Air Leakage Testing Solved with Aeroseal by Hasman

Air Leakage Testing Solved with Aeroseal by Hasman

Ductwork leakage solved by Aeroseal

Leakage happens from every ductwork system and is accepted until the levels of leakage exceed specification rates. If air leakage testing tells you that your system is exceeding the maximum allowable leakage rate then the chances are that Aeroseal will be the fastest, most effective and least costly way to solve the problem, particularly if large portions of your ductwork are inaccessible.

What air leakage testing can tell you

Air leakage testing will tell you whether the leakage from your ductwork is within the allowable limits. Sometimes soapy water can be applied to the system during air leakage testing, to provide a visual indicator of where the leakage is taking place. However, it is virtually impossible, with most installed systems, to find all the leaks.

Walls, ceilings and other components of the building will no doubt restrict view of the ductwork. When it’s impossible to see, it is impossible to locate individual leaks and, in the past, it was all but impossible to fix them too. Aeroseal has changed that.

If you do find above acceptable levels of leakage during air leakage testing, don’t be overly concerned, or surprised. Leaks can happen for all kinds of reasons, such as damage in transit, manufacturer error, poor system design or poor installation. The good news is that Aeroseal makes it relatively simple to repair even impossible to identify leaks within a system.

How Aeroseal works

Traditional methods of sealing ductwork by hand were labour intensive and invasive. Ceilings had to be dismantled while leaks were searched for and fixed. Leaks could sit behind walls, unidentifiable. While this can still happen, we now have Aeroseal technology capable of sealing ductwork leakage from the inside.

Aeroseal is injected into the ductwork system, where it finds and seals points of leakage from the inside. Large areas can be treated at once, without the need for additional access points to be fitted. Dependent on the design of the system, up to 150 meters of ductwork could be sealed at the same time. This method comes with enormous time savings, versus traditional techniques.

Once in place, Aeroseal sealant is capable of withstanding 2000Pa of pressure and has an estimated lifetime of over 30 years (provided ductwork is not dismantled or cleaned with oxidising chemicals). Cured sealant is odourless and will withstand temperatures from -29C to +249C . Points of leakage up to 20mm across may be sealed, meaning system leakage can quickly and easily be reduced. This really is a revolutionary system!

Leakage is reduced on average by over 90%, allowing systems to meet design specification and be upgraded to higher classification.

Case studies

Here are two examples of how Aeroseal has allowed a system, in a setting that would have been impossible to fix so completely using traditional methods, to be upgraded to a higher classification.

In 2018, the ductwork system in a luxury office in Mayfair, London was leaking above allowable rates. Hasman applied Aeroseal, reducing the system’s leakage by 91.5% and producing leakage rates of class C, above the required class B rate.

Also in 2018, we Aerosealed the underfloor ductwork of a new build wedding barn in Costwolds. Air leakage testing had found leakage to be above the allowable rate. We reduced it by 80.1%, producing leakage rates of class C, above the building’s required rates of class A. that the reduction in leakage was under 90% suggested that there was a single leakage larger than 20mm and therefore unable to be repaired by Aeroseal but the job exceeded expectations regardless.