📋 EPA Leak Rate Thresholds Changed in 2026: The New 10/20/30 Rules Most Charts Get Wrong

If you learned refrigerant compliance under the old Section 608 rules, everything you memorized about the 50-pound threshold changed on January 1, 2026. The EPA's AIM Act regulations (40 CFR Part 84, Subpart C) pulled the leak-repair threshold all the way down to 15 pounds of full charge — and a surprising amount of the reference material floating around the internet, including several popular leak-rate calculators, still shows the old numbers.

This article lays out the current rules as written in the regulation itself: who is covered, the exact trigger rates, and the deadlines that follow a failed leak test.

What Changed on January 1, 2026?

The applicability threshold dropped from 50 pounds to 15 pounds of full charge, for appliances containing an HFC refrigerant or substitute with a global warming potential greater than 53. That covers the refrigerants doing most of the work in the field today — R-410A, R-404A, R-134a, R-407C, R-448A, R-449A and friends.

The practical effect is enormous: common 5- to 10-ton rooftop units, larger split systems, and mid-size refrigeration racks that never triggered federal leak-repair requirements before are now squarely inside the program. If you maintain equipment in that range, leak-rate math is now part of your job.

The New Trigger Rates: 10 / 20 / 30

Under 40 CFR 84.106(c)(2), a leak inspection-and-repair obligation triggers when the annualized leak rate exceeds:

• ▸ 10% for comfort cooling appliances, refrigerated transport, and other refrigerant-containing appliances — this is the tier your rooftop units and split systems fall into.
• ▸ 20% for commercial refrigeration appliances — walk-ins, reach-ins, supermarket racks, ice machines.
• ▸ 30% for industrial process refrigeration (IPR).

The Deadlines After a Failed Test

When an appliance over 15 pounds exceeds its trigger rate, the owner or operator must locate and repair the leaks within 30 days of the refrigerant addition that revealed the leak — extended to 120 days only when an industrial process shutdown is required.

There is also a chronic-leaker provision: appliances of 15 pounds or more that leak 125% or more of their full charge in a calendar year must be reported to the EPA by March 1 of the following year. That is the kind of paperwork obligation that sneaks up on portfolios without good refrigerant logs.

Who Is Exempt?

The rule carves out residential and light-commercial air conditioning and heat pump systems from the leak-repair provisions. The line between a covered comfort-cooling appliance and an exempt light-commercial system is not always obvious in the field, so the conservative move — and the one we take in our own software — is to track the leak rate on everything at 15 pounds or more and note where the exemption may apply. Over-tracking costs you a log entry; under-tracking can cost a violation.

How the Annualized Math Works

The method the EPA accepts is the annualizing formula: leak rate = (pounds added ÷ full charge) × (365 ÷ days since the last addition) × 100.

Worked example: a 50-pound commercial refrigeration rack gets 5 pounds added, 180 days after the last charge. That is (5 ÷ 50) × (365 ÷ 180) × 100 = 20.3% annualized. Under the old rules of thumb that number sailed by; under 84.106 it exceeds the 20% commercial trigger and starts the 30-day repair clock. The same 20.3% on an IPR system would be fine — and on a rooftop unit it would be double the 10% trigger.

Don't Trust Old Charts

Search results are still full of 608-era tables showing 15%, 20%, 35%, or a flat 50-pound threshold. Before you rely on any chart or calculator, check it against the regulation text — the current numbers are in 40 CFR 84.106, and the EPA publishes a plain-language fact sheet on the leak-repair provisions.

Our free EPA leak-rate calculator was rebuilt against the 2026 rule and applies the 10/20/30 tiers automatically, including the 15-pound applicability gate. Equipment Tracker Pro also runs the same math on every refrigerant log entry in the app and flags threshold exceedances the moment you record a charge, so violations surface on the roof — not in an audit.

What is the EPA 15 lb refrigerant rule?

As of January 1, 2026, EPA leak-repair requirements under the AIM Act (40 CFR 84.106) apply to appliances with a full charge of 15 or more pounds of an HFC refrigerant with a GWP above 53 — down from the old 50-pound threshold.

What are the EPA leak rate thresholds in 2026?

10% for comfort cooling and other appliances, 20% for commercial refrigeration, and 30% for industrial process refrigeration, applied to appliances with 15+ pounds of charge.

How is the annualized leak rate calculated?

Leak rate = (pounds added ÷ full charge) × (365 ÷ days since last addition) × 100. Adding 5 lbs to a 50 lb system 180 days after the last charge is a 20.3% annualized rate.

How long do I have to repair a leak that exceeds the threshold?

Leaks must be located and repaired within 30 days of the refrigerant addition — or 120 days if repairs require an industrial process shutdown.

Are residential AC systems exempt from the 2026 leak rule?

Residential and light-commercial air conditioning and heat pump systems are carved out of the leak-repair provisions. When classification is unclear, the safe practice is to track leak rates anyway and note that the exemption may apply.

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-world property handoff challenges — including the absolute nightmare of losing years of maintenance histories and having to reprint physical asset tags.