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What’s Involved In Ductless Mini Split Installation?

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Ductless Mini Split Outside 1

What To Expect with Ductless Installation & Why DIY Isn’t Recommended At Times

Professional installation is critical for ductless systems to work properly and efficiently.

Here’s what the installation process involves and why DIY installation isn’t recommended:

1. Sizing Things Up

Dawsons’ Air does not just guess where the units go. We measure your rooms, check your electrical panel, and calculate exactly how much power you need. We find the “sweet spot” for every indoor unit to ensure you aren’t stuck with hot or cold spots.

2. Mounting the Indoor Units

Mount the units high on the wall for the best air spread. This involves drilling a small, 3-inch hole for the lines and making sure everything is perfectly level. If it’s tilted even a little, you’ll end up with water leaking down your wall.

3. Setting Up the Outdoor Hub

The outdoor compressor needs a solid, level home—either on a pad or a bracket. Tuck it away from the elements but keep it accessible for maintenance. Mmake sure it’s secured tightly so it doesn’t rattle or keep the neighbors awake.

4. The Tricky Part: Refrigerant Lines

This is where DIY usually goes wrong. We cut, flare, and connect the lines to prevent leaks. Then, we use a vacuum pump to suck out every drop of moisture before charging the system with the exact amount of refrigerant. Even a tiny mistake here can lead to a total system failure.

5. The Final Test

We don’t just flip a switch and leave. We test every connection, check the temperature output of every unit, and make sure the drainage is perfect. Finally, we’ll sit down with you to show you how the remote works so you’re in total control.

Travis Dawson

Travis Dawson

Travis Dawson is the founder and president of Dawson's Electric & Air, serving homeowners throughout the Triangle area of North Carolina. With more than 30 years of experience in electrical, HVAC, construction, and home renovation, he has built a reputation for quality workmanship, practical expertise, and honest advice. Before founding Dawson's Electric & Air in 2005, Travis worked as an electrician and industrial maintenance technician after earning an Associate Degree in Industrial Technology and obtaining his North Carolina Electrical Contractor License. Throughout his career, he has worked alongside every major trade, built custom homes, completed major renovations, and helped thousands of homeowners solve electrical and HVAC challenges. As a licensed electrical contractor, licensed general contractor, and business owner, Travis is passionate about educating homeowners on electrical safety, HVAC systems, and home improvement. He regularly shares expert insights and serves as a trusted resource for homeowners, journalists, and media outlets.