On 1 January 2026 the refrigerant leak-repair threshold for commercial refrigeration dropped from 50 pounds to 15 pounds. A great many walk-in freezer systems sit between those two numbers, so they went from unregulated to regulated overnight. If that is you, you now owe an annual leak inspection, a leak-rate calculation every time refrigerant is added, and a repair within 30 days if the rate exceeds 20%. Miss that and the rule requires a retrofit or retirement plan.
What changed, precisely
The Emissions Reduction and Reclamation rule, made under the AIM Act and published in October 2024, took effect on 1 January 2026. It extends leak management to HFC refrigerants — the gases in nearly every walk-in installed in the last fifteen years — and it does so at a much lower charge size than the old ozone-depleting-substance rules ever did.
| Old position | From 1 Jan 2026 | |
|---|---|---|
| Charge size where the rules bite | 50 lb | 15 lb |
| Leak rate threshold, commercial refrigeration | 20% | 20% |
| Leak-rate calculation | Not required on HFCs | Every time refrigerant is added |
| Leak inspections, 15–499 lb | None | Annual |
| Repair clock once exceeded | — | 30 days |
| If not repaired | — | Retrofit or retirement plan within 30 days, implemented within one year |
Does this apply to your box?
Two questions answer it. What refrigerant is in it, and how many pounds does it hold? Most operators cannot answer either, which is the honest reason this rule is going to catch people. The charge size is usually on the condensing unit data plate. As a rough guide, a single medium-temperature cooler often sits under 15 pounds; a walk-in freezer with a remote condensing unit frequently sits between 15 and 40, squarely inside the new rules.
What compliance looks like in practice
- Know your numbers. Refrigerant type and full charge, recorded per unit.
- An annual leak inspection for systems from 15 to 499 pounds.
- A leak-rate calculation every time gas goes in. Not an estimate — a calculation, recorded.
- Repair within 30 days of exceeding 20%, with initial and follow-up verification tests.
- Keep the records. The documentation is the compliance; a repair nobody wrote down did not happen as far as the rule is concerned.
The practical consequence most people miss
“Just top it off” is finished as a strategy. It was always poor practice — an overcharge causes floodback and kills compressors — but it is now a compliance event that starts a clock. A contractor who adds refrigerant to your system without calculating and recording the leak rate is leaving you exposed, not doing you a favour.
The second consequence is that a chronically leaking system can now be forced out of service. If the leak is not repaired, the rule requires a retrofit or retirement plan within 30 days and implementation within a year. That turns a deferred repair into a capital decision with a deadline attached.
The separate rule that people confuse with this one
There is a second set of rules about which refrigerants may go into new equipment, and EPA relaxed those in a final rule effective 27 July 2026. Remote condensing units for walk-ins got an interim GWP limit of 1,400, which means R-448A and R-449A are lawful again for now, reverting to much tighter limits in 2032. Self-contained walk-in systems got no relief — units made from January 2025 must already be low-GWP, in practice R-290 or an A2L blend.
These are different rules with different dates and they are constantly mixed up. A lot of guidance published in 2024 and 2025 is now simply wrong.
What we do about it
Every visit we make produces a written record: what refrigerant, what charge, what was measured, and a leak-rate calculation whenever gas is added. Our compliance audit establishes the baseline for a box that has never had one. None of this is sold as an extra — the work generates the paperwork, so you may as well be handed it.
Questions we get asked
Does this apply to a single small walk-in cooler?
Only if it holds 15 pounds of refrigerant or more. Many single medium-temperature coolers do not. Freezers with remote condensing units very often do. The data plate on the condensing unit tells you, and we check it on the first visit.
Who is responsible — me or my contractor?
The equipment owner or operator carries the obligation. Your contractor does the work and produces the records, but the duty to hold them is yours. That is precisely why we hand the record over rather than filing it on our side.
What is a leak rate, in plain terms?
It is the amount of refrigerant added over a year expressed as a percentage of the system’s full charge. Add 6 pounds over a year to a system holding 25 and your leak rate is 24% — over the 20% threshold, and the 30-day repair clock has started.
My R-22 system is old. Does this catch it too?
R-22 has always had leak rules, at the 50 pound threshold. The bigger issue for R-22 is economic: production ended in 2020, and reclaimed gas now runs $80–$150 a pound installed. A 25 pound charge is a refrigerant bill of $2,000 to $3,750 before labour, which is usually the moment replacement makes more sense than repair.
Is this actually enforced?
The recordkeeping obligation exists whether or not anyone knocks on your door. The realistic exposure is not a surprise federal inspection — it is that a chronic leak now carries a legal requirement to retire the system, and that a buyer, landlord or insurer can ask for records you do not have.