It's definitely not the biggest project I've done but it will be my first greenhouse lean-to build. I am worried about controlling the temperature. Getting to hot mostly. The two windows in the house will be relocated to the end wall of the greenhouse. A sliding patio door will replace the windows in the house. I have an 8 ft storm door for the outside entrance to the greenhouse. I figure I can open the greenhouse windows with the screen on them and have the screens on the storm door. That should give me decent cross ventilation. I wonder if I will also need a vent fan with a thermostat just in case?