Whilst the oven is on cooking what I fancy for my dinner I’ve always filled any empty shelves with food that could do with being baked and then frozen it for another day with the belief that I am saving energy by using up what would otherwise be wasted space in a hot oven, however, my question is this: am I in fact wasting energy by placing items upon an empty shelf that will now absorb energy to cook, energy that the oven must work to replace? Would it have been more efficient to leave the shelf empty so the oven needs only maintain the temperature?
