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Old 10-23-16, 03:00 PM   #40
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It's the electronics, and wiring that need to be kept cool. Insulating the air space around a built in reduces the amount of heat rejection that is needed to keep these components cool.

The other part is ovens are just like houses, good insulation and air sealing reduces energy useage. The weakness in ovens tends to be the air sealing at the door, the thermal bridging there, and the reduced insulation (due to the glass) at the door. Self-cleaning ovens tend to have the best insulation. Ovens with door locks can reduce air leakage, as long as the door lock works to apply pressure on the door. Adding insulation could help, but you need to add it to the oven and keep wiring and electronics outside of it as much as possible. I do agree that most ovens are underinsulated.
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