Why is a chest type freezer considered to be more efficient than an upright model?
What will be an ideal response?
The chest type freezer has a lid that opens upward. This way the cold air, which is heavier than warm air, stays inside the box where it belongs. On the other hand, an upright freezer has a door that opens from side to side. When the door is opened the cold air "falls" out of the box and is replaced with warm air from the room, which now needs to be cooled.
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