🧊 Automated EPA Section 608 Compliance: Instant Leak Rate Calculations

The EPA's AIM Act rule at 40 CFR 84.106 draws the line for commercial and industrial systems: since January 1, 2026, any unit holding 15 or more pounds of an HFC refrigerant with a GWP above 53 falls under the mandatory leak-repair program. The older Section 608 rules at 40 CFR Part 82 still govern the ozone-depleting refrigerants like R-22, where the line is 50 pounds. If that system's leak rate exceeds the statutory threshold—10% for comfort cooling, 20% for commercial refrigeration, or 30% for industrial process refrigeration (IPR)—the leak has to be located and repaired within 30 days of the refrigerant addition that revealed it, and that clock starts on the date of the charge, not the date someone gets around to filing paperwork.

The math is not complicated — pounds added divided by full charge, times 365 divided by the days since the last addition, times 100 (or use our free online leak-rate calculator). But in the field, on a rooftop or in a mechanical room with a full schedule, that calculation never gets done because there is no structured place to record it. Equipment Tracker Pro puts it directly inside the service log.

How the Refrigerant Log Works

When you create a new maintenance log entry in Equipment Tracker Pro, you will see a Refrigerant Log card below the service details. It is collapsed by default so it does not clutter routine service logs. Tap to expand it.

Enter the refrigerant type, the system's total charge in pounds (from the equipment nameplate — which you already have in the record), and the amount you added today. The app instantly calculates the annual leak rate as a percentage and displays a compliance badge: green if you are within EPA thresholds, red with a warning if the 10% comfort cooling, 20% commercial refrigeration, or 30% IPR threshold is exceeded on a system with 15 lbs or more of charge.

What Gets Stored

The refrigerant type, system charge, amount added, calculated leak rate, date of last charge, and compliance flag are all stored with the maintenance log entry. This creates a permanent, auditable record of every refrigerant addition — indexed to the specific piece of equipment, with a timestamp.

In the event of an EPA audit, your records are already organized. Each service log with a refrigerant entry shows exactly what was added, when, and whether the system was within compliance at the time of service.

Which Threshold Applies to Your Equipment?

The trigger rate depends on the appliance class — 10% for comfort cooling, 20% for commercial refrigeration, 30% for industrial process refrigeration, applied to systems of 15 lbs or more. For the full 2026 rules — what changed, the repair deadlines, the chronic-leaker report, and who is exempt — see our complete guide: EPA Leak Rate Thresholds Changed in 2026. If a comfort cooling system holds 100 lbs of R-410A and you add 12 lbs a year after the last charge, that annualizes to 12% — above the 10% threshold, which starts the 30-day repair clock. Add the same 12 lbs six months after the last charge and it annualizes to 24%.

R-22 and the Phase-Out

The refrigerant log is particularly important for R-22 systems, which are no longer manufactured in the United States. With R-22 supply shrinking and prices high, any significant leak on an R-22 system is both a compliance issue and a financial one. Documenting each addition creates the paper trail that supports the case for system replacement when the math stops making sense.

The refrigerant inventory report in Equipment Tracker Pro already flags R-22 systems for attention. The new service log integration connects that flag to actual service history — so you can see not just that a system uses R-22, but how much refrigerant it has consumed over its service life.

Which equipment is subject to mandatory EPA leak tracking?

It depends on what is in the system. An HFC system, such as R-410A or R-404A, is covered from 15 pounds of full charge under the 2026 AIM Act rule at 40 CFR 84.106. An ozone-depleting refrigerant such as R-22 stays under the Section 608 rules at 40 CFR Part 82, where the line is still 50 pounds. The trigger percentages are the same 10 / 20 / 30 either way.

What are the statutory leak rate thresholds for different equipment classes?

The mandatory leak rate thresholds are 10% for comfort cooling systems, 20% for commercial refrigeration systems, and 30% for industrial process refrigeration (IPR) systems.

What happens when a system's leak rate exceeds the EPA threshold?

If the calculated leak rate exceeds the threshold, the leak must be located and repaired within 30 days of the refrigerant addition that revealed it, with an initial verification test inside that same window and a follow-up verification test within 10 days of a successful initial test.

What data does the Equipment Tracker Pro Refrigerant Log calculate and store?

The app calculates the annual leak rate and stores the refrigerant type, total system charge, amount added today, calculated leak rate, date of last charge, and a compliance flag with the maintenance log.

Why is tracking refrigerant additions important for older R-22 systems?

R-22 has not been produced or imported in the US since 2020, so what is left costs real money. Documenting each addition builds the history that tells you when replacing the unit is cheaper than feeding it.

Jonathan Curtis

HVAC Technician & Founder · Equipment Tracker Pro

Jonathan Curtis is an HVAC technician and the founder of Equipment Tracker Pro. He built the app to solve real problems he encountered in the field — including the frustration of manually calculating refrigerant leak rates on commercial systems to ensure EPA compliance.