small rocket stove and coiled copper piping, you can heat and pump all the hot water you will ever need without electricity. I agree with Ron Marlett as I have seen a similar hot shower concept here in Africa Bosveldt. This is worth looking in to.
The owner of this house wanted to make a feature of the natural light from his Solatube® Daylighting System and has certainly achieved that with this clever structure. We hear that the effect on a full-moonlit night is stunning too!