R-410A vs R-32 Refrigerant Comparison

Why Are Refrigerants Changing?

The AIM Act (American Innovation and Manufacturing Act of 2020) mandates an 85% phase-down of HFC refrigerants by 2036. R-410A — the standard AC refrigerant since the early 2000s — has a Global Warming Potential (GWP) of 2,088, meaning 1 pound of leaked R-410A traps as much heat as 2,088 pounds of CO₂.

R-32 has a GWP of 675 — roughly one-third of R-410A — making it compliant with the new EPA regulations taking effect in 2025.

R-410A vs R-32: Head-to-Head

Efficiency: R-32 has a 5–10% higher coefficient of performance (COP) than R-410A, meaning it produces slightly more cooling per watt of electricity consumed.

Charge size: R-32 systems require approximately 30% less refrigerant by weight, which reduces manufacturing costs and makes the system lighter.

Safety: R-32 is classified A2L (mildly flammable) vs R-410A's A1 (non-flammable). In practice, the flammability risk is extremely low — R-32 only ignites above 1,220°F and is difficult to sustain combustion. Modern equipment includes safety sensors.

Servicing: R-410A systems cannot be retrofitted with R-32 — the refrigerants are not drop-in compatible. If your current system uses R-410A, it will continue to be serviceable for its full lifespan.

Which Brands Use R-32?

Daikin: All new residential and ductless lines (Entra, Oterra, Emura, Aurora, Polara) use R-32
Goodman: New residential lines transitioning to R-32 starting 2025–2026
Carrier/Bryant: Transitioning select models to R-454B (another low-GWP option)
Lennox: Using R-454B for residential, R-32 for commercial
Mitsubishi: R-32 for most new ductless models globally

Should You Buy R-410A or R-32 Right Now?

If replacing your system now: Choose R-32 if available in your equipment choice. It's the direction the industry is heading, and R-410A will become increasingly expensive to service as production is cut.

If your current R-410A system works fine: There is no need to replace it early. R-410A will remain available for service for decades, though prices may gradually increase. Plan to switch to R-32 (or R-454B) at your next full system replacement.

Property	R-410A	R-32
GWP (Global Warming Potential)	2,088	675
Safety Class	A1 (Non-flammable)	A2L (Mildly flammable)
Efficiency	Baseline	5–10% higher COP
Charge Required	Baseline	~30% less
AIM Act Compliant (2025+)	❌ Phase-down	✅ Compliant
Retrofit Compatible	—	❌ Not drop-in
Availability	Declining (40% cut by 2024)	Increasing

Frequently Asked Questions

Is R-32 refrigerant dangerous?

R-32 is classified A2L (mildly flammable) but poses minimal real-world risk. It requires temperatures above 1,220°F to ignite and is difficult to sustain combustion. All R-32 equipment includes leak detection safety sensors as required by code.

Can I switch my R-410A system to R-32?

No. R-32 and R-410A are not interchangeable. You cannot retrofit an existing R-410A system with R-32. The switch happens when you replace the entire outdoor unit (condenser) and, in most cases, the indoor coil.

Will R-410A be available for repairs?

Yes, for the foreseeable future. While production is being phased down, reclaimed and recycled R-410A will remain available for servicing existing systems. Prices may increase over time.

Is R-32 more efficient than R-410A?

Yes. R-32 has a 5–10% higher coefficient of performance (COP) and requires approximately 30% less refrigerant charge by weight, resulting in slightly lower operating costs and reduced environmental impact.