Hello.
I recently purchased a house in sunny Dallas, TX and am looking for ways to increase its energy efficiency. I had looked previously at purchasing 3M window film that claims to reduce about 50% of the solar energy. I learned, however, that the previous seller replaced the windows recently with double-hung low-e windows that have a solar heat gain coefficient of .36. Is there value in putting an energy-reducing film on windows that are this efficient? Does the math work that film + the windows would result in .18 transmission (50% of .36)?
Thanks for your help
I recently purchased a house in sunny Dallas, TX and am looking for ways to increase its energy efficiency. I had looked previously at purchasing 3M window film that claims to reduce about 50% of the solar energy. I learned, however, that the previous seller replaced the windows recently with double-hung low-e windows that have a solar heat gain coefficient of .36. Is there value in putting an energy-reducing film on windows that are this efficient? Does the math work that film + the windows would result in .18 transmission (50% of .36)?
Thanks for your help