The real answer is that you should minimize the risk that you walk away and leave the door open for hours, and open it zero times whenever possible. The relative heat loss from 1 vs many separate openings is not significantly different from each-other, but it is much more than 0, and the tail risk of “all the food gets warm and spoils” should dominate the decisions
The real answer is that you should minimize the risk that you walk away and leave the door open for hours, and open it zero times whenever possible. The relative heat loss from 1 vs many separate openings is not significantly different from each-other, but it is much more than 0, and the tail risk of “all the food gets warm and spoils” should dominate the decisions