I had a friend who used to live up in the siera where power cost her for gas or propane and she had lots of wood. She had a cupboard built above the kitchen range just for proofing. As the range almost never was allowed to cool off, the cupboard was always just right.
And bread baked in a wood overn is really better. Then another friend had a cupboard that was next to heating ducts in idaho falls, in the winter the heat was almost never off so that was perfect too. What I'd like to do is build both a solar proofing box and a solar oven. Maybe when I retire and have time and energy. Tom
