How It Works

First, the certified technician will block all the primary openings of the duct system (supply and return registers) and place foam plugs in all of the openings. Next the technician will isolate the furnace from the ductwork and disconnect any equipment that cannot be exposed to the sealant particles. After this is done we’re ready to connect a plastic tube from the Aeroseal machine to the ductwork, take a pre-leakage test and we can start sealing. When the sealing begins heated particles of vinyl are atomized at the injection nozzle and pushed by a fan controlled by the computer. The ductwork builds pressure and the suspended particles attempt to escape out of all the crack and holes in the ductwork. When these particles accelerate through the holes they stick to the edges of the leak and build upon eachother until the hole is sealed. When sealing is complete the computer will calculate the remaining leakage and display the results.

In a nutshell, how does an Aeroseal air duct seal work?

1. Block off the registers with closed cell foam.
2. A Preseal test is done to measure the leakage as a baseline for measuring progress.
3. Begin Aeroseal Sealing Process
4. Pump Aeroseal into the duct system.
5. Since the air has no place to go except out through the leaks (the registers are blocked), the sealant material is deposited precisely at the air duct holes where leakage occurs.
6. A computer and sensors are used to measure and control the progress. The technology is patented from the University of California and the process is endorsed by the Environmental Protection Agency.
7. Postseal test to measure improvements.
8. Room airflow measurements to verify improvements.
9. Complete report that is printed on the spot to provide a record of improvements.