October 30, 2017
Hot air leaking out of our homes in winter and coming in during summer wastes more energy than most of us would ever imagine. Air leaks may account for 15 – 25% of the heat our furnaces generate in winter. An average unweatherized house in the United States loses as much air as it would if a good-sized window were left open year round. Some $13 billion worth of heating/cooling energy escapes through holes and cracks in residences. Where are these leaks in your home: floors, walls, ceilings (31%), ducts (15%), fireplace (14%), plumbing holes (13%), doors (11%), windows (10%) and fans, vents (4%).