In our segment on window treatments we look at ways to control heat gain and loss through windows. We use sun control film on the upper windows. Also close fitting insulated blinds Block out blinds on the western face of the upper floor. We also use removable shade sails so we can put them up in summer and remove them in winter when we want the sun to warm the area. This is part of our orientation program for the house.
https://nutsandboltsdiy.com/window-treatments/