Convertible Greenhouse Winterized

It took about 1.25 hours to put the polycarbonate panels back on. If I had whatever money I would build the GAHT ground to air heat transfer system for deep winter. I don’t need to grow food in the winter, but I want it in case the electricity goes out. I use my Greenhouse in the winter to workout and sweat quick. You could easily automate this greenhouse if you wanted. It would also be easy to do a rain catchment on the greenhouse. My cost for everything was under $2000. If I had to pay for new doors and the polycarbonate, it would be $3000-4000 in materials. That’s still a great price compared to kits that are half the size. I built this in under 2 work weeks, closer to a week and a half by myself mostly.