I've been in the HVAC industry for 35 years and have installed many types of systems. I really like the equipment GWIN has to offer and the versatility of the systems.
The DIY Mini Split Guide · Updated May 2026 · Reviewed by Licensed Techs
The Upgrade You Didn't Know Existed.
Most homeowners think DIY mini splits mean choosing between saving money and keeping your warranty. GWIN™ is the only brand that proved that's a lie — with a tech on every job, parts guaranteed for 10 years, and everything covered in year one.
4.9★ Google Rating
Real verified reviews
Licensed Tech Included
Not an upsell — it's in the price
$3K–$8K Saved
vs full professional install
10-Year Parts & Compressor
Ships free to your door
1-Year Bumper-to-Bumper
Everything covered, year one
615-538-7979
Mon–Sat · 9AM–5PM CST
What GWIN Actually Is
GWIN™ Assisted DIY — What It Actually Is
Most DIY mini splits still leave the hardest parts up to you — pressure testing, vacuuming the system, handling refrigerant, finding your own tech, or dealing with bulky pre-charged line sets. GWIN™ HVAC changes all of that. With Assisted DIY™, you never need special tools, never touch refrigerant, never run a vacuum pump, and never perform a pressure test. Our line sets with easy-connect flare-less fittings allow for a professional operating system with a professional look — no coiled mess, no guesswork. Just a straightforward self-install ductless system that goes in like a true DIY project, backed by professionals every step of the way. Whether you're cooling or heating a garage, basement, bedroom, sunroom, home addition, tiny home, or cabin — GWIN™ HVAC is the upgraded version of DIY ductless mini splits.
Perfect For
Industry Endorsed
Real Licensed Techs Already Trust This Model.
GWIN partners with experienced licensed HVAC techs across the country. Here's what they say about the equipment, the homeowners, and the model itself.
Licensed
HVAC techs only
100%
Tech success rate
35 yrs
Avg tech experience
5.0★
Tech-verified rating
We have never once failed to place a tech at a customer's door — including some of the most remote corners of the country. If we ever couldn't find someone local, we'd drive one out. We'd book a flight. We'd lose money before we'd lose you. That's not a policy. That's how seriously we take every single order.
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