HVAC Skill Level Challenge: 20 Questions to Uncover Your Hidden Expertise!Which refrigerant is banned under the Montreal Protocol?30%Next Correct Incorrect R-22 (Freon) depletes ozone and is phased out. R-410A (Puron) is a common HFC replacement. Which refrigerant is banned under the Montreal Protocol? R-410A R-32 R-134a R-22 30%
