I have a solar air heater built from plans from Mother Earth News if anyone is familiar with that magazine. It has been stored in my storage building for a while and needs a home. It does need a coat of paint on the wood backing. I also built a fan register for it that you could put a low CFM fan on (computer cooling fan) to help with the heat flow. This heater is for supplemental heat so don't think it will heat your entire home because it just won't do that. A small hunting camper, maybe. It's built to fit a 32" window and is approx. 7.5 ft long so you will need a truck or trailer to haul it in. I'm hoping someone can use this heater later this fall, winter and early spring. I have built others I use now and no longer need it.