I remember when my wife and I first looked at the house we now own. As my wife walked through with the realtor, I poked around the basement, under the sinks, and around the outside. When I went back into the house, I noticed that the cold air returns were in the floor of the dining room. Since the floors in the living room and dining room were wall-to-wall carpeting, I lifted out the register to see if I could determine what was underneath the carpeting. Hiding under...