I have a Hotpoint gas range. I got it because it has no electronics and will probably last until the bombs fall and the ants and cockroaches take over. It is awesome, and cooks my food as well as any range can be expected to.
However, because apparently ranges with complicated and easily breakable computers are "in" right now, it was a cheap model, and I've discovered that the gas heater for the oven/broiler is totally uninsulated. So a lot of heat leaks into the kitchen, which helps during winter, but hurts during summer. The oven burner is rated at 18,000 BTUs, so it's not an insignificant amount of heat to be adding to the house for a typical one-hour bake cycle.
Therefore, I would like to insulate the burner compartment and the oven. For this, I was thinking about using spare mineral wool insulation that I have left over. This stuff is rated to more than 2,000 degrees and is totally non-combustible. It's about R-4.2 per inch, so I could probably get about R-8 or more in the hollow side panels where insulation pretty clearly goes in the more "high-end" models.
Does this sound sane?