How many windows does your car have? It sounds like a stupid question, right? But you are probably not sure. The average car has eight individual windows, including the front and rear windshields and side windows. Although these windows may not have many moving parts (note: power window malfunctions rank near the top of common auto repair needs), your windows need maintenance just like every other part of your car.

If you want to reduce energy loss in the home, then it may be wise to replace your windows. A simple window replacement can save you over $450 a year. Your savings will be highest if you choose the most insulated windows, and double paned varieties are often considered the best. Double paned windows feature two layers of glass, and insulating air or argon sits in between the glass. The windows can last a long time, but condensation can build in between the two glass panes.