energy efficient window upgrade 2

https://web-wiki.win/index.php/When_a_Window_Fogs_Up:_The_Real_Story_Behind_Insulated_Glass_Unit_Replacement

I finally replaced my old drafty windows with double-pane, low-E glass units, and the difference is incredible. Not only did my heating bill drop noticeably last month, but the house feels much more comfortable without cold spots near the glass. The upgrade was worth every penny for the comfort and energy savings alone.