Refrigerant Guide
R-32 — EPA Regulations, Phase-Out Schedule & Alternatives
Last updated: April 2026
Researched by the RefrigerantTrack Research Team
Overview
Full Name
R-32 (Difluoromethane)
Chemical Formula
CH₂F₂
Global Warming Potential (GWP)
675
Ozone Depletion Potential (ODP)
0
Ozone Depleting Substance
No
Phase-Out Status
Active
Phase-Out Status
Currently active — no phase-out date set.
R-32 is not subject to an immediate phase-out or phase-down. It is approved for use in new equipment and is considered a lower-GWP option relative to the refrigerants it replaces. EPA Section 608 leak rate requirements still apply to all systems with a charge at or above the applicable threshold.
Key Regulatory Facts
These facts are drawn from EPA regulations, the AIM Act, and Montreal Protocol obligations. Each is a standalone verifiable statement.
R-32 has a Global Warming Potential (GWP) of 675 — approximately one-third the GWP of R-410A (2,088) — making it a significantly lower-climate-impact refrigerant for air conditioning.
R-32 is classified as A2L (mildly flammable) by ASHRAE, with a lower flammability limit (LFL) of 14.4% by volume in air; it requires A2L-rated equipment, installation practices, and technician training per ASHRAE Standard 15-2022.
EPA Section 608 Requirements
Systems containing 15 lbs or more of R-32 are subject to the following EPA requirements.
| Requirement | Value |
|---|---|
| Appliance charge threshold (leak tracking required at or above) | 15 lbs |
| Max annual leak rate — commercial refrigeration | 15% |
| Max annual leak rate — comfort cooling | 30% |
Thresholds reflect the January 1, 2026, EPA Section 608 rule change reducing the appliance charge threshold from 50 lbs to 15 lbs.
Alternatives to R-32
The following refrigerants are recognized EPA SNAP alternatives or successor refrigerants for R-32 applications. Always consult a certified HVAC technician before switching refrigerants.
Common Uses
- Mini-split and multi-split air conditioning systems
- Light commercial air conditioning (new equipment)
- Heat pumps (new equipment)
- Component refrigerant in blends such as R-410A and R-407C
Frequently Asked Questions
Is R-32 safe to use in commercial buildings?
R-32 is classified A2L — mildly flammable — by ASHRAE. It requires equipment rated and listed for A2L refrigerants, proper ventilation in equipment rooms, and technicians trained in A2L handling per ASHRAE Standard 15-2022. It is not the same risk level as propane or ammonia. Millions of R-32 units are in operation globally, particularly in Asia and Europe, with a strong safety record when installed and serviced correctly.
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