Complex sentence: At this application PI is circulated through the already available piping as a coolant, replacing environment unfriendly refrigerants, like R-22 (Freon ®) and other hydro chlorofluorocarbons (HCFC's).
Split into simpler sentences: At this application PI is circulated through the already available piping as a coolant. PI replaces environment unfriendly refrigerants, like R-22 (Freon ®) and other hydro chlorofluorocarbons (HCFC's).