Seal In The Savings With Aeroseal

Duct Sealing is a patented, breakthrough technology that tackles house leaks from the inside out. Aeroseal software allows the technician to accurately measure the duct leakage in residential homes and commercial buildings. The Aeroseal process puts escaping air under pressure and causes polymer particles to stick first to the edges of a leak, then to each other until the leak is closed.

What questions should I ask my Aeroseal contractor?

​If you are getting a cost estimate for Aeroseal, here are a list of questions you should ask them to ensure you are getting the right duct sealing method for your house for the most cost effective price.

1. Is my ductwork completely accessible? If not, what parts are inaccessible? If your ductwork is completely accessible then YOU DO NOT NEED AEROSEAL.  A manual sealing IS MORE EFFECTIVE THAN AEROSEAL.  
2. Where did you find leaks that Aeroseal will not seal?  You want to know the rep did a through check of your ductwork and will communicate that to the Aeroseal technicians.  Do not rely on the Aeroseal technicians to find the larger leaks.  The rep should also let you know that all the drywall gap between the boot and drywall will be sealed by hand also.  The drywall gap between the boot and drywall will not be sealed by Aeroseal.​
3. How will the return ducts be sealed?  The return ductwork should be sealed by hand with mastic.  Many companies do not touch the return but sealing the leakage on the return is equally as important as the supply duct leakage.

Can Aeroseal fix my hot or cold rooms?

​Despite what companies say, hot and cold rooms are rarely solved with a single solution approach.  We have seen homeowners come out with the short end of the stick again and again from companies promising that Aerosealing your ductwork will fix comfort problems.  The only way to know the root causes of comfort problems is to perform an energy audit and test your home first.  Many companies that offer Aeroseal do not perform a good energy audit with the homeowner's interest in mind.  Your home may have duct leakage but if your insulation is installed wrong, ductwork is sized wrong and airflow imbalanced, Aerosealing can make the hot rooms hotter and cold rooms colder.  ​How much will Aeroseal save me in energy costs?When looking at how much energy savings you can expect with Aeroseal or ductwork sealing in general, you must keep in mind where energy is being used in your home.  In Arizona, half of our energy use comes from air conditioning in the summer.  An energy auditor can take a look at your energy bills and if an audit is performed, put all the data into an energy model and heat load calculation to estimate how much savings you can expect to see.

What's the difference between Aeroseal and manual ductwork sealing?

Companies that primary promote Aeroseal will say that Aeroseal is superior to manual ductwork sealing but we don't believe that is the case.  Manual ductwork sealing can be applied thicker than Aerosealing and seals larger holes bigger than 5/8".​How long does Aeroseal last? Aeroseal is guaranteed for 10 years.  Mastic ductwork sealing is guarenteed for 50 years.  I believe both applications can last for 50 plus years.  

When should Aerosealing be used and when is manual ductwork sealing recommended?
Manual ductwork should be used:

• Within the first 3 feet of the air handler, furnace or package unit
• Gaps larger than 5/8".  An energy auditor will be able to identify larger holes with a blower door test.  It is typically not a good idea to rely on the Aeroseal technicians to find the larger holes since they typically just "blow and go."
• When the ductwork is 100% accessible. 
• Manual ductwork sealing can be applied thicker, which is better than the thin coat of glue Aeroseal leaves.

Aeroseal the ductwork should be used:

• When the ductwork is not accessible for rectangular sheet metal ductwork in attics, walls and crawlspaces.
• The the ductwork travels between floor cavities and is inaccessible.
• The ductwork travels to an inaccessible part of the house (just because a large or inexperienced technician can't reach an area in the attic, does not mean it is inaccessible).
• The ductwork is extensively wrapped in metal wires and insulation.

Is the sealant used in Aeroseal safe? 

Sealant used by Aeroseal is a water based, non-toxic and has been used in hospitals, surgery centers, and government institutions. UL approvals for UL 1381 for aerosol based technology – UL 723 for smoke and flame rating of 0 and UL 181 for mold growth. Primary component is Vinyl Acetate Polymer, used in water based paints, hair spray, and chewing gum. The primary component of Aeroseal has NO OSHA maximum VOC exposure limit.

The Aeroseal 6 Step Process

1. Wall registers are covered in order for air to escape only through the leaks.
2. Sealant is injected into the ducts for about an hour.
3. Small aeroseal particles are kept suspended in the airflow by continuous air movement.
4. As the air stream makes a sharp turn to exit through a leak, the particles collide with and adhere to the leak edges.
5. Ducts are sealed with only 1-2oz. of residual sealant material remaining in the ducts.
6. A computer-generated analysis summarizing your home’s or buildings amount of leakage is generated, providing verification of success of the process.

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