If you’re like me, you love a good DIY project—especially one that can save you hundreds (or even thousands) on installation. But when it comes to HVAC, things get a little… trickier. After all, this isn’t hanging a light fixture or patching drywall.
So, can you install a horizontal R-32 AC system like the Goodman GPCH33631 on your own?
Let’s break it down the smart way.
The Appeal of DIY: Why We Try
We all know labor is expensive—and HVAC technicians are no exception. In fact, according to HomeAdvisor, a typical professional installation for a central air system can run between $3,800 and $7,500.
So it's no wonder more homeowners are researching DIY-friendly options. If you're handy, comfortable with tools, and following code, you can take on certain parts of the job.
But should you? Let’s look closer.
What You Can Do Yourself
For horizontal units like the GPCH33631, which are often installed in crawl spaces or attics, here are a few DIY-friendly prep steps:
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Site prep: Clearing space, installing pads, and ensuring airflow around the unit
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Ductwork modifications: If you're already experienced with HVAC ducts and sealing
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Condensate drainage setup: Installing or routing drain lines away from the foundation
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Wiring the thermostat: Especially if using a WiFi-enabled model like the Ecobee Enhanced
These parts aren’t too different from other home systems—and many handy homeowners can do them safely.
What to Leave to the Pros
Here’s where things get serious. The following steps involve refrigerants, pressure systems, and legal certifications:
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R-32 Refrigerant Handling: Even though R-32 is more efficient and has a lower GWP than R-410A, it is mildly flammable (A2L classification). That means only EPA 608-certified professionals should handle it.
(EPA guidelines on refrigerants) -
Line set brazing or connection: Improper seals can lead to refrigerant leaks, efficiency loss, and fire risk.
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Charging and evacuation: Ensuring the correct vacuum levels and refrigerant charge requires gauges and pumps the average homeowner doesn’t have.
Even Daikin, one of the world’s largest HVAC manufacturers and an R-32 pioneer, states clearly that professional installation is required to ensure safety and warranty protection.
The Legal Side: Permits and Codes
Local jurisdictions usually require HVAC permits and inspections—even for DIYers. And if something goes wrong and you didn’t pull a permit? Your homeowner’s insurance may not cover the damage.
That’s why I always recommend checking with your city or county building department before touching any mechanical system.
A Smarter Option: DIY-Ready Mini Splits
If you’re still itching to install something yourself, here’s my personal pick: DIY ductless mini split systems. They’re pre-charged with R-32, come with quick-connect lines, and are designed for homeowner installation.
Browse options like these in the Factory Furnace Outlet DIY Mini Split Collection. They’re perfect for garages, guest rooms, and additions—and the install can usually be done in a weekend.
So, Can You DIY the Goodman Horizontal AC?
Here’s the truth, smart shopper to smart shopper:
You can prep the site, run electrical, and install smart thermostats.
You shouldn’t handle refrigerants or pressurized lines without certification.
If you’re up for a hybrid approach, hire a pro for refrigerant handling and handle the rest. That gives you the best of both worlds—savings, safety, and peace of mind.
Final Thoughts from Samantha
R-32 horizontal AC systems like the Goodman GPCH33631 are smart, efficient, and forward-thinking. But installation isn’t the place to cut corners.
So be smart. Do what you can—and know when to bring in backup.
Want to learn more about R-32 refrigerant or browse DIY alternatives? Start with our trusted collection at The Furnace Outlet and let efficiency meet peace of mind.
IN the next topic I will cover about: Understanding A2L Refrigerants: Is R-32 Safe for Your Family?
