Magnetite window comparison; the window on the left has a magnetite window panel installed and the window on the right does not. It is well below freezing outside and the window with the magnetite panel is 8 degrees warmer than the window without it.
Testimonials
Laura - St. Charles, IL
They were very thorough with how they looked for stuff, and they didn't necessarily recommend the most expensive solutions. He was right on time and very professional.