After January 1, 2027, new supermarket refrigeration systems installed in the U.S. must use refrigerants with GWP ≤ 150. R-448A and R-449A — what most Tampa Bay racks have run since 2018 — both exceed that limit. This rewrites the next 18 months of grocery capex planning.
Section 103 of the EPA AIM (American Innovation and Manufacturing) Act final rule, published October 2023 and effective in stages through 2028, restricts the use of HFCs in specific end-use sectors. For "retail food refrigeration" — which includes supermarkets, c-stores, and specialty grocery — the rule sets a GWP limit of 150 for new equipment installed on or after January 1, 2027.
"New equipment" means systems where compressor, condenser, and evaporator are installed together as a new unit, plus retrofits where >50% of the refrigerant-bearing components are replaced. Service of existing systems with their current refrigerant is not restricted by §103.
Three families of refrigerant clear the 150 GWP threshold for retail food: R-454C (GWP 148, A2L mildly flammable, on most new distributed systems), R-455A (GWP 148, A2L, similar profile to 454C), and R-290 propane (GWP 3, A3 flammable, common on self-contained cases at small charge). CO2 (R-744, GWP 1) is also compliant but transcritical CO2 systems are outside our scope.
R-448A (GWP 1387) and R-449A (GWP 1397) — the dominant U.S. supermarket refrigerants since the 2020 R-404A retrofits — both exceed the 150 GWP threshold by an order of magnitude. They cannot be used in new equipment installed after January 1, 2027 in retail food refrigeration. R-407A (GWP 2107) and R-407F (GWP 1825) are also out. R-404A (GWP 3922) was already restricted under earlier AIM Act provisions.
Existing systems running R-448A or R-449A can continue to operate and be serviced with the same refrigerant indefinitely under §103. The service refrigerant exemption is critical — without it, every R-448A rack in U.S. grocery would need full retrofit by 2027, which is logistically impossible. Retrofit becomes mandatory only if >50% of refrigerant-bearing components are replaced.
Reclaimed (recovered and reprocessed) R-448A may continue to be used for service. New virgin R-448A production is allowed during the AIM Act phasedown but at progressively reduced allocation, which raises virgin pricing year over year.
For new builds: any supermarket refrigeration installed in 2026 should already be specified to GWP ≤ 150 unless the equipment is operational and commissioned before January 1, 2027. The risk of a 2026 install of R-448A equipment is that delivery slip pushes commissioning past the deadline and the system can't be charged.
For existing stores: a planned 2026 rack rebuild on R-448A is fine if commissioning lands before January 1, 2027. After that, rebuilds must be GWP-150-compliant — which usually means a full distributed-system architecture change, not just a refrigerant swap.
All major U.S. supermarket case manufacturers (Hussmann, Hill Phoenix, Anthony, Zero Zone, Kysor Warren) ship current product lines with R-454C and R-290 options. R-290 self-contained product is fully mainstream for cases up to ~500g charge per circuit. R-454C distributed systems are mainstream from 2024 forward.
Compressor compatibility: Copeland ZB scrolls, Bitzer 4F recips, and most Embraco and Tecumseh hermetic compressors have qualified versions for R-454C and R-290. Check OEM bulletins before assuming a given compressor model is on the approved list.
R-454C and R-290 are A2L and A3 refrigerants respectively — mildly to moderately flammable. The 2023 Florida Building Code references ASHRAE 15-2022 charge limits for these refrigerants in occupied spaces, and the 2024 Florida Mechanical Code has specific provisions for retail food applications. New install permits in 2026 onward in Hillsborough, Pinellas, and Pasco counties will require A2L/A3 compliance documentation as part of the mechanical permit package.
For chains with multi-year capex plans: every line item touching refrigeration after January 2027 should be specified to GWP-150 today. For stores with R-448A racks at end of useful life: plan replacement timing relative to the deadline — rebuild before commissioning cutoff or rebuild after with full new architecture. For service contracts: negotiate reclaimed R-448A pricing terms now, because virgin R-448A pricing will rise significantly through 2028.
January 1, 2027. New supermarket refrigeration systems installed on or after that date must use refrigerants with GWP ≤ 150. R-448A and R-449A both exceed this limit and cannot be used in new installs.
Yes. The §103 rule applies to new equipment, not to service of existing systems. Existing R-448A and R-449A racks can be serviced indefinitely with the same refrigerant. Retrofits triggering >50% component replacement must move to a compliant refrigerant.
R-454C (GWP 148), R-455A (GWP 148), R-290 propane (GWP 3), and CO2 (R-744, GWP 1). Most current Hussmann, Hill Phoenix, and Anthony product lines ship with R-454C or R-290 options.
Yes. Virgin R-448A allocation under the AIM Act phasedown reduces year over year through 2028 and beyond, which is already raising virgin prices. Reclaimed R-448A from recovery operations remains available and is the long-term service supply for existing systems.
Suncoast Cold Systems handles exactly this kind of commercial refrigeration issue across Tampa, St. Petersburg, Clearwater, Brandon, Riverview, Temple Terrace, and Wesley Chapel. 24/7 dispatch. Licensed Class A A/C Contractor (FL #CAC1824642), EPA 608 Universal, OSHA 30 Construction.
The §82.157 leak-rate math and documentation Florida operators need.
The two compliant low-GWP paths compared.
The architecture decision that drives 20 years of operating cost.