Learn it. Then do it yourself.
Straight answers from DIYers who installed their own MRCOOL® systems: sizing, tools, wiring, line sets and the questions people ask before they buy.
MRCOOL DIY® Line Set Lengths: 16, 25, 35 or 50 ft (and When You Need a Coupler)
How to measure your run, the 75 ft maximum, the height limits by size, and how to extend the included 25 ft set with a coupler kit.
Is MRCOOL DIY® Worth It? What It Really Costs to Do It Yourself
The full cost: the system, the small parts, the electrician, and how to compare it fairly against an installer's quote. Plus the honest downsides.
What Size Mini Split Do I Need? MRCOOL DIY® Sizing by Room
A simple square-footage chart for 9K to 36K, the room details that push you up a size, and when two smaller units beat one big one.
MRCOOL DIY® Electrical Requirements: Breaker Size, Wire Gauge and 115V vs 230V
Every 5th Gen single-zone size, its voltage, minimum circuit amps, max breaker and typical wire gauge, plus the short list to hand your electrician.
Does MRCOOL DIY® Need a Vacuum Pump? How Quick Connect® Line Sets Work
No. The Quick Connect® line set is pre-charged and sealed at the factory. Here's how the fittings work, the mistakes that cause leaks, and how to d...
Can You Really Install a Mini Split Yourself? An Honest Look at MRCOOL DIY®
Yes, if you can hang a heavy shelf and turn a wrench. Here's what's really involved, the parts that feel scary (and aren't), and the one job we tel...
Get the DIY Mini Split Install Handbook
All 13 steps, the clearance, torque, wiring and line set tables, QR codes to every MRCOOL video, a sign-off checklist, and a 10% off code for your system.