No, you cannot directly retrofit or "drop-in" R-454B into existing R-410A or R-22 systems.
No, R-454B is not a drop-in replacement for R-410A. You cannot retrofit or mix them in the same system.
January 1, 2025: Manufacturers stopped producing new R-410A residential split systems and heat pumps. Equipment manufactured before this date can still be sold and installed. January 1, 2026: The original deadline for installing R-410A split systems manufactured before 2025.
Con: R-454B is mildly more flammable
In fact, all refrigerants are. But R-454B is classified as having an A2L rating, while R-410A is classified as having an A1 rating. However, this shouldn't scare you. It's still only mildly flammable, and as long as it's handled correctly, it's perfectly safe.
Trying to use R-454B in a system built for R22 or 410A can cause leaks, breakdowns, and even void your warranty.
R-454B/R-32 Implications: because R-454B and R-32 have a mildly flammable characteristic, a non-sparking vacuum pump is required.
R-410A is currently being phased down rather than fully banned, with the production of new R-410A equipment already banned. The remaining supply will be gradually reduced by 85% through 2036.
R-454B shows 98 % capacity and 102 % efficiency compared to R-410A at rating conditions of 35 °C outdoors and water return temperature of 12 °C.
As of January 1, 2020, the United States banned the use of the R22 refrigerant, commonly known as Freon.
It is said to have been exacerbated by a lack of cylinders equipped with pressure relief valves with the left-handed threads required for A2L refrigerants, raw material shortages and limited production capacity.
R-22 refrigerant typically costs between $𝟗𝟎 and $𝟐𝟓𝟎 per pound. Because R-22 has been phased out, the supply is dwindling, which causes prices to continuously climb.
The primary replacements for R-410A in new HVAC systems are R-32 and R-454B. Both are environmentally friendly "A2L" (mildly flammable) refrigerants. Because of this classification, R-410A cannot be directly substituted with these new gases; entirely new equipment designed for safety and handling is required.
A2L refrigerants, the new refrigerants for 2026, will replace R-410A in new systems. A lot about A2L refrigerants is explained in their name: The “A” means low toxicity. The “2L” is a safety classification, indicating it is mildly flammable.
Short answer: Yes. Eligible R410A systems manufactured before January 1, 2025, can still be installed in 2026 under the Technology Transitions Rule issued by the U.S. Environmental Protection Agency. There is no nationwide ban on the installation of compliant R410A equipment.
Q: Are the R-454B coils/TXV's compatible with R-410A condensing units? A: Full furnace coils are not interchangeable. The refrigerant designed for the indoor coil must match that of the outdoor unit. Replacement Components will offer replacement coils only that can be used to replace either R-410A or R-454B coils.
The best replacement for R-22 depends on your system's configuration. Because R-22 is fully phased out, the most common drop-in substitutes are R-438A (MO99), R-407C, and RS-44b (R-453A). These allow for system retrofits, though complete system replacement is often recommended for aging units.
“Can I still use R-410A in one of the new heat pump systems that runs on R-32 or R-454B?” Short answer: No. Not even close. And here's why that matters if you're replacing your system in 2025.
Have HVAC Prices Gone Up in 2026? Yes HVAC prices have steadily increased over the past few years, and 2026 is no exception. These increases are affecting everything from entry-level systems to high-efficiency units, making it more expensive than ever to install or replace HVAC systems.
Yes, you can still buy R-410A equipment. While the production and import of new R-410A systems were banned at the manufacturer level starting January 1, 2025, retailers and contractors are still legally permitted to sell and install existing overstock manufactured before the cutoff date.
Meaning the phase out of R22 has been planned for almost 30 years. So in summary, it's true, the EPA has mandated that no new “virgin” “HCFC 22” can be manufactured or imported after 2020 due to its effect on the environment.
Many Amish homes are built with plenty of windows to help circulate the air and bring in the cooler overnight temperatures. They open the windows on the top floors to help the heat escape while the family retreats to the lower grounds within their homes for comfort.
There is no single "best" AC brand, as the ideal choice depends on your region, budget, and whether you need whole-house central air or room units. Globally, industry leaders are ranked by their reliability, efficiency, and technological innovation.
R-410A is currently being phased down rather than fully banned, with the production of new R-410A equipment already banned. The remaining supply will be gradually reduced by 85% through 2036.
Trane is phasing in the transition to R-454B in 2024, starting with the adoption of R-454B refrigerant in its residential products, beginning with the XR15 SEER2 heat pump.
R454B refrigerant
This refrigerant is based on HFO technology and boasts a low GWP of 465, with CO2 emissions 78% lower than R410A and 31% lower than R32.