Organofluorides
Halomethanes
Ozone depletion
American Society of Heating
Refrigerating and Air-Conditioning Engineers
A1
Difluoromethane
1
1-Difluoroethane
Dichlorodifluoromethane
2-Tetrafluoroethane
Refrigerants
Chemistry
Heating
ventilating
and air conditioning