I know we're kind of coming to an end of the prime solar cooking season however I feel this could provide supplemental low-tech heat to a dwelling as well-- so stacking functions! I'm thinking if I rearrange myself facing kitchen wall a little bit I would have about 3 ft of space potentially but I could put this or something like it in the wall.
I absolutely love the idea of having an oven on basically all the time as long as the Sun is up but keeping the heat outside when I want to and also not needing to go outside when I don't want to just to check the oven.