Hey, thanks for replying, and sorry for the confusion. The solar collector is only the top slide of that triangular greenhouse thing. Whatever you see painted of a brick color. There is actually a black-painted sheet of corrugated zinc roofing 2" below the transparent panel. The hot air gets inside the chamber from a slot on the top left (looking from standing in front of the door), which is the same size as the screened opening at the bottom of the slide. Yes, there was a wall made of cardboard I made to remedy a mistake made by the guy who helped me make it; then it fell in (you can see it at the bottom of the greenhouse thing inside), but I saw it wasn't affecting the operation much. The chimney is a faux wall on the right-hand side, however, I didn't have enough wood (all the material was donated and on a budget), so I made a half wall that turned into a chimney pipe that I painted black and moved back to the sunny side for a passive solar chimney effect. I am keeping the dehydrator under my solar panel rack to protect it from the rain and excessive sun. I am aware that all my changes jeopardized the top-draft design. Someone told me top-draft is not indicated for the Tropics anyway. Thing is, when the sun is not shining, all activity stops, while I was of the impression that some draft would go on by inertia.
I still like the top draft, because it allows me to have a fan pointing down. A fan at the bottom might get dripped on by my pineapples.