A Sub-Zero refrigerator can typically maintain safe food-storage temperatures for approximately twenty-four to forty-eight hours during a power outage, provided the doors remain completely closed. Sub-Zero's heavy-duty insulation, thick magnetic door gaskets, and dual-compressor design create an exceptionally airtight thermal seal that slows down internal temperature warming. To maximize food safety during an extended blackout, avoid opening the refrigerator and freezer doors unnecessarily, allowing the trapped cold air to preserve perishable items effectively until power is restored.
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