Wow, that looks amazing! I am thinking about building an aquaponics
greenhouse too. I would like to grow some tropical fruit plants here in zone 4, so I would need to do it in a greenhouse. But, it gets over 100ºF for several days each summer, hot and dry. I would need to have it set up so that it does not over heat. I would like to build it right up against the house, and vent a
Rocket Mass Heater into it during the winter. I figure that the greenhouse will keep the house warmer in the winter. But, how to keep it from heating the house in the summer? I was thinking about using Polycarbonate for the roof, and twin wall translucent plastic sheets for the ceiling, using 2x
wood framing for the roof. Would it work to have the eaves and top of the roof closed in the winter, to form a dead air space, and then open in the summer to work as cooling vents? I want the walls to have the same construction as the roof. So would it work better to have the gaps between the studs of the walls open to the gaps between the studs on the roof, so that the vents would cool the walls as well as the roof? Would it work better to put a black stripe at the top of the roof, to make the vent work as a thermal chimney? The greenhouse would only be about 10 feet by 24 feet. I want to do a fish
pond about 4 feet into the ground, would that work like a heat-sink in the summer?