Propose deletion. It's copyright and just not good information.
- Don't know about copyright, but whatever it is, its in the wrong place slapped into a category page.
There is some merit in the advice on reducing drafts, using thermal curtains etc. It could also do with making a bit more wiki friendly (sections, contentes etc). I propose moving it to its own article - say Energy saving tips - windows. --John Rumm (talk) 11:07, 16 September 2016 (BST)