EPA 608 Leak-Rate Calculator

Plan repairs faster with a graphical gauge that maps your calculated refrigerant leak rate to EPA’s 10/20/30 percent trigger bands.

EPA Program

Determines regulatory trigger and response window.

Calculation Method

Keep consistent per facility (EPA requirement).

Input your system data

Set up your appliance profile and leak-rate method.

Appliance category

Select the trigger band that applies to this equipment.

Full charge (lb)

Documented full refrigerant capacity at normal operating conditions.

Method-specific inputs

Lbs added (this event)

Record pounds added for this service event.

Days since previous addition

Annualizing uses the smaller of this value or 365 days.

Annualizing formula: lbs added × 365 ÷ days since the last addition.

Leak-rate snapshot

Compare your calculated leak rate to EPA triggers with a visual fill gauge.

Leak rate

20.3%

Trigger exceeded

0%22%

10%

Colored fill shows your leak rate as a fraction of the scale. Markers indicate EPA triggers (10/20/30%). The diamond marks the trigger that applies to the selected category.

Applicable trigger

10%

Comfort Cooling, Refrig. Transport, Other

Required action

Repair + Verify

Repair required within 30 days (or 120 days if process shutdown) plus verification testing (40 CFR §82.157).

Purge Exclusion: Purged refrigerant destroyed at ≥98% efficiency does not count toward the annual leak-rate calculation (keep records). § 82.157(k); § 84.106(k).

Quick references

Disclaimer: This tool summarizes federal rules as of Sep 2025 for convenience only. Consult the eCFR links above for controlling text.