At my place that trick works the first day, but after that it's over. The house always heats the same under this sunshine, slowly rising to 28-30 at the end of the day with everything closed and down from like 22-24 in the morning. The only question is whether that's better than a higher temperature with a slight breeze and fresh air. Today, it won't be higher than 30, so I'd rather have wind. The next 4 days, it'll be 35 or higher, so everything will get closed down during the day