- Existing R-410A equipment can continue to be serviced using refrigerant from existing stock through the service life of the unit.
- New systems purchased now use R-454B — Legendary stocks the equipment, tools, and refrigerant for both refrigerant types.
- R-410A and R-454B cannot be mixed — any system service must use the refrigerant the system was designed for.
Purchasing a new air conditioner or heat pump in 2025 or later
Systems installed after the transition date use R-454B. Daikin Aurora, Fit, and residential split systems are now manufactured for R-454B. Installation procedures, line sets, and service tools differ from R-410A — technician certification for the new refrigerant is required.
Your existing R-410A system needs refrigerant service
Existing equipment is not affected by the production ban — only new equipment manufacture transitioned. R-410A is available for service from existing stock. When your R-410A system eventually reaches end-of-life, its replacement will be an R-454B unit.
Why the refrigerant transition is happening
High-GWP refrigerants like R-410A contribute to greenhouse gas emissions when equipment leaks or is improperly recovered. EPA's AIM Act phased out production of new R-410A for HVAC equipment, pushing manufacturers to lower-GWP alternatives like R-454B, which has roughly one-third the global warming potential.
What's different about servicing R-454B systems
R-454B is mildly flammable (A2L classification), which means service requires updated tools, procedures, and technician certification. Legendary's technicians are certified for both refrigerant families. System labels, line sets, and recovery equipment are all refrigerant-specific.
Mixing refrigerants damages compressors and voids warranties
Adding R-454B to an R-410A system — or vice versa — creates an unpredictable refrigerant blend that operates at incorrect pressures, damages compressor valves, and immediately voids the manufacturer warranty. Only use the refrigerant the system was designed for.
Non-certified service on A2L refrigerant creates safety risk
R-454B's mild flammability requires trained handling and ignition-source awareness during service. Legendary technicians carry appropriate certification and equipment for both R-410A and R-454B service.
Questions homeowners ask
- Does the R-410A phase-out affect my existing air conditioner?
- No — existing R-410A equipment can continue to be serviced through the remaining service life of the unit. The phase-out applies to new equipment manufacture, not to service refrigerant for systems already installed.
- Is R-454B more expensive to service than R-410A?
- R-454B pricing will fluctuate as supply chains stabilize post-transition. Legendary provides flat-rate service pricing inclusive of refrigerant so you know the cost before work begins.
- Will my Daikin warranty cover R-454B equipment?
- Yes — Daikin's R-454B equipment carries the same warranty terms as previous generations. Legendary as a Daikin Comfort Pro dealer registers installations to protect the full warranty period.
Editorial provenance
Content by Legendary Service editorial team
Updated:
Methodology
Guidance compares the stated system factors, applicable utility program rules, and the conditions that must be confirmed in the home. Figures are planning ranges, not quotes; Legendary Service provides an upfront flat-rate price after diagnosis.