The SUB ZERO BI-48SD/S/TH Refrigerator 48" Built-in W/Dispenser is an ideal addition to your kitchen space. It features dual refrigeration system that uses separate compressor and cooling system for both refrigerator and freezer. The air purification system eliminates air off ethylene molds viruses and bacteria every 20 minutes while the water purification system removes contaminants and chlorine taste and odor from water and ice. The SUB ZERO BI-48SD/S/TH Refrigerator 48" Built-in W/Dispenser comes with the automatic ice maker that produces crescent-shaped ice cubes and max ice feature produces ice for 24 hours. Cold air is sealed with the help of magnetic gaskets around the refrigerator and frozen food remains fresh even at power outages.