5. The adjusted volume (Vadj) of a refrigeration appliance shall be defined as:
Vadj = ΣVc × Wc × Fc × Cc
where Tc is the design temperature in each compartment (in °C);
where Vc is the net volume of a given type of compartment in the appliance and Fc is a factor which equals 1.2 for no-frost compartments and 1 for other compartments;
Cc = 1 for refrigeration appliances belonging to the normal (N) and subnormal (SN) climate classes;
CC = Xc for refrigeration appliances belonging to the sub-tropical (ST) climate class;
Cc = Yc for refrigeration appliances belonging to the tropical (T) climate class.