R-32 vs. R-410A: What Homeowners Need to Know Before Upgrading to a 4-Ton System

Hey Folks — Mike Again 👋

So, you're in the market for a new 4-ton air conditioner — maybe the old one gave out, or maybe you’re finally fed up with that energy-guzzling dinosaur out back. Either way, you’re gonna come across a new acronym: R-32.

Now, you might be used to hearing R-410A, and maybe you’re wondering:
“What the heck is R-32, and should I even care?”

Short answer: yes, you should. Especially if you’re thinking long-term.

Let’s walk through R-32 vs. R-410A — side by side — and I’ll explain what the switch means, why manufacturers are ditching R-410A, and how it affects your next 4-ton install.

 

Why the Switch from R-410A?

First off — the industry didn’t just wake up and decide to use a new refrigerant for fun. R-410A is being phased down because of its global warming potential (GWP).

• R-410A has a GWP of 2,088

• R-32 has a GWP of 675 (about 70% lower)

The EPA, under the AIM Act, is pushing HVAC manufacturers to move toward lower-GWP refrigerants. R-32 is a front-runner, and most major brands — like Goodman, Carrier, and LG — are now rolling out R-32 units nationwide.

More info on the GWP push here: EPA’s refrigerant phase-down overview.

 

Efficiency: R-32 Is the Better Performer

Now let’s talk real-world cooling. I’ve worked on both systems, and here’s the deal:

• R-32 absorbs and releases heat better, so systems can cool faster

• You get higher SEER2 ratings with smaller compressors

• R-32 systems often use 20–30% less refrigerant by volume than R-410A

That means you’ll probably see lower utility bills with an R-32 4-ton unit — provided the install is done right.

Carrier did a full side-by-side test of R-32 vs. R-410A performance — read their results right here.

 

Flammability: Is R-32 Safe?

R-32 is rated A2L, which means:

• A: Non-toxic

• 2L: Mildly flammable

Now before you panic, let me say this: it’s not like propane. You won’t light the house on fire just by turning on your AC.

That said, it does require:

• Proper venting in enclosed spaces

• Leak detectors and sensors (in some jurisdictions)

• Installer training to meet codes

That’s why you can’t just swap R-32 into an R-410A system — the components and safety systems are different.

Still nervous? Here's a straight-shooting safety breakdown from ASHRAE.

 

Cost: Upfront vs. Long-Term

Let’s look at the money:

Upfront:

• R-32 units might cost slightly more upfront, especially the newer 4-ton models with higher SEER2 ratings

• If your current system uses R-410A, you’ll need a full system replacement — you can’t mix refrigerants

Long-term:

• R-32 refrigerant is cheaper per pound and requires less volume

• The system will likely be more efficient, saving you on power bills

• Future refrigerant availability will favor R-32, not R-410A

Need help comparing your savings? Try this HVAC Energy Calculator from the Energy Star— it’s free and legit.

 

Availability: The R-32 Surge Has Started

Back in 2022, R-32 systems were pretty rare. Now? Most major manufacturers are either:

• Already shipping R-32 units

• Or planning full transitions by 2026

Here’s what I’ve seen firsthand:

• Daikin, Goodman, and LG have multiple 4-ton R-32 systems in stock

• Parts and line sets are starting to standardize around R-32-compatible components

• Distributors are phasing out R-410A in preparation for 2025 compliance milestones

For proof, check out HVAC Insider’s refrigerant forecast.

 

Can You Still Buy R-410A Systems?

Yes — for now. But it’s a short runway.

Most manufacturers are already sunsetting 410A models. And as supply tightens, R-410A refrigerant prices will rise. So even if you get a “deal” now, you might end up paying more in the long run to maintain it.

And if your 4-ton system needs a major repair down the road? Good luck finding compatible parts and refrigerant by 2027.

 

Mike’s Tips for Picking the Right 4-Ton System 💡

Here’s what I tell homeowners at the kitchen table:

✅ Choose R-32 if you're buying new — it’s efficient, compliant, and future-proof
✅ Don’t retrofit your 410A system to R-32 — it’s not safe or allowed
✅ Verify local codes — R-32 is approved nationwide, but some cities require extra steps
✅ Look for a system with at least 14.5–15.2 SEER2 — that’s the new sweet spot
✅ Choose an installer who knows R-32 — especially with flare torque, charge levels, and electrical safety

Want a dependable R-32 system? I personally like the lineup from The Furnace Outlet’s 4-ton R-32 collection — good specs, fast shipping, and no fluff.

 

Final Take: Upgrade Smart, Not Just Fast 💬

Here’s my take: if you’re spending thousands on a new AC, you deserve to know what you’re getting. R-32 is the direction the HVAC world is headed, and when done right, it gives you:

• Better performance

• Lower environmental impact

• Fewer headaches in the long run

Yes, it’s a little different. Yes, it takes some learning. But if you’re upgrading to a 4-ton AC, you might as well go with the refrigerant that’ll still be around in ten years — not one that’s on its way out.

And hey — if you’ve got questions about line sets, permits, or installation? I’ve got guides for those too.

Need to know how to inspect your 4-ton R-32 AC? Visit my guide: The Seasonal Checklist for Homeowners.

Until then — stay cool, stay sharp,
—Mike, your cool HVAC guide 🧊