The EPA's Cheat Sheet on Automatic Leak Detection Requirements — Decoded for Facilities Leaders
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The EPA's Cheat Sheet on Automatic Leak Detection Requirements — Decoded for Facilities Leaders

  • Writer: Amrit Robbins
    Amrit Robbins
  • 17 hours ago
  • 3 min read

The EPA recently published a simple, 4-page fact sheet that every facilities leader managing commercial refrigeration should read — if you haven't already.


In January 2026, as part of its ongoing rollout of the AIM Act's Emissions Reduction and Reclamation (ER&R) rule, the EPA released a fact sheet specifically focused on Automatic Leak Detection (ALD) requirements for appliances containing HFCs and certain substitutes. Think of it as the agency's own cheat sheet — a concise breakdown of what the regulation actually requires, who it applies to, and by when.


I've linked the full fact sheet here. Below, I've decoded the most important parts for the facilities leaders and operators I talk to every day.



Does My Refrigeration System Need Automatic Leak Detection?


This is the first question operators ask me — and it has a clear answer. You are required to have an ALD system installed and in use if your equipment meets all three of the following criteria:


  1. Full charge size of 1,500 pounds or more

  2. Uses a refrigerant containing an HFC or substitute with a global warming potential above 53 (essentially all common commercial refrigerants qualify)

  3. Installed on or after January 1, 2017 — or any new equipment installed on or after January 1, 2026


If your system checks all three boxes, ALD is not optional.




What Are the Deadlines for Automatic Leak Detection (ALD)?


Here's where I see the most confusion in the field:


New equipment (installed January 1, 2026 or later): ALD must be installed and operational upon installation, or within 30 days.


Legacy equipment (installed between January 1, 2017 and December 31, 2025): ALD must be installed and operational by January 1, 2027.


That 2027 deadline is the one catching people off-guard. Many operators thought the January 1, 2026 enforcement date was the only deadline that mattered. It isn't. If you have legacy systems that qualify, you have less than a year to get compliant.




What Is the Difference Between Direct and Indirect ALD Systems?


The EPA recognizes two types of ALD systems, and operators can choose either — as long as the system meets the technical standards in the rule.


Direct ALD systems use fixed hardware sensors to continuously monitor refrigerant concentration in the air near the compressor, evaporator, condenser, and other high-risk areas.


Indirect ALD systems use predictive software to analyze real-time operating data — temperature, pressure, liquid levels — and compare it against historical trends to detect potential leaks.


One important nuance the EPA is explicit about: direct (point sensor) systems cannot adequately cover outdoor components like rooftop condensers or non-enclosed areas. If you're using a direct system, portions of your appliance outside an enclosed space still require manual leak inspections. Only a whole-system indirect solution — one that monitors 100% of the refrigerant circuit — can potentially replace the manual inspection requirement.




What Do I Do When My ALD System Triggers an Alert?


Installing the system is step one. Knowing what to do when it goes off is just as important — and just as regulated. When your ALD triggers an alert, you have two options under the rule:


  1. Calculate the leak rate within 30 days of the alert (or 120 days if an industrial process shutdown would be required). If the leak rate exceeds the applicable threshold, full leak repair requirements kick in.

  2. Preemptively repair the leak before adding any refrigerant to the appliance, then calculate the leak rate within the same window.


If your ALD system is only monitoring a portion of the appliance, the remainder is still subject to applicable manual leak inspection requirements.


What Records Do I Need to Keep for ALD Compliance?


This is the part that bites operators at audit time. Where ALD systems are required, you must maintain records for a minimum of three years — and the EPA specifies exactly what those records must cover.



The EPA doesn't care if your system caught the leak. If you can't show the documentation, you're in violation. Enforcement and documentation are two separate problems — and operators who solve only the first one often find out the hard way.


What Does All This Mean for My Facility?

The EPA published this fact sheet to remove ambiguity. The requirements aren't changing — they're just being made clearer. And for operators running qualifying commercial refrigeration systems, the clarity cuts both ways: there's less room to argue you didn't know, and less time to act than you might think.




If you're not sure whether your systems qualify, or you're trying to figure out whether your current ALD setup actually meets the technical thresholds in the rule, that's exactly the kind of question we help operators answer. We've worked through these compliance questions with some of the largest grocery and cold storage operators in the country.




Sources: EPA AIM Act ER&R Fact Sheet (January 2026, 40 CFR Part 84) · 40 CFR 84.108 · EPA.gov full fact sheet


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