Alternatives to R-410A are mildly flammable (A2L) and many state building codes do not yet allow their use in stationary comfort cooling equipment. But that is changing quickly.

The HVACR industry is in the process of transitioning away from HFCs such as R-410A to alternative refrigerants that are mildly flammable (A2L). Because of their flammable nature, these refrigerants are referred to in terms that may not be familiar to contractors and technicians.

Some alternatives to R-410A are mildly flammable (A2L) and thus require updated building codes and standards to ensure their safe use.

As the HVACR industry transitions away from HFCs such as R-410A to alternative refrigerants that are mildly flammable (A2L), it is not surprising that those who will be handling – or teaching about -- these new products have a lot of questions.

The HFC phasedown started this year with a 10% production cut, which is starting to affect the price of refrigerants such as R-410A.

Unlike the last transition, which shifted from the use of one nonflammable refrigerant to another, many of these new refrigerants are mildly flammable (A2L), so additional training will be needed in order to safely use them.

Recently, the Underwriters Laboratory (UL) has approved the second edition of its UL 60335-2-89 standard, which includes higher R-290 charge limits that would expand its potential uses in commercial refrigeration.

It would be wise to take the time now to learn how to safely handle and transport A2Ls, as customers are already starting to ask about these new refrigerants.

Chiller OEMs have been preparing for a refrigerant phasedown, and they are identifying alternative refrigerants that are efficient, safe, and cost-effective.