Duct sealing in winter keeps warm comfort flowing to all parts of your home.
According to the U.S. Department of Energy’s Office of Energy Efficiency and Renewable Energy, air leakage from existing residential ductwork averages at least 30%. That means nearly one-third of the heat generated by your furnace may never reach the rooms it’s supposed to keep cozy. Instead, heat is lost into the attic, the crawl space, or the interior of walls.
While leaky ductwork is a year-round issue — air conditioning in summer is also lost through leakage — duct sealing in winter provides certain seasonal benefits specific to cold weather. Here are some examples:
- Lowering heating costs. Heat loss from duct leaks means your furnace runs longer cycles to compensate and meet thermostat settings. This consumes more energy and boosts monthly heating bills by as much as 20%. Sealing duct leaks provides immediate as well as long-term savings. According to the Department of Energy, sealing ductwork can eventually pay for itself in lower heating costs.
- Warming up cold spots. Leakage from branch ducts that extend to individual rooms means certain rooms remain chronically heat-deprived during the winter. Thermostat adjustments generally don’t help because a significant portion of the air volume that’s supposed to heat the room is actually warming the attic or other location where duct leakage occurs. Duct sealing in winter helps restore system air balance and keep temperatures consistent throughout the home.
- Improving air quality. While warm air leaks out of supply ducts in your HVAC system, leaks in return ducts may actually draw unfiltered external air into the ductwork. This stale air may originate from parts of the structure such as the attic, crawl space, or inside walls, and may be contaminated with toxic mold spores, hazardous insulation fibers, and other pathogens. Because the house is more closed up during winter and ventilation is reduced, airborne particulates may accumulate to unhealthy levels in living spaces. Sealing duct leaks prevents infiltration of unfiltered, unhealthy air into ductwork.
Contact the professionals at Aggressive Mechanical Contractors for more information about the benefits of duct sealing in winter.