A Beginner's Guide to Solar Heat Reduction with Window Film

https://astro-wiki.win/index.php/Energy_Efficiency_with_Window_Films:_Save_Money_and_Comfort

Understanding how sunlight affects indoor spaces is a first step toward making a home or a small office more comfortable. You feel it on your skin when a sunbeam slides across a chair in the afternoon, and you notice the glare on a computer screen