Aeroseal Duct Sealing in Evanston, IL

Sealing the Hidden Leaks in Your Evanston Duct System

Consider a two-story Evanston home where the upstairs bedrooms never quite reach the temperature set on the thermostat. The furnace runs, the blower pushes air, and yet the rooms furthest from the equipment stay cold in winter and stuffy in summer. Energy bills climb, dust settles faster than it should, and no amount of thermostat adjustment seems to solve the problem. In many cases the culprit is not the furnace or air conditioner at all. It is the ductwork, quietly leaking conditioned air into attics, crawl spaces, and wall cavities where it does no good for anyone.

Aeroseal duct sealing addresses this problem from the inside out. Rather than crawling through your home to hand-seal every accessible joint, Aeroseal uses an aerosolized sealant that travels through the duct system and bonds directly to the edges of leaks. At All Temp Heating & Air Conditioning, we offer this technology to homeowners who want measurable improvements in comfort, efficiency, and indoor air quality without tearing open walls and ceilings.

How the Aeroseal Process Actually Works

Many homeowners are surprised to learn that duct leaks can be sealed without direct physical access to the ducts. The Aeroseal method works by pressurizing the duct system after temporarily blocking the registers and grilles. A non-toxic sealant, suspended in the moving air as tiny particles, is then introduced into the system. As the pressurized air escapes through gaps and cracks, the sealant particles collect at the edges of those openings and gradually build up until the leak closes completely.

The entire procedure is computer-monitored. Before we begin, we measure the total leakage of your system so we have a baseline number. As the sealing progresses, real-time data shows the leakage dropping. When the process is complete, we provide a report comparing the before and after measurements so you can see exactly how much tighter your ductwork has become. This documentation is one of the reasons the method appeals to homeowners who want proof, not promises.

A typical sealing session in an Evanston home follows a clear sequence:

• System evaluation: We inspect the ductwork, register locations, and equipment to confirm the system is a good candidate and to identify any large gaps that should be repaired by hand first.
• Preparation and protection: We cover registers, protect the furnace and coil, and isolate the duct system so the sealant travels only where it should.
• Baseline measurement: We record the existing leakage rate to establish a starting point for the results report.
• Sealing: The aerosolized sealant is circulated through the pressurized ducts, closing leaks up to roughly 5/8 of an inch across.
• Verification: We measure again, restore the registers, and confirm the system is operating correctly before we leave.

Why Duct Leakage Matters More Than Most People Expect

A common question we hear is whether a small amount of duct leakage really makes a meaningful difference. The answer is that it usually does. Studies of residential duct systems routinely find that 20 to 30 percent of the air moving through the ducts escapes before it reaches the intended room. For an Evanston household, that means a significant share of the money spent heating and cooling the home is quite literally leaking into unconditioned spaces.

Leaky ducts create problems beyond wasted energy. When supply ducts leak, rooms feel uneven, with some spaces overheating while others stay cold. When return ducts leak, they can pull air from attics, basements, and crawl spaces, dragging dust, humidity, and odors into the living areas. This is why homeowners with sealed ductwork often report that their homes stay cleaner and feel fresher after the work is done. Sealing the duct system helps your air purifiers and filters do their job, because the air is actually traveling through the intended path instead of bypassing it.

There is also a comfort dimension tied to the equipment itself. When a furnace or air conditioner has to run longer to compensate for lost air, it experiences more wear over time. Properly sealed ducts reduce that strain, which supports the longevity of the equipment we install and service. For families who have invested in quality heating and cooling systems, protecting that investment is a strong reason to seal the delivery network that connects it all together.

Situations Where Aeroseal Delivers the Most Value

Aeroseal is not a one-size-fits-all remedy, but it fits a wide range of common circumstances. In Evanston, where housing stock includes everything from century-old homes to newer construction, duct systems vary widely in age and condition. We frequently recommend duct sealing in the following situations:

1. Uneven room temperatures: When certain rooms are consistently too hot or too cold, leaking ducts are often to blame for the imbalance.
2. High energy bills: Households paying more than expected for heating and cooling often have hidden leakage bleeding conditioned air away.
3. Excess dust and allergens: Homes that seem to accumulate dust quickly may be pulling contaminated air through leaky return ducts.
4. Older homes with hard-to-reach ductwork: When ducts run through finished walls and ceilings, sealing from the inside avoids invasive demolition.
5. New equipment installations: Pairing a new furnace or air conditioner with sealed ducts helps the system perform at its rated efficiency.

These scenarios show up again and again across the neighborhoods we serve. A family that recently upgraded to a high-efficiency furnace may find their comfort improves dramatically once the duct leakage that undermined the old system is finally corrected. Another household struggling with a musty smell in the summer may trace the issue to a return duct pulling humid air from a crawl space, a problem that sealing resolves neatly.

Technical Details That Shape the Results

The performance of an Aeroseal treatment depends on several technical factors. The sealant is designed to bridge gaps up to about 5/8 of an inch, so extremely large openings or disconnected duct sections should be repaired mechanically first. During the process, we monitor duct pressure carefully to make sure the sealant is being deposited where it is needed and not overloading any single section. The sealant itself cures into a durable seal that is engineered to remain effective for many years.

It is also worth understanding that duct sealing works best as part of a whole-system approach. If a return is undersized or a supply run is crushed, sealing alone will not correct airflow problems rooted in the duct design. This is why we evaluate the complete system before recommending the service. When the duct layout is sound and the leakage is the primary issue, the improvement in delivered airflow and temperature balance is often significant and immediately noticeable.

Why Evanston Homeowners Choose All Temp Heating & Air Conditioning

All Temp Chicago Heating & Air Conditioning has become the first choice for tens of thousands of families throughout the Chicago and suburban areas, and that trust is built on doing careful, thorough work. As a family owned and operated company, we sell and service quality furnaces, air conditioning, boilers, air purifiers, humidifiers, ventilation, and water heaters, and duct sealing complements every one of those systems by making sure the conditioned air actually reaches your rooms.

Our courteous, fast, and friendly staff treats each home with respect, explaining the process clearly and sharing the before and after measurements so you understand exactly what the service accomplished. We are proud to be one of Bryant’s highest-rated dealers in the nation, and we bring that same standard of care to duct sealing that we bring to equipment installation, tune-ups, and repairs. Serving Evanston and the surrounding communities of Chicago, Bolingbrook, Skokie, Evanston, Lincolnwood, Morton Grove, Niles, Park Ridge, Woodridge, and Darien, IL, we are ready to help you get more comfort and efficiency out of the system you already own. Contact All Temp Heating & Air Conditioning to schedule an evaluation and find out whether Aeroseal duct sealing is right for your home.