In May 2026, the EPA finalized a reconsideration of its 2023 Technology Transitions Rule and gave cold storage operators additional time to meet stricter refrigerant requirements. The deadline for new warehouse systems to meet a 150 or 300 global warming potential (GWP) limit moved to 2032, with an interim 700-GWP ceiling taking effect in July 2026.
On paper, that sounds like relief. In practice, it gives operators more flexibility to make capital decisions about new refrigeration systems. One option is to build around refrigerants that meet the interim limit. Another is to move directly to ammonia, CO2, or qualifying low-GWP alternatives that can satisfy the stricter requirements.
Both approaches have potential advantages, and neither is without cost. The choice operators make now can shape their energy bills, maintenance requirements, insurance considerations, and long-term facility value for years to come.
Two Compliance Paths Opened Up Overnight
Under the original 2023 rule, new cold storage warehouse systems installed beginning January 1, 2026, generally faced a 150 or 300 GWP limit, depending on refrigerant charge size and system configuration. That pushed new projects toward natural refrigerants and other low-GWP alternatives.
The May 2026 reconsideration changed the timeline. New cold storage warehouse systems are subject to an interim 700-GWP limit beginning July 27, 2026. The stricter 150 or 300 limits take effect January 1, 2032, for new systems covered by those requirements.
The interim limit expands the available options compared with the original requirements, although it doesn’t permit every refrigerant commonly used in existing facilities. For example, R-448A and R-449A have GWP values above 700 and therefore don’t meet the interim ceiling. The longer transition period gives operators more time to evaluate equipment availability, installation requirements, and long-term operating costs.
Cold storage networks like CORE X Partners understand the importance of reliable temperature-controlled infrastructure when supporting customers with long-term storage and distribution needs. For operators planning new facilities, the best approach depends less on the deadline itself and more on how long they expect the equipment to remain in service.
The Interim Path Looks Cheaper Until You Price the Second Project
An interim-compliant system may allow operators to use equipment and service practices that are more familiar to their contractors. Depending on the refrigerant and system design, that familiarity can help reduce installation complexity and upfront costs. For facilities facing tight capital budgets, those advantages may be meaningful.
However, the initial installation cost isn’t the only number worth evaluating. A system installed in 2027 may remain operational well beyond 2032, when stricter GWP limits apply to new systems. That doesn’t automatically mean the existing system must be converted or replaced in 2032. The EPA’s technology transition requirements generally distinguish between installing new systems and continuing to operate existing equipment, subject to applicable rules.
Still, operators should consider the availability and future cost of refrigerant, replacement components, service expertise, and potential equipment upgrades over the system’s useful life. A lower initial investment may be attractive, but it should be compared against realistic long-term maintenance and operating expenses.
None of those future costs necessarily makes the interim approach a poor decision. They simply belong in the financial analysis before construction begins.
The Leapfrog Path Costs More to Build and Less to Own
A natural-refrigerant build can require a different approach to system design. Ammonia systems may need specialized safety measures, ventilation, and trained personnel. Transcritical CO2 systems operate at relatively high pressures, requiring appropriately rated components and technicians familiar with the technology.
Certain low-GWP refrigerant blends also introduce additional design considerations. Refrigerants classified as A2L, for example, have lower flammability and may require specific safety measures under applicable mechanical codes and standards, including ASHRAE Standard 15. These requirements can increase installation complexity and affect upfront project costs.
Operating expenses may help offset some of that investment. Refrigeration represents a substantial share of energy consumption in many cold storage facilities, making system efficiency an important factor in long-term costs. Well-designed ammonia and CO2 systems can deliver strong energy performance, but savings aren’t automatic. Efficiency depends on factors including ambient temperatures, refrigeration load, system configuration, controls, and maintenance.
Over a 15-year operating period, even relatively modest differences in energy consumption can have a meaningful financial impact. There is also the question of what the asset may be worth to a future buyer. A warehouse equipped with modern, lower-GWP refrigeration may appeal to buyers concerned about long-term regulatory exposure, operating costs, and sustainability goals.
An interim-compliant warehouse can still be a valuable asset, but prospective buyers may want additional information about equipment age, refrigerant availability, and future capital requirements.
When Each Path Actually Wins
The interim path may make sense when the facility has a defined operating horizon, capital availability is limited, or an interim-compliant system provides an attractive balance of cost and performance. A leased building with eight years remaining, a property being prepared for sale, or a seasonal operation may place greater weight on upfront investment than a facility intended to operate for several decades.
The longer-term approach may be more attractive when the building is a long-hold asset, refrigeration represents a dominant operating expense, or customers are increasingly interested in reducing direct greenhouse gas emissions. It can also make sense when local contractors have experience installing and servicing ammonia or CO2 systems and the permitting environment supports the proposed design. Those factors vary by jurisdiction and should be confirmed with the appropriate authority before the design is finalized.
The one answer that doesn’t work in 2026 is choosing by inertia. The revised rule provides additional time and flexibility, but it doesn’t eliminate the need to plan. Price both approaches, evaluate long-term operating costs, and account for potential maintenance and replacement needs. The right refrigeration investment should support the facility’s intended operating life, financial goals, and customer requirements.
