Indoor Comfort: How Window Films Regulate Temperature and Light

https://wiki-fusion.win/index.php/DIY_Window_Film:_When_It%27s_OK_and_When_to_Hire_a_Pro

Window films sit on the inside of glass like a thin, durable skin. They’re not magic, yet after years spent watching buildings breathe easier in summer and feel cozier in winter, I’ve learned to respect the quiet efficiency they bring