energy efficient window upgrade 3

https://echo-wiki.win/index.php/When_Windows_Fog_Up:_A_Practical_Guide_to_Window_Seal_Repair

Switching to double-glazed windows with low-emissivity coatings really cut down our heating bills last winter. The house feels much less drafty, and we barely noticed the cold on the glass. It was a solid investment for comfort and savings.