EPA Subpart C Leak Rate Calculator
Free tool to calculate refrigerant leak rates under the new EPA 40 CFR Part 84 Subpart C regulations (effective January 1, 2026). Determine if your equipment meets compliance thresholds for commercial refrigeration (20%), industrial process refrigeration (30%), or comfort cooling (10%).
Check equipment nameplate or manufacturer specifications
Enter your equipment details to calculate leak rate
About This Calculator
This free leak rate calculator helps HVAC professionals, facility managers, and refrigeration technicians determine if their equipment complies with EPA 40 CFR Part 84 Subpart C regulations. Starting January 1, 2026, any facility with equipment containing 15 pounds or more of refrigerant with a Global Warming Potential (GWP) greater than 53 must calculate leak rates every time refrigerant is added.
Understanding the New Thresholds
The EPA has established different leak rate thresholds based on equipment type:
- Commercial Refrigeration: 20% annual leak rate (supermarkets, convenience stores, restaurants)
- Industrial Process Refrigeration: 30% annual leak rate (manufacturing facilities, chemical plants)
- Comfort Cooling, Transport, and Other: 10% annual leak rate (office buildings, warehouses, refrigerated trucks)
When to Calculate
You must calculate the leak rate every time refrigerant is added to an appliance, with only three exceptions:
- Immediately following a system retrofit
- Installation of a new refrigerant-containing appliance
- Seasonal variance adjustments
What Refrigerants Are Covered?
This calculator applies to HFC refrigerants with a GWP greater than 53, including:
- R-134a (GWP 1,430) - Common in automotive AC and commercial refrigeration
- R-404A (GWP 3,922) - Common in supermarket refrigeration and cold storage
- R-410A (GWP 2,088) - Common in residential and commercial air conditioning
- R-407C (GWP 1,774) - Common in commercial HVAC systems
- R-448A (GWP 1,386) - Common retrofit replacement for R-404A
- R-449A (GWP 1,396) - Common retrofit replacement for R-404A
Want to Learn More?
Read our comprehensive guide on EPA Subpart C leak rate calculations, including detailed examples, compliance requirements, and recordkeeping obligations.
Read the Complete GuideAutomated Compliance Tracking
While this calculator helps you determine your current leak rate, managing ongoing compliance across multiple locations and equipment types requires automated tracking. RefriTrak automatically calculates leak rates every time refrigerant is added, tracks required inspections, generates EPA-compliant reports, and maintains the required 3-year recordkeeping—keeping you audit-ready 24/7.
Automate Your Compliance
Stop calculating leak rates manually. RefriTrak automatically tracks every refrigerant addition, calculates compliance, schedules inspections, and generates reports—so you never miss a deadline.