NU-22 refrigerant replacing R-22 refrigerant Do you have an older air conditioner using R-22 Freon refrigerant and don’t want to pay for the expensive R-22 ask your current air conditioning company to use the NU-22 drop in replacement refrigerant for that older R-22 air conditioner. NU-22 refrigerant replacing R-22 refrigerant Many companies are charging up…