I was going to put a foil on windows, but found a film that is alleged to reflect rays from infrared spectrum, thus preventing 60% of sun heat of entering a room. Any criticism on it? Or personal experience? Will it really help?
My house has no central air and lots of huge windows on the south, so it gets a bit toasty in the summertime.
I installed window film (brand is "Vista Window Film" if it matters). I don't know what it does in terms of which part of the spectrum it blocks (IR or not?).
It has done a fantastic job. It colors the view just a bit, though you only really notice when comparing against a non-tinted window. Temperatures are bearable in the summer now.