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Shop MRCOOL DIY systems by room count — from single-zone installs to complete six-zone packages, every kit ships with pre-charged line sets.
DIY made real
MRCOOL built the DIY line so homeowners can skip the installer without skipping the quality. Here's the whole project:
Use the size estimator or send us your room dimensions — we confirm BTUs for every room, free.
Hang the air handler, set the condenser, and click together MRCOOL's pre-charged line sets. No vacuum pump, no refrigerant license — just hand tools.
Have a licensed electrician wire the dedicated circuit and disconnect, then control everything from your phone. Most single-zone installs wrap in a weekend.
MRCOOL DIY 5th Gen — everything arrives in one kit.
Cold-climate readyMRCOOL Hyper HeatCentral-unit power with mini split efficiency — full heat deep below freezing.
Shop Hyper Heat
PopularMRCOOL UniversalFlexible central heat pumps with no-vac install for efficient whole-home comfort.
Shop Universal
High-efficiency ductless systems from Senville, Daikin, GREE and more — built for professional installation and larger comfort projects.
About Chill Mini Splits
Since 2018, our mission has always been to provide the absolute best quality products, customer experience, and prices available in the mini split industry without exception. We choose to only sell the best performing mini splits, learning them inside and out to ensure your experience with us is second to none.
Verified
3,223 verified customer reviews
Excellent customer service and prompt shipping. Chill Mini Splits helped me choose the right system and answered my questions quickly.
Nice system and easy to install. Good instructions and great phone assistance with a few questions.
Not too hard to install and works wonderfully! Customer service /tech support was soooo helpful and friendly when I couldn’t get the app to work. We got it figured out though!
These condenser risers are fantastic, I didn't want to drill into the concrete and these are the perfect solution, they are a very practical solution with a small footprint and easy to install, 10/10 would go with this again every time
line set shipped quickly, arrived and worked perfectly! so grateful that they still had inventory of the 410a line sets!
the coupler kit shipped fast, arrived on time and worked perfectly!
My 5th Mr cool install and very happy with the end result per usual.
Simple to install, beats concrete pad and works just as well
Great buy
Great product. Perfect for small shed moved and insulated for additional space. Recommend...actually installing another larger one next week. Thanks for making this easy and affordable.
This unit works very well cooling my 1800sq ft house here in Mn. Very easy installation.
Wall mount works good very easy to install.
Easy install and works great.
The system seems to be solid, was easy to install, and is operating well. Chill didn't send this as fast as we had hoped, but the price was right and it did arrive in time for to get this thing set up.
This spring I needed to replace a tired and leaking AC system. I was always miffed at the high cost of "professinally installed systems". As an avid DIY'er when I saw the Mr. Cool Systems on line I knew I would have to give it a go. The install went flawlessly, including: compressor, lines, line covers, and internal heads. I have had several months now to test the system. In that short period of time we have needed both the heating and cooling functions of our new Mr. Cool system. The system has worked flawlessly since the install. We could not be happier.
After doing quite a bit of research on DIY mini-split systems, MrCool consistently came out on top. I was looking for a 2-zone system that could be expanded to 3 zones in the future. One thing I quickly learned is that ordering all the correct components can get a bit confusing. Fortunately, Chill Mini Splits made that process much easier with their website.
The only disappointment was the shipping time. The website indicated about one week, but it ultimately took two. Since this was a freight shipment, I was also a little concerned about the delivery experience, but the shipping company was excellent. They worked with me to schedule a delivery day that fit my schedule.
I reached out to Chill Mini Splits with a question during the process, and they responded within one business day, which I consider very good customer service.
For the installation, I highly recommend watching a few YouTube videos beforehand, but don't skip the written instructions. There are several important details covered in the manual that aren't mentioned in most videos.
One suggestion for MrCool: create a comprehensive installation video. It would make the installation process much easier and would probably help sell more systems.
As for the installation itself, it took my son and me about nine hours from start to finish. We took plenty of water breaks because it was an extremely hot day. We're both fairly handy, and I wouldn't describe any individual step as difficult. There are simply a lot of steps, and it's important to complete them in the correct order.
We've been using the system for about a week now, and I honestly have no complaints. The units cool extremely well, and the mobile app is definitely worth installing. Being able to control the system remotely is a great feature.
My biggest suggestion to MrCool would be to offer more refrigerant line length options. In my installation, one indoor air handler is located almost directly above the outdoor condenser, but the shortest pre-charged line set available was 12 feet. As a result, I had to coil a significant amount of excess line behind the unit. It works fine, but you'll definitely want to plan ahead for how you'll hide or protect the extra line set. I'm also planning to add additional protection for the exposed lines.
Overall, I'm extremely happy with both the purchase and the system's performance. In fact, I'm already considering adding the third zone much sooner than I originally planned because we've been so pleased with how well everything works.
Overall Rating: 5/5. Excellent product, straightforward installation for a capable DIYer, and a great value. Just be prepared to spend some time planning the installation and managing any excess line set.
My husband was able to set up our system (1 condenser unit w/ 3 wall units) in approximately 2 days all by himself. Fairly easy, if you’re somewhat handy! The mini splits themselves are basically silent and SO efficient with the cold air. We could not be happier!!!!
The store offers easy ordering, fast shipping, and responsive customer service. Installation is straightforward with DIY-friendly products, though instructions could be clearer. Systems perform well with efficient cooling/heating and quiet operation. Some cust...
Rebates & incentives
Many utilities and several states run rebate programs for high-efficiency heat pumps. Programs change often and vary by ZIP code — here's how to capture yours.
Look up your ZIP in the ENERGY STAR rebate finder, or send it to us and we'll check what's active near you.
Utility programs usually favor ENERGY STAR and high-SEER2 heat pumps — most systems we sell qualify.
Most rebates are a simple post-purchase form. We'll send the spec sheets and documentation you need.
Amounts shown are maximums; actual savings depend on income, household size, utility, and program rules. Some programs require installation by a licensed or participating contractor and/or specific equipment efficiency ratings. Rebate data by Rewiring America. Not tax or legal advice — verify with the program before purchase. Questions? Call us at (888) 231-8920.
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Good to know
Mini splits are sized in BTUs. As a quick rule, plan on 20–30 BTU per square foot — roughly 12,000 BTU for a 500 sq ft space. Ceiling height, sun exposure, and insulation shift the number, so use the size estimator above or send us your room sizes and we'll spec it for free.
Yes. MRCOOL DIY systems ship with pre-charged, quick-connect line sets, so there's no vacuum pump and no refrigerant license involved. If you can mount a TV and drill one 3-inch hole, you can handle the install. We do recommend a licensed electrician for the dedicated circuit and disconnect.
Every system we sell is a heat pump, so it cools in summer and heats in winter — far more efficiently than baseboards or older furnaces. In sub-freezing climates, look at Hyper Heat models, which keep heating well below 0°F.
Professional mini split installation is often quoted at $1,500–$3,000+ per zone depending on your market. With a DIY system that labor stays in your pocket — most customers finish a single zone in a weekend with basic tools.
In-stock systems ship quickly with free curbside freight delivery, typically arriving in about 4–10 days. Before you sign, give every box a quick once-over and note any damage on the delivery receipt — that keeps any freight claim painless.
As an authorized dealer, every system we ship carries its full manufacturer warranty — just register it after installation. Many local utilities also offer heat pump rebates; our team can help you find what applies in your area.
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