"Many people who do not own their houses have no control over what kind of windows they have in their homes and apartments, and property owners are notorious for not caring about insulating their houses - the worst power bills I have seen come from the newer apartment complexes that have been built. My home is nearly 3000 square feet and because I have insulated window treatments, insulated doors and a foot of insulation in my attic, my power bills are one third of my daughter-in-law's bills ..." (Quoted from article)