The problem is that it is sunny in that month. Historically around here, we’d have more cloud cover, and it would be tuned right. The plan was to open the win

The problem is that it is sunny in that month. Historically around here, we’d have more cloud cover, and it would be tuned right. The plan was to open the windows if this was a problem, but we’re also getting more flies / biting flies than before during those months. Of course, the excess sun means excess solar production when most people aren’t running heaters or A/C. The expensive fix is to increase the amount the roof sticks out by a foot or so to block the sun for an additional month in fall and spring. The cheap fix (what we are going for) is to put up curtains or blinds that let us manually tune the amount of passive heating we get from the sun. Either fix would also reduce glare, but only the curtains let us tune the pre/post solstice passive heating. It is colder post-solstice for a given angle of sun, so extending the roof enough for November probably implies paying more for heat in Jan/Feb.