What kind of freon would you use for an apartment freezer?

Most apartment freezers use R-134a as their refrigerant, which is commonly found in household appliances. However, some older models may use R-12, which is now phased out due to environmental regulations. It's important to check the manufacturer's specifications or the nameplate on the appliance for the correct type of refrigerant. Always consult a professional for refrigerant handling and replacement.