On hindsight, I wish I'd tracked the data for you :) We were fortunate enough last year to still have quite cool nights; even if I screwed it up, opening the w

On hindsight, I wish I'd tracked the data for you :) We were fortunate enough last year to still have quite cool nights; even if I screwed it up, opening the windows at both ends of the house would cool the place down quite well over night. The only really awkward part was when my wife would come home at 6pm, and she'd be uncomfortably warm until it got dark (which wasn't until 10:30pm or so).