The Aeroseal duct sealing system, developed by the Lawrence Berkeley National Laboratory, can seal ducts from the inside. Holes and cracks up to 5/8-in. wide can be sealed, and air leakage may be reduced by up to 90 percent, claims Aeroseal.
David Byrnes, a Phoenix, Arizona energy auditor, acknowledges the benefits of Aeroseal in his blog “Does Aeroseal Work? An Auditors Review” for Home Energy Pros, but he feels there are some negatives, too. He points out that the treatment does not seal the largest, most important leaks.
“Since crews assume all the duct leakage was found and sealed, if they go into the attic, they will not look for large leaks in the ductwork,” says Byrnes.
By sealing the duct system, it ensures maximum amount of airflow that would reach its intended destination.
HOW DOES AEROSEAL FIXES DUCT LEAKS?
WHAT IS AEROSEAL AND HOW DOES IT SOLVE YOUR INDOOR ALLERGY PROBLEMS?
Aeroseal is a duct sealing process developed & patented by the US Dept. Of Energy & Environmental Protection Agency to combat wasted energy, poor air distribution & indoor air quality (IAQ) problems caused by air duct leakage. These problem are typically blind to most homeowners who have come to accept excess dust, uneven cooling or heating of rooms, & IAQ symptoms associated with “sick home syndrome” as normal, not connecting these problems as the result of leaky ducts. Because most duct work is concealed in walls & other hard to get places until Aeroseal there was no cost effective way to seal existing duct work in homes. Aeroseal works from the inside using a non-toxic aerosol process that seals only the gaps & cracks reducing leakage, in many cases, over 90%.
Via – AEROSEAL DUCT SEALING
CONSIDER THIS THOUGHT WHEN PLANNING TO APPLY AN AEROSEAL DUCT SEALING
- About 50% of the average home’s utility bill is spent on heating and air conditioning.
- On average, 30 cents of every $1 spent on heating and cooling a home disappears into thin air due to leaky ducts.
- 25% to 60% of heated and cooled air doesn’t make it to their intended rooms.
- Duct leakage in homes costs homeowners $25 billion a year in utility costs.
Via – Aeroseal ® Duct Sealing
If you have questions in mind you may download this Q and A document:
WHAT ARE THE COMMON ISSUES YOU ARE GOING TO FACE WHEN HAVE A DUCT LEAK?
- Uneven heating – When conditioned air is lost through holes in your ductwork, it makes it much more difficult for a room to reach and even stay at your ideal temperature.
- Increased costs – If your ductwork is leaking, you are allowing the conditioned air to leak out AND allowing unconditioned air to come in. This forces your heating or cooling system to work harder and longer to bring your home or business to a comfortable temperature.
- Excess humidity – When an air duct leaks in your attic or crawl space, it pulls in humid, dirty air. This air promotes mold growth, which causes problems with allergies and asthma.
- Excess energy use – Leaky ductwork forces your HVAC system to work harder and wear out sooner—costing you yet more money!
SO HOW DOES AEROSEAL DUCT SEALING REALLY WORKS?
When the computerized Aeroseal process begins, all supply registers are removed and foam plugs are installed in their place. An access hole is cut into the supply- or return-air plenum and a temporary collar is attached. The air-conditioning coil, fan, and furnace are temporarily blocked with a foam plug so that sealant particles produced by the machine will not find their way into the equipment. The Aeroseal injection machine is then connected to the duct system using a long, flexible plastic tube (see Figure 1). Larger commercial buildings will likely require the simultaneous use of multiple Aeroseal injection machines to effectively seal the ducts.
Figure 1: Duct connection from plenum to Aeroseal machine
An inflatable plastic tube is installed from the Aeroseal machine to the collar at the new plenum opening.
Via – Duct Sealing
THE BENEFITS OF AEROSEAL DUCT SEALING
There are numerous benefits associated with an air-tight duct system including:
- Enhanced Comfort: A complete seal of the ductwork will help solve problems associated with uneven temperatures in different rooms. Equipment matched with a properly functioning air distribution system will also provide superior humidity control.
- Better Efficiency: Ductwork with significant leakage can cause heating and cooling utility bills to skyrocket. Applying the Aeroseal system to your duct network will pay for itself through lower monthly power and fuel costs. In many instances, a new HVAC system can be downsized because the air leakage has been eliminated. Equipment with a lower capacity costs less to purchase and install.
- Improved Indoor Air Quality: Negative pressure leaks allow chemicals, dust and fiberglass to enter your home on a continuous basis. Those with existing respiratory conditions are particularly vulnerable. Duct sealing improves IAQ by eliminating the source of the contaminants that circulate throughout your home.
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- 5 Facts About Indoor Air Pollution
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