Lou has insulated the walls and put up the panels, which will be stained and varnished. The bathroom is in the corner, with the toilet in the far corner, the shower next to it and the sink in the righthand corner. The kitchen will be to the right of the bathroom. Hot water will be supplied by an on-demand heater. And the place will be heated/cooled by a mini-split unit. Lou believes his casita is so well insulated that his heating and cooling power use will be minimal.