What type of refrigerant does this model use and why does it matter?

The refrigerator uses either R-600a or R-134a as refrigerant, which you can identify by checking the compressor label on the rear of the appliance or the rating label inside the fridge. If your product contains flammable gas (R-600a or R-134a), you must contact your local authority regarding safe disposal of the product. [Page 6]