At our school in the high desert, we heat our houses with seasonally attached greenhouses. We have a cold winter, mostly sunny, and a warm but not hot summer, mostly sunny. I've been in greenhouses in the summer in the area, and they are roasting hot. I think a lot of plants would be killed or damaged by that kind of heat. A few windows and doors for ventilation is really not
enough to keep the greenhouses cool enough for most living things. At our school, we remove the glazing in April or early May when the outside weather no longer has much risk of frost, and we attach the greenhouses in October or November, when our houses start to need the heat. So my recommendation would be if there's any way to design it to be able to remove or totally open some of the glazing for the summer, it would be much better than keeping a few ventilators and shades.
