As homeowners, we tend to focus on the home maintenance we can see. We paint the walls, mow the lawn, and clean the gutters. But two of the greatest safety and efficiency hazards in your entire home are completely invisible, tucked away out of sight behind drywall and masonry. We are talking about your chimney flue and your clothes dryer vent line. According to the National Fire Protection Association (NFPA), neglected chimneys and clogged dryer vents are leading causes of re