Technician recovering refrigerant beside commercial equipment

US Businesses: Allowances, Tech Transitions and 15% F Gas Phasedown

The AIM Act phasedown will cut HFC production and consumption to 15% of baseline by 2036, managed through an EPA allowance system that already restricts supply. For businesses running refrigerant-dependent equipment, this means rising servicing costs and shrinking access to virgin gas well before the later caps take effect. The single most urgent step is a refrigerant-asset audit that flags high-GWP equipment for early action, before scarcity sets the price.

TL;DR:

  • The allowance system restricts HFC supply to 15% of baseline by 2036, causing rising costs and supply scarcity for virgin refrigerants well before then.
  • Restrictions on new equipment and subsector-specific deadlines between 2025 and 2028 mean businesses must monitor and adapt to phasedown compliance dates rather than waiting until 2036.
  • Reclaimed refrigerant remains lawful for servicing existing systems, but it must meet strict quality standards and regional supply limits, making it a short-term workaround.
  • Legacy equipment and parts face risks of becoming unsellable after sell-through windows close, leading to potential inventory write-downs and longer lead times for replacements.
  • Companies should conduct refrigerant asset audits, classify risk, and align replacements with phasedown milestones to minimize costs and avoid stranded inventory.
Akita
Plan Your Commercial HVAC Upgrade
Akita provides commercial air conditioning installation, maintenance, diagnostics, and energy-efficient climate control solutions for businesses.

Table of Contents

AIM Act and allowance system: how the U.S. phasedown is implemented

The American Innovation and Manufacturing Act gives the EPA authority to phase down HFC production and consumption nationally through a capped allowance programme rather than an outright ban. Producers and importers must hold EPA-issued allowances covering every kilogram of HFC, calculated on a carbon dioxide equivalent basis, that they bring into commerce. No allowance, no legal supply.

The phasedown follows a fixed statutory schedule set against historic production and consumption baselines. According to the EPA’s phasedown guidance, the caps step down as follows:

  • 2020 to 2023: allowances capped at 90% of baseline.
  • 2024 to 2028: capped at 60% of baseline.
  • 2029 to 2033: capped at 30% of baseline.
  • 2034 to 2035: capped at 20% of baseline.
  • 2036 onward: capped at 15% of baseline, the final statutory target.

Each step reduces the total volume of HFCs legally allowed into the US market, regardless of demand. The EPA’s allocation rule fact sheet sets out how baselines were calculated from historic production and consumption data and how allowances are allocated to individual companies for each compliance period.

Allowances are tradeable. A producer or importer that holds more allowance than it needs can sell the surplus, and a company running short must buy on the secondary market or reduce output. This creates a genuine price signal: as the cap tightens, allowances become scarcer and more expensive, and that cost passes through to the refrigerant itself.

Allowance market flow and rising refrigerant costs

The legal architecture behind all this sits in the Federal Register rulemaking that formalised the allowance programme in 2021, covering baseline methodology, allocation procedures and the enforcement framework. Compliance obligations fall on producers and importers, not on end users, but the knock-on effects, price rises and tightening supply, reach every business that owns or services refrigerant-based equipment. Recordkeeping and third-party auditing requirements apply to allowance holders directly, with penalties for non-compliance built into the same rule.

Technology Transitions and product/subsector restrictions: what equipment and sectors are affected

The AIM Act phasedown works alongside a separate mechanism: Technology Transitions rules that restrict which refrigerants can be used in new equipment, sector by sector. Where the allowance programme limits total HFC volume, Technology Transitions targets specific applications and pushes manufacturers toward lower-GWP substances in new builds.

The Technology Transitions final rule fact sheet confirms that restrictions apply unevenly across subsectors, with compliance dates staggered between 2025 and 2028 depending on the equipment category. The subsectors affected include:

  • Residential and light commercial air conditioning and heat pumps.
  • Supermarket and other commercial refrigeration systems.
  • Aerosol propellants across a range of consumer and industrial products.
  • Foam blowing agents used in insulation and packaging.
  • Industrial process refrigeration and large chillers.

Each subsector has its own GWP threshold and its own compliance date, which means a facilities manager running both a rooftop AC unit and a walk-in cold room is managing two separate compliance clocks, not one.

It matters to separate manufacturing and import restrictions from servicing rules. Technology Transitions governs what new equipment can be manufactured, imported or sold once its compliance date passes. It does not require businesses to rip out existing legacy systems that were installed and running lawfully before that date. Servicing older R-410A or R-134a systems with reclaimed refrigerant remains lawful, subject to the sourcing and documentation standards discussed below.

Sell-through rules add another layer. Equipment manufactured before a subsector’s compliance date can typically still be sold and installed for a limited window afterward, which is where “sell-through” or installation date flexibility comes in. The EPA has also opened the door to adjusting these dates: a proposed reconsideration of Technology Transitions provisions from September 2025 signals that certain subsectors may get short extensions on sell-through or installation deadlines to avoid stranding inventory that manufacturers already built to the old specification. Contractors and procurement teams should track the relevant EPA docket rather than assume a fixed date applies indefinitely, because these reconsiderations can shift the practical deadline for a specific product category. Our guide to F-gas compliance covers the certification side of this in more depth for technicians working across multiple equipment types.

Market effects: supply, pricing and servicing legacy systems

Allowance scarcity does not wait for the final 2036 cap to bite. Prices for virgin HFCs have already moved because the allowance market prices in future scarcity today, not just the volume available this year. A contractor filling an R-410A system in 2026 is competing for allowance-backed supply that shrinks every few years on a fixed schedule, and sellers set prices accordingly.

The phasedown cuts allowable HFC volume to just 15% of the original baseline by 2036, a reduction steep enough that businesses relying on legacy high-GWP refrigerants should expect structurally higher servicing costs long before that final step arrives.

Market effects: supply, pricing and servicing legacy systems — overview diagram

Reclaimed and recycled refrigerant offers a lawful route around some of that scarcity. The EPA’s phasedown guidance confirms that reclaimed HFC can be used to service existing systems, and regulators actively encourage reclamation to reduce demand for virgin production. The catch is quality and traceability: reclaimed gas has to meet purity standards and carry documentation showing its provenance before a technician can legally use it in a client’s system. Supply of reclaimed refrigerant is also finite and regional, so relying on it as a long-term strategy means building relationships with reclaimers now, not when a system fails.

Stranded inventory is the other risk businesses tend to underestimate. As Technology Transitions restrictions phase in, spare parts and pre-charged components manufactured for outgoing refrigerants become harder to source. A business holding a warehouse of R-410A condensing units built before a compliance date can usually still sell or install them during the sell-through window, but once that window closes the units may become unsellable, forcing a write-down. The practical risks worth tracking:

  • Rising virgin refrigerant prices as allowance caps tighten on a fixed schedule.
  • Regional shortages of reclaimed gas meeting service-grade purity standards.
  • Warehoused pre-2025 components losing sale value once sell-through windows close.
  • Longer lead times for replacement parts as manufacturers wind down legacy product lines.

Compliance obligations for businesses and technicians

Compliance responsibilities split across two groups: the producers and importers who hold allowances, and the contractors and technicians who handle refrigerant in the field. Both carry real enforcement exposure.

Producers and importers face the heaviest paperwork. The EPA’s allocation rule fact sheet requires them to track every allowance transfer, report production and import volumes, and submit to third-party auditing. Falsifying records or exceeding an allocation triggers penalties under the same rule.

Contractors and facilities teams have a narrower but still meaningful set of obligations:

  1. Confirm technicians hold current EPA certification appropriate to the equipment type before they handle refrigerant on any job.
  2. Carry out leak checks on covered equipment at the intervals the applicable rule sets, and log the results.
  3. Label cylinders and systems correctly to show refrigerant type and, where reclaimed gas is used, its reclamation source.
  4. Recover refrigerant from decommissioned equipment rather than venting it, and route it to a certified reclaimer or destruction facility.
  5. Keep purchase and disposal records long enough to satisfy an EPA enforcement request if one arrives.

Pro Tip: Build a standing supplier agreement with a certified reclaimer now, before a failed system forces you into a spot-market scramble for reclaimed gas.

Internal controls matter as much as the individual obligations. A simple refrigerant inventory spreadsheet, updated after every service call, gives a business the audit trail it needs and flags which assets are running on refrigerants nearing restriction. Procurement clauses that require suppliers to confirm allowance-backed sourcing, rather than assuming compliance, close a gap that catches out businesses buying refrigerant through informal channels. Our piece on F-gas compliance for businesses walks through technician certification and leak-testing obligations in more detail.

Key regulatory dates and the phasedown timeline

Planning around the phasedown means working from a fixed calendar rather than reacting to price spikes as they happen. The allowance caps and Technology Transitions restrictions together set the milestones that should drive procurement and installation decisions over the next decade.

Period Allowance cap (% of baseline) Notable Technology Transitions activity
2020 to 2023 90% Baseline allocation period; early compliance planning begins
2024 to 2028 60% Subsector-specific sale and installation restrictions phase in
2029 to 2033 30% Sell-through windows for pre-restriction components largely closed
2034 to 2035 20% Reclaimed refrigerant becomes the dominant servicing source for legacy systems
2036 onward 15% Final statutory phasedown target reached

These figures come from the EPA’s phasedown schedule. The Technology Transitions compliance dates layered on top of this run between 2025 and 2028 depending on subsector, per the May 2026 fact sheet, with some installation date flexibilities still under proposed reconsideration for specific product categories. Any procurement decision made in 2026 should treat the 2024 to 2028 window as the period in which sell-through options close for pre-restriction inventory, not a distant future problem.

Practical preparation checklist for contractors, facilities managers and suppliers

Getting ahead of the phasedown is less about predicting exact prices and more about sequencing decisions before scarcity forces them. The following order works for most refrigerant-dependent operations, from a small commercial kitchen to a multi-site facilities portfolio.

  1. Inventory every refrigerant-dependent asset. List each system’s refrigerant type, GWP, charge size, age and criticality to operations, because you cannot prioritise what you have not catalogued.
  2. Classify by risk, not just age. A ten-year-old R-410A rooftop unit serving a server room is a higher priority than a newer unit on a low-traffic storage area, even though both use the same refrigerant.
  3. Decide reclaim, retrofit or replace for each asset. Reclaim keeps a working system running on documented reclaimed gas; retrofit swaps in a compatible lower-GWP refrigerant where the manufacturer supports it; replacement resets the compliance clock entirely.
  4. Sequence replacements around allowance cap dates, prioritising systems due for replacement anyway so the capital spend lines up with a period when parts and refrigerant are still relatively available.
  5. Write allowance-aware sourcing into supplier contracts, requiring proof that refrigerant supplied is backed by valid allowance or reclamation documentation.
  6. Add inventory and price-protection clauses to procurement agreements covering components at risk of stranding once sell-through windows close.
  7. Set a CAPEX trigger for early replacement where a system’s remaining service life overlaps with a period of steep cost increases, rather than waiting for a breakdown.

Pro Tip: When comparing a lower-GWP refrigerant against a higher-efficiency system using an older refrigerant, weigh lifetime emissions, not just the GWP number on the label. A more efficient unit can offset a higher-GWP refrigerant over its service life, particularly in high-runtime commercial applications.

Budgeting for this shift means separating two kinds of cost. Operating cost rises as virgin refrigerant and reclaimed gas both get more expensive, which argues for locking in service contracts and reclaimer relationships early. Capital cost is the bigger lever: replacing a system now, while parts and installation capacity are still widely available, tends to cost less in total than waiting until scarcity drives up both equipment and labour prices simultaneously. Our guide to eco-friendly refrigerants covers the efficiency side of this trade-off for readers weighing specific replacement options, and our HVAC servicing best practices piece has more on reducing refrigerant losses through better maintenance in the meantime.

Practitioner checklist: contractor operations under the phasedown

Contractors managing this transition day to day need a working checklist as much as businesses do. Stock control matters first: hold enough reclaimed and allowance-backed refrigerant to cover scheduled service work without over-ordering into a rising market. Technician training needs to keep pace with certification requirements as new low-GWP and, in some cases, mildly flammable alternatives enter the field, since handling procedures differ from legacy HFCs.

  • Maintain a rolling refrigerant stock log tied to allowance and reclamation documentation for every batch received.
  • Schedule technician recertification ahead of expiry, not after, given tightening enforcement around handling credentials.
  • Brief clients early on likely service price increases tied to refrigerant type, rather than surprising them at invoice stage.
  • Flag replacement timing options during routine servicing visits, when a system’s remaining life and refrigerant risk are both visible.

A common mistake is treating every legacy system the same regardless of refrigerant type, which wastes reclaimed gas on low-priority assets while high-GWP, high-leak systems keep bleeding refrigerant that becomes harder to replace each year. Akita’s engineers work to F-gas certification standards across the installation, maintenance and repair work covered on the Air Conditioning Maintenance page, and apply the same asset-prioritisation logic described above when advising clients on service versus replacement decisions.

What the phasedown means for US decarbonisation and long-term planning

The AIM Act phasedown exists because HFCs are potent greenhouse gases, and cutting their use to 15% of baseline by 2036 is the United States’ contribution to the international Kigali Amendment framework. The policy logic is straightforward: refrigerant leaks and end-of-life disposal are a genuine source of emissions that regulation can address faster than most other sectors, because the technology to replace high-GWP gases already exists.

The trade-off industry leaders tend to miss is that GWP alone is not the whole picture. A lower-GWP refrigerant in a less efficient system can produce more lifetime emissions than a higher-GWP refrigerant in a genuinely efficient one, once running hours and energy source are factored in. The businesses that get ahead of this treat replacement timing as an efficiency upgrade opportunity, not just a compliance chore, and build the phasedown calendar into their normal capital planning cycle rather than reacting to it deadline by deadline.

— Akita

Essential regulator pages and official documents to consult

Businesses managing phasedown compliance should keep a small set of primary sources bookmarked rather than relying on secondary summaries.

  • EPA Frequent Questions on the Phasedown of Hydrofluorocarbons, the clearest official summary of the allowance schedule and servicing rules.
  • The EPA allocation rule fact sheet, covering baselines, caps and allocation methodology in detail.
  • The Federal Register rulemaking for the full legal text behind the allowance programme.
  • The Technology Transitions final rule fact sheet for subsector restrictions and compliance dates.
  • For comparative context, the EEA overview of the EU’s HFC phase-down shows how EU rules differ, which matters for any business sourcing equipment internationally.

Sources

FAQ

What refrigerant is being phased out in 2026?

No single refrigerant is banned outright in 2026. The AIM Act phasedown caps total HFC allowance volume on a fixed schedule, while Technology Transitions restrictions limit which refrigerants can go into new equipment by subsector, with dates staggered between 2025 and 2028 rather than a single 2026 cutoff.

How much longer will R-134a be available?

R-134a remains legal to use and service under current rules, but it falls under the same shrinking allowance caps as other HFCs, which the EPA’s phasedown schedule reduces to 15% of baseline by 2036. Expect it to become progressively scarcer and more expensive rather than disappearing on a fixed date.

Can you still sell 410A equipment in 2026?

Sell-through rules generally allow equipment manufactured before a subsector’s compliance date to be sold for a limited window afterward, though the exact cutoff depends on the equipment category under the Technology Transitions final rule. Businesses holding R-410A inventory should confirm the applicable date for their specific product type rather than assume a blanket deadline.

Which refrigerants are being phased out in the United States?

The AIM Act targets hydrofluorocarbons broadly, including common refrigerants like R-410A and R-134a, through the allowance system described in the EPA’s phasedown guidance. Technology Transitions rules additionally push new equipment toward lower-GWP alternatives on a subsector-by-subsector basis rather than banning specific refrigerants outright.

Back to blog