Primary and secondary
Organic and inorganic
Zeotropic and azeotropic
Halocarbons and hydrocarbons
R 12
R 13
R 22
R 134a
700 + ( Molecular mass of NH3) = 717
700 + (Molecular mass of NH3) = 718
700 + (Molecular mass of NH3) = 719
700 + (Molecular mass of NH 3) = 720
Number of hydrogen atoms
Number of chlorine atoms
Number of carbon atoms
Number of fluorine atoms
Ice
Dry ice
Primary refrigerants
Secondary refrigerants