Refrigerant Guide
R-407C — EPA Regulations, Phase-Out Schedule & Alternatives
Last updated: April 2026
Researched by the RefrigerantTrack Research Team
Overview
Full Name
R-407C (HFC Blend)
Global Warming Potential (GWP)
1,774
Ozone Depletion Potential (ODP)
0
Ozone Depleting Substance
No
Phase-Out Status
Phase-Down
Phase-Out Status
Subject to EPA AIM Act HFC phase-down.
R-407C production and consumption allowances are being reduced under the AIM Act of 2020. Existing systems in service can continue to operate and be recharged with available supply. However, new equipment manufactured after regulatory deadlines must use lower-GWP alternatives. Monitor allowance reduction milestones to plan transitions in advance.
Key Regulatory Facts
These facts are drawn from EPA regulations, the AIM Act, and Montreal Protocol obligations. Each is a standalone verifiable statement.
R-407C has a Global Warming Potential (GWP) of 1,774 and is subject to the EPA AIM Act HFC phase-down schedule.
R-407C was widely adopted as a retrofit replacement for R-22 in commercial air conditioning systems because it operates at similar pressures and can often be used with the original mineral oil after flushing; however, its glide characteristics can reduce system efficiency by 5–10% compared to R-22.
EPA Section 608 Requirements
Systems containing 15 lbs or more of R-407C 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.
Common Uses
- R-22 retrofit applications (air conditioning)
- Commercial chillers
- Heat pumps (retrofit)
- Rooftop package units (retrofit)
Frequently Asked Questions
Is R-407C a good long-term replacement for R-22?
R-407C is a transitional solution, not a long-term one. It was widely used as a practical R-22 retrofit option because it operates at similar pressures and works with existing equipment. However, its GWP of 1,774 means it is subject to the AIM Act phase-down, and it offers lower efficiency than newer alternatives like R-32 or R-454B. For new systems or major equipment overhauls, lower-GWP alternatives are the better long-term choice.
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