Duct Sealing

Is There a Thief in Your Ductwork?

There are more than a million miles of duct work in Duct sealing

U.S. homes; and industry experts estimate that more than two-thirds of them are leaky enough to justify sealing or repair. Leaky ducts can significantly increase air conditioning and heating bills, dramatically reduce equipment capacity and performance, as well as result in potentially dangerous indoor air quality problems. In fact, we find that duct leakage is responsible for most of the comfort complaints experienced by homeowners today.

The Solution

The certified technicians of A Cooler House can deliver the solution to your Duct Leakage issues like no other service company in Texas. Our techs have sealed over 10,000 duct systems over the last 5 Years. We have the equipment and know-how to correct any and all of your duct system woes.

Why Is Duct Leakage Important?
Leaks in forced air duct systems are now recognized as a major source of energy waste in both new and existing houses. Studies indicate that duct leakage can account for as much as 30% of total house energy loss, and in many cases has a greater impact on energy use than air infiltration through the building shell. Just as important, duct leakage can prevent heating and cooling systems from doing their job properly, resulting in hot or cold rooms, and humidity problems. Worse yet, duct leaks can create air quality problems by pulling pollutants and irritants directly into the house.

Here are just a few of the problems resulting from duct leakage:

Leaks in the supply ductwork cause expensive conditioned air to be dumped into the attic, crawlspace or garage instead of into the house.
Return leaks pull outside air into the duct system reducing both efficiency and capacity. In humid climates, moist air being drawn into return leaks can even overwhelm a new system's cooling ability.
the dehumidification capacity of air conditioning systems causing homes to feel clammy even when the air conditioner is running.
Heat pumps are particularly susceptible to comfort complaints from duct leakage, especially during the heating season. Duct leaks can cause the air coming from heat pumps to feel luke-warm or even cold during the winter. In addition, leaky ductwork has been found to greatly increase the use of electric strip heaters in heat pumps during the heating season.
Leaks in return ductwork draw air into the house from crawlspaces, garages and attics bringing with it dust, mold spores, insulation fibers and other contaminants.
Household depressurization from duct leaks and imbalanced duct systems can cause spillage of combustion products (from furnaces, water heaters and fireplaces) into the house.

Measuring Duct Leakage
A duct leakage performance test involves pressurizing the duct system with a calibrated fan and simultaneously measuring the air flow through the fan and its effect on the pressure within the duct system. Duct leakage measurements are used to diagnose and demonstrate leakage problems, and estimate efficiency losses from duct leakage.

Two different types of performance testing systems are used to measure duct leakage; a Duct Blower and a Blower Door.

Duct Blower
A Duct Blower is used to directly pressure test the duct system for air leaks, much the same way a plumber pressure tests water pipes for leaks. The Duct Blower fan is first connected to the duct system. After temporarily sealing all remaining registers and grills, the Duct Blower fan is turned on to force air through all holes and cracks in the ductwork. A precise leakage measurement is then made using an airflow and pressure gauge connected to the Duct Blower system. Estimates of efficiency losses from duct leakage can then be made from the leakage measurements.

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