According to the Energy Star program, about 20 percent of the air traveling through ductwork in the average home is lost through leaks and holes. The National Renewable Energy Laboratory pegs that figure more broadly at 10 to 30 percent. Regardless, any leaking at all is a problem, says Benjamin Meredith, whose company, Building Knowledge, performs home inspections and home energy audits in and around Harrisonburg. Call it death by a thousand leaks. If your home is like pretty much every other American home that heats or cools with a forced-air system (where the heated or cooled air travels through ducts and out registers in the floor or ceiling), one if its most inefficient features is almost certainly that ductwork. According to the Energy Star program, about 20 percent of the air tra...
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