact that it integrates with my Alexa system makes it incredibly convenient. I can control it from anywhere, which is a game changer for my work-from-home setup!"

"Installing my second MrCool DIY unit was a breeze, thanks to the clear instructions. I made sure to read the entire manual before starting, which made a huge difference. Having a helper for heavy lifting was also essential. The unit works silently and keeps my bedroom at the perfect temperature. I’m genuinely surprised by how much my electricity bill has decreased since installation!"

"I finally got around to installing the unit we bought last summer for our man cave, and it's fantastic! With help from my electrician brother-in-law, the installation was straightforward. In just three days, it has been heating like a dream. I loved it so much that I purchased another for my wife's sewing room!"

"After struggling with three different split systems in our old house, the MrCool is the only one that has worked flawlessly! I was amazed that we could install it ourselves without needing a technician. The cold air output is impressive, unlike my previous units. The quieter fan and the turbo mode really make a difference too. I plan to buy more once my window units fail!"

"I found that the old, undersized central air just wasn't doing the job, so I researched mini-split units and chose Della. As a DIY enthusiast, I spent two days installing the three indoor units in very hot weather. I took my time, and bending the copper was manageable. One unit wasn't on an exterior wall, so I had to get creative with the drainage, opting for a gravity drain to avoid pump issues. The kids love having their own temperature control, and I can monitor the rooms through the app on my phone. They're really cold now! I'm looking forward to seeing my first bill!"

"I was really disappointed with the temperature control of this unit. No matter what I set it to, it either gets too cold or too hot. I reached out to support, but after refusing a return, they offered a new thermostat which didn't resolve the issue. I installed everything correctly, but it requires constant monitoring to maintain comfort. In contrast, I bought another mini-split from Amazon that works perfectly!"

"I had some challenges during the installation process, which was more complicated than I expected. However, I found it manageable. The product itself cools great and operates quietly, both inside and outside. I did have to purchase a 50-foot kit to connect all three units where I wanted them, but overall, it performs well in keeping my home nice and cool in central Tennessee."

"I installed this unit in my basement den with no other heating or cooling. The HVAC calculator helped me choose the correct BTU size, and it arrived quickly with everything I needed for installation. With a line set cover kit, I had it running in an afternoon. I previously bought a RobinAir vacuum pump to ensure a leak-free seal. It works great, and my electric bill barely increased! It kept my room warm even on a 22-degree night! I’m very pleased; the total cost was under $1,000, much less than the $6,000 quote I received from a big box store."

"My shop is about 460 sqft, an old detached garage that wasn't insulated. After insulating with R13, I installed the 12k BTU unit. This winter, it has kept the temperature above 60 degrees! The shipping was fast, and the instructions were clear. I bought a cheap vacuum pump for safety, and it worked perfectly. I can hear some vibration when the compressor turns on, but my wife says it's not as loud as I think. I wish I had done this years ago!"

"I purchased this Ductless Mini-Split for my cabin, and it has exceeded my expectations! It keeps the 600 sq. ft. area at a consistent temperature. I added wireless control to operate it from my phone, and it’s so convenient arriving to a cool or warm cabin. The installation was simple, it runs quietly, and there has been no increase in my electric bill. This was one of the best purchases for my cabin build, and I'm planning to buy another for the upstairs!"

"I installed the unit today. As a DIY person with years of refrigeration experience, I found the unit to be of good quality. The outside condenser is very quiet. I’m running it on turbo mode to pull the temperature down, but I expect it will be quieter on other settings. The installation instructions were clear, unlike my last experience with a different brand."

"I purchased this unit for an additional room and I'm extremely pleased with its performance. It works very well and is quiet. The price was also great. I appreciate how well it heats and cools the space."

"We mainly bought this for backup heat during winter. It cooled our place well last summer, and now that it’s colder, it’s working great. The fan is so quiet that I hardly notice it. My only issue was the lack of a template for installation, which made the process more tedious."