R-410A Is Being Phased Out. What the New Refrigerants Mean

Homeowners who lived through the R-22 phase-out will recognise the pattern. Federal rules are reducing production of high global-warming-potential refrigerants, and R-410A, the refrigerant in nearly every residential system installed since the mid-2000s, is the one affected this time. New residential equipment has moved to a new class of refrigerants, most commonly R-454B and R-32, and manufacturers have stopped producing new R-410A systems for the US market.

That sounds alarming. In practice, for most homeowners, the effect over the next several years is modest. Here is what changes and what does not.

If you have an R-410A system today

Nothing has to change. Your system is legal to run, legal to repair, and legal to recharge. R-410A itself is still manufactured, and the phase-down is a gradual reduction in production rather than a stop. Unlike the R-22 phase-out, there is a very large installed base of R-410A equipment and a long service tail is expected. Prices for the refrigerant may drift upward over time, but the shortage-driven spikes that R-22 owners saw are not the near-term picture.

What you cannot do is put the new refrigerants into an R-410A system. They run at different pressures and the equipment is designed for them. A repair on an R-410A system uses R-410A, full stop.

If you are replacing a system now

You will be quoted equipment on one of the new refrigerants. This is not a compromise; it is simply what is made now. The new refrigerants are efficient and the equipment designed around them performs at least as well as what it replaces. A few things do change on the installation side, and they are worth knowing so you can tell a careful install from a rushed one.

• The new refrigerants are classed as mildly flammable, which is where the A2L label comes from. They are far harder to ignite than propane or natural gas, but the classification brings requirements: leak sensors in some air handler configurations, specific ventilation practices, and brazing procedures that manage the risk. A good installer follows them as a matter of course.
• Line sets are usually replaced, not reused, when changing refrigerant type. Reusing an old R-410A line set with a new system is a shortcut that the equipment manufacturers advise against.
• The outdoor and indoor units must be matched for the new refrigerant. A new outdoor unit on an old R-410A coil is not an option.
• Technicians need the right recovery equipment, gauges and detectors for the new refrigerants. Ask.

Does this change the repair-or-replace decision?

A little, at the margins. An R-410A system that is young and healthy should be repaired and kept. An R-410A system that is old and has a major failure such as a compressor or a leaking coil was already a replacement candidate, and the refrigerant transition makes that slightly clearer, because a large repair keeps you on a refrigerant that is on a slow decline rather than moving you onto the one with the long future. It is not a reason to replace a working system.

Heat pumps and the same story

Everything above applies equally to heat pumps, which use the same refrigerants. If you are weighing a heat pump against a straight AC and furnace for a North Texas house, the refrigerant question does not favour either; both are on the new class now.

What we recommend

Do not rush a replacement because of the refrigerant change. Do keep an R-410A system well maintained so it runs out its natural life without a leak, since a leak is the point at which refrigerant cost becomes a factor. And when the time comes to replace, expect the full scope described above, and ask any installer how they handle the A2L requirements. The answer tells you a lot about the rest of the job.

Family-owned in Rockwall, licensed and insured. TX HVAC License TACLB2360E. (469) 338-5533.