New residential air conditioning units can only use R-410A, but older units running R-22 still exist, and Seltrade can offer both these refrigerants in various brands. New residential air conditioning units can only use R-410A, but older units running R-22 still exist, and Seltrade can offer both these refrigerants in various brands.

New residential air conditioning units can only use R-410A, but older units running R-22 still exist, and Seltrade can offer both these refrigerants in various brands. New residential air conditioning units can only use R-410A, but older units running R-22 still exist, and Seltrade can offer both these refrigerants in various brands.