The year 2026 marked a significant turning point for the US HVAC industry. New equipment regulations took effect that changed which refrigerants can be used in new residential and commercial systems. Contractors who serviced residential AC systems for the past 15 years using R-410A as their standard refrigerant are now encountering new equipment charged with refrigerants they may never have worked with before. The question is no longer “will things change?” they have. The question now is “how do I adapt, and fast?”
This article provides a comprehensive update on new HVAC refrigerants in 2026: what regulatory changes took effect, which refrigerants manufacturers use in new equipment, what remains serviceable in the existing installed base, and what contractors need to know to stay compliant, capable, and competitive in this new landscape.
What Changed in 2026 for HVAC Refrigerants?
The most significant change that took effect in 2026 for HVAC refrigerants was the EPA’s final rule under the AIM Act establishing that refrigerants with a GWP greater than 750 cannot be used in new residential and light commercial air conditioning equipment. This rule effectively phased out R-410A (GWP 2,088) from new manufacturing.
Equipment manufacturers had been preparing for this transition for several years, developing and testing next-generation systems using R-32 (GWP 675), R-454B (GWP 466), and other qualifying lower-GWP refrigerants. By January 2026, major manufacturers including Carrier, Trane, Lennox, Daikin, Mitsubishi, and LG had certified product lines using these next-generation refrigerants and had begun or completed the transition in their new equipment manufacturing.
The AIM Act Timeline: 2026 and Beyond
The AIM Act phase-down of HFCs is structured around production and consumption benchmarks measured in CO2 equivalent. The phase-down schedule requires:
- 10% reduction from baseline by 2022 (already achieved)
- 40% reduction by 2024
- 70% reduction by 2029
- 80% reduction by 2034
- 85% reduction by 2036
These reductions apply to aggregate HFC production and consumption weighted by GWP. The practical effect is that higher-GWP refrigerants like R-410A become increasingly restricted over time, while lower-GWP alternatives occupy a larger share of a shrinking total. Contractors need to understand this trajectory to make informed decisions about equipment, training, and inventory for the medium and long term.
New Refrigerants in Residential Equipment in 2026
R-454B: The Leading R-410A Replacement
R-454B, sold as Opteon XP44 by Chemours and Puron Advance by Carrier, is the refrigerant selected by several major residential AC manufacturers as their primary R-410A replacement. It has a GWP of 466 far below R-410A’s GWP of 2,088 and is an A2L mildly flammable refrigerant.
Carrier, Trane, and several other major manufacturers have centered their next-generation residential product lines on R-454B. Technicians who will service these systems need specific training and A2L-compatible service equipment. The performance characteristics of R-454B are optimized for residential split system and heat pump applications, and factory training from equipment manufacturers covers the specific service procedures for their products. Smart Refrigerants carries R-454B refrigerant in 20lb DOT-compliant cylinders.
R-32: The Dominant Refrigerant in Mini-Split Systems
R-32 (GWP 675) is the refrigerant of choice for the ductless mini-split and multi-split market. Daikin, Mitsubishi, LG, Fujitsu, and other mini-split manufacturers have been using R-32 globally for years and have transitioned their US product lines to R-32 fully. Technicians specializing in ductless systems or working in markets where ductless is common will encounter R-32 regularly in new equipment.
R-32 is a single-component refrigerant, which simplifies some service aspects liquid or vapor charging is acceptable, and fractionation is not a concern. However, as an A2L refrigerant, it requires the same A2L-rated service tools and handling practices as R-454B. Smart Refrigerants offers R-32 refrigerant in 20lb virgin cylinders for technicians servicing the growing installed base of R-32 mini-split systems.
What Hasn’t Changed: Servicing the Existing Installed Base
Despite all the changes in new equipment, the reality for most HVAC contractors in 2026 is that the majority of their service calls still involve R-410A systems. The installed base of R-410A equipment in the United States is enormous tens of millions of units and these systems will continue to require maintenance, repairs, and refrigerant service for many years.
R-410A production continues for service purposes, and the existing installed base creates continued legitimate demand. The phase-down applies to new manufacturing quantities and GWP-weighted consumption, not to a complete ban on service use. R-410A remains legal and available for servicing existing systems. Smart Refrigerants continues to supply R-410A in 25lb cylinders and Honeywell R-410A for service technicians across the US.
Other Legacy Refrigerants Still in Active Service
Beyond R-410A, a significant number of older systems still use R-22 and continue operating. While R-22 production for service ended in 2020, reclaimed R-22 remains available and technicians can legally use it to service existing R-22 equipment. The R-22 service market continues to decline as older equipment gets replaced, but it still represents a substantial service opportunity, particularly in commercial and industrial settings where capital constraints delay equipment replacement.
Retrofit refrigerants including R-438A (MO99) and R-407C remain active service options for R-22 legacy systems. Contractors who can offer well-executed R-22 retrofits provide genuine value to customers who want to extend the life of functional equipment while transitioning to a modern refrigerant.
California’s 2026 Refrigerant Restrictions
California has consistently implemented refrigerant regulations ahead of federal timelines. Effective January 1, 2026, California’s restrictions on virgin high-GWP refrigerants affect several products that remain available in other states. These restrictions include bans on the sale of virgin R-404A, R-407A, R-438A, and several other refrigerants with high GWP for specific applications.
Contractors operating in California must ensure their refrigerant procurement and service practices comply with CARB (California Air Resources Board) regulations in addition to federal EPA requirements. The California restrictions are more aggressive than federal requirements and apply to different equipment categories on different timelines. Contractors with operations in California should maintain current awareness of CARB guidance and ensure their supplier can confirm the compliance status of each product being purchased.
A2L Refrigerants: The Safety Requirement Every Contractor Must Address
A2L refrigerants including R-32, R-454B, and others appearing in new equipment represent the single most important operational adjustment HVAC contractors face in 2026. The “2L” classification means mildly flammable, and the “A” means low toxicity. These refrigerants can burn under specific concentration and ignition conditions, though they require much higher concentrations and more energetic ignition sources than typical flammable gases.
The practical implications include updated equipment requirements (recovery machines, leak detectors), updated installation requirements (minimum room sizes, leak detection provisions), updated storage practices, and updated training for all technicians. ASHRAE Standard 15-2022 and UL 60335-2-40 address the safety requirements for A2L refrigerant use in HVAC systems.
Manufacturer Training Requirements for A2L
Most major HVAC equipment manufacturers now require or strongly recommend A2L-specific training for technicians who will service their R-32 or R-454B equipment, and several use A2L training completion as a warranty condition. ACCA (Air Conditioning Contractors of America), ASHRAE, and equipment manufacturers themselves offer A2L training programs that range from online self-paced courses to in-person workshops.
Completing A2L training and documenting it for each technician demonstrates competence to customers, protects the company in warranty claim situations, and reduces the risk of incidents when working with these refrigerants. The investment in training is modest compared to the risk of being unprepared.
Refrigerant Supply Planning for 2026 and Beyond
Refrigerant supply planning in 2026 requires contractors to think across two distinct product generations simultaneously. Contractors still need legacy refrigerants (R-410A, R-22 service options, R-407C, R-438A, R-452A, R-407A) for the existing installed base. Contractors increasingly need next-generation refrigerants (R-32, R-454B, R-513A) for new equipment service.
Working with a supplier that carries both generations of refrigerant and can provide reliable, fast delivery simplifies procurement. Smart Refrigerants stocks the full range from legacy service refrigerants to next-generation low-GWP products all DOT-approved and EPA-compliant. Establishing a supplier relationship now, before demand for next-generation refrigerants spikes, ensures preferred customer access and competitive pricing as the market evolves.
8 Frequently Asked Questions About New HVAC Refrigerants in 2026
Q1: Can R-410A still be purchased in 2026?
Yes. R-410A remains available for purchase for use in servicing existing systems. The 2026 restrictions apply to new equipment manufacturing, not to service of the existing installed base. Smart Refrigerants supplies R-410A in 25lb cylinders for service technicians.
Q2: What refrigerant is in new residential air conditioners in 2026?
>>> New residential AC systems in the US now use R-454B (in systems from Carrier, Trane, and others) or R-32 (in ductless and mini-split systems from Daikin, Mitsubishi, LG, Fujitsu, and others). The specific refrigerant is printed on the equipment nameplate.
Q3: Is R-454B the same as R-32?
No. R-454B and R-32 are different refrigerants. R-454B is a blend with a GWP of 466, while R-32 is a single-component refrigerant with a GWP of 675. Both are A2L classified. They are not interchangeable.
Q4: Do I need new recovery equipment for A2L refrigerants?
Yes. Technicians must use recovery equipment rated for A2L refrigerants to work safely and comply with manufacturer requirements on R-32 or R-454B systems. Technicians should verify A2L approval before using any recovery machine on A2L systems.
Q5: What happened to R-22 systems?
R-22 production for service ended in 2020. R-22 systems can still be serviced using reclaimed R-22 or retrofit refrigerants like R-438A or R-407C. The installed base of R-22 equipment is declining but still represents significant service volume.
Q6: Are there any refrigerants that don’t require special handling in 2026?
A1 refrigerants (non-flammable, low toxicity) like R-410A, R-407C, R-513A, R-452A, and R-448A do not require A2L-specific handling. A2L refrigerants (R-32, R-454B) require additional A2L handling procedures.
Q7: What is the long-term future of refrigerants in HVAC?
The long-term trend is toward lower-GWP refrigerants. The AIM Act mandates an 85% HFC reduction by 2036. Beyond the current generation of A2L HFOs and HFO blends, the industry is researching natural refrigerants (CO2, ammonia, propane) and ultra-low-GWP synthetic alternatives for the long term.
Q8: Where can I get the refrigerants I need for 2026 and beyond?
>>> Smart Refrigerants stocks both legacy service refrigerants and next-generation products including R-32, R-454B, R-513A, R-410A, R-407C, R-438A, R-452A, R-407A, and R-448A all DOT-approved and EPA-compliant, with fast shipping to contractors nationwide.
Conclusion
New HVAC refrigerants in 2026 represent a genuine transition point in the industry. The regulatory framework is clear, equipment manufacturers have already made their choices, and contractors who understand what has changed can serve both the existing installed base and the new equipment market. Staying current is not optional; it is the foundation of continued business viability in an industry that is actively moving forward.
Smart Refrigerants is ready to support contractors through every phase of this transition. From R-410A service supply for the existing installed base to R-32, R-454B, and R-513A for next-generation systems, Smart Refrigerants has the complete refrigerant portfolio, the compliance documentation, and the service commitment to be the supplier of choice for professional HVAC contractors navigating the 2026 transition and everything that comes after.
