Ursula has the advantage of actually having her greenhouse up and going for several years. Since I don't have a single glass panel in place, I have far more questions than answers right now.
Keep in mind, Kathy, that I am building a fully climate controlled sunroom. Thus Ursula's room and my room will function differently. In many/most instances, those two French doors at both ends will remain open. Thus the space will be a heated/cooled space, just like the rest of the house. There would be no reason to have the space vented, as that would work against my central AC/heat. Of the original three ceiling fans, I will keep two fans, but am upgrading to high-efficiency fans. Those fans will be sufficient to move the cool air/warm air so that the entire 600 sf. room has a uniform temperature. At least that's my plan. The glass I am using filters out 90% of the UV and gives me 50-60% shading, depending on whether it is the side glass or roof glass. I will have to see what sort of shade-cloth I'll need in the summer months. That's one of my big questions and only time and experience will give me that answer. But as Ursula has stated, I would probably want all the light possible during the fall and winter months.
