HVAC Systems · Components
R-22
Chlorodifluoromethane refrigerant (HCFC) phased out of production in the US as of 2020. Still present in many older residential and commercial systems. Recharge with reclaimed R-22 only; no new production. Consider system replacement when major refrigerant work is needed.
Related terms
Pro launch updates
Get notified when Pro launches, plus a monthly code-change digest. Email only — no account required.