Duct leakage may be causing your indoor air quality problems.
In Residential buildings, the problem with leaky ductwork is that air can not only leak out of you HVAC system and air ducts -- untreated and unclean air and contaminants from the crawlspaces, attic and other place can actually be pulled in to the air you and your family breath. Since so many air duct systems leak and pull bad air in (we find 20 to 40% leakage in 3 out of 4 homes we visit), poor air quality is a problem that many homes have.
Over 90% of existing buildings located throughout North America have air duct systems that contain small holes and cracks that reduce the level of comfort and increase heating and cooling costs.
Leaks are caused by a variety of factors including the age of the dwelling, type of construction, type of ductwork and local building codes.
Leaky ducts in a residential home contribute to:
- Loss of cool and warm conditioned air to the outside or unconditioned spaces of your home resulting in high energy bills
- Even the most energy-efficient heating and cooling systems not performing at its best
- Forcing your system to work harder and wear out sooner, costing you yet more money
- Excess humidity levels that can lead to costly home repairs
- Hard to heat or cool rooms leading to discomfort
- Musty odors and other indoor air quality (IAQ) issues
Residential ductwork sealing improves the performance of heating and cooling systems, making a homeowner more comfortable by:
- Cooling or heating the house more quickly
- Delivering more hot or cold air
- Distributing heating and cooling more uniformly throughout your house
Repairing and patching leaks in HVAC duct systems saves cooling, heating, and fan energy. In air-based systems, ducts deliver all of the heating and cooling to conditioned spaces. Any duct leakage translates into extra air that must be supplied so sufficient heating or cooling reaches the conditioned space. This not only increases effective heating and cooling loads, it also increases fan energy due to increased flow and/or run time. Sealing duct leaks reduces the amount of heated or cooled air the supply fan must handle to deliver the same amount of air to the conditioned space.