While I was attending a Honeywell Refrigerants event at this year’s AHR Expo in Las Vegas, I met some people representing a major Nashville, Tenn., supply house.
I took the time to ask what they were seeing their local service techs doing when it comes to charging air-conditioning equipment that was low on R-22. Their reply was most were using R-407C and they were adding it on top of any R-22 that was left in the system.