Chuck Bettis , Apr 26, 2000; 09:04 a.m.
As a professional firefighter, I was curious about this also and began to observe refrigerators post-fire. While refrigerators theoretically make great insulators, they have one fatal flaw and that is the rubber/magnetic door seals. In significant fires, I invariably find that the door seals have failed and in many cases the door has opened and exposed contents to fire/gasses/high heat. In contrast, I've seldom seen fireproof (nothing is really fireproof) safes opened after very hot fires in which the contents were destroyed.....but often discolored or damaged. Even that fireproof safe will act as an oven and any heat sensitive materials inside will be impacted.