Confirm the equipment and refrigerant
R-32 and R-454B are A2L refrigerants. EPA’s SNAP listings for residential and light-commercial AC and heat pumps specify acceptable end uses and use conditions. Consult those conditions and manufacturer instructions for the particular equipment; a listing does not authorize every installation or retrofit.
Use the equipment identification, refrigerant label and safety data to establish what is present. Follow qualified training and the equipment-specific service procedure. A general article or completed checklist does not establish that a recovery machine, detector or proposed hot-work procedure is suitable.
A2L does not establish Part 84 leak-repair coverage
Section 82.157 generally covers appliances with a full charge of at least 50 pounds of an ODS refrigerant or a blend containing ODS. Section 84.106 applies from January 1, 2026 to qualifying appliances with a full charge of at least 15 pounds of refrigerant containing either a regulated substance, or a substitute for a regulated substance whose GWP is greater than 53. The GWP cutoff belongs to the substitute branch. Part 84 excludes solely-ODS appliances and residential/light-commercial AC and heat pumps. Refrigerant identity or charge alone does not establish coverage.
Consequently, an R-32 or R-454B residential/light-commercial AC or heat-pump appliance is excluded from §84.106 leak repair; its charge or A2L classification does not remove that exclusion. Other covered appliance categories can have leak-repair obligations. Applicable safety, recovery, certification and other duties remain separate.
Use records to support the review
FieldPad stores refrigerant, appliance and service facts. Review their accuracy and the applicable requirement before relying on a determination. The app’s safety prompts are documentation aids, not a universal federal A2L checklist or a certificate of compliance.
For installation restrictions and transition dates, consult the current rule and equipment-specific requirements. A leak-repair applicability result is not installation approval.
