“…heat entering through glass surfaces significantly reduces heating and cooling efficiency.”
Heat entering during the winter is good. There has been a lot of research in past decades on passive heating tech and designs.
OT but related: the author has no clue what “efficiency” means.
https://freerepublic.com/focus/chat/4324635/posts?page=4#4
Lots of other things “reporters” have no clue about.