Hey, everybody, this is super off topic but I would like to get some help. I live in an old house and it is going to hit its 80th year this June. The house is still pretty but it's falling apart since the previous owners never did any major repairs to it. Firstly I am thinking of replacing all the windows with energy efficient ones. While doing some research online I came across a blog ( http://northtechwindows.ca/2017/01/03/6-benefits-vinyl-windows/ ) that mentioned some of the benefits. Does anybody over here have energy efficient windows at home? How good are they? Any thoughts on this would be great.