Lucy68 said: Have you looked at auto vents like Bayliss? They are very clever. There is a tube of some kind of wax that expands and contracts with temperature. That pushes a piston that opens and shuts the vent.
Do you know much about these? The current problem is that the panel on top is much like the one on the side, where the glass panes are all connected and need to be lifted together. Plus, this greenhouse was built in the '60s, meaning it takes some force to open it. I plan to upload some pictures of the motor that was being used later, once I get them just so there is any more ideas based on that.
I did think of using something similar to what you've mentioned, I am just very new at this and do not know much of anything about greenhouses.
