At Alpha Weatherization, we provide duct leakage testing services that help homeowners, builders, and property managers across Chicagoland ensure their HVAC systems operate efficiently and effectively. Leaky ducts are one of the most common causes of wasted energy, uneven temperatures, and poor indoor air quality. Our testing process identifies exactly where air is escaping within your duct system—so you can make targeted improvements that restore comfort, reduce costs, and meet local energy code requirements.
Your ductwork is the pathway that delivers heated or cooled air throughout your building. But even small gaps, cracks, or loose connections can lead to significant energy losses. In some homes, as much as 20–30% of conditioned air leaks out before it ever reaches the living space. That means higher utility bills, added strain on HVAC equipment, and rooms that never feel quite right. Alpha Weatherization’s professional duct leakage testing gives you the data you need to fix these issues at the source, improving both comfort and performance.
What Is Duct Leakage Testing?
Duct leakage testing measures how much air escapes from your HVAC ductwork when it’s pressurized. Using specialized equipment, we seal off registers and use a calibrated fan—known as a duct blaster—to pressurize the duct system. By tracking the airflow needed to maintain a set pressure, we can calculate the amount of leakage in cubic feet per minute (CFM).
From there, we identify problem areas within the duct network, such as disconnected joints, unsealed seams, or holes caused by wear or poor installation. The test provides a precise measurement of how airtight your duct system is—and, more importantly, shows how much efficiency you’re losing due to leaks.
Our Proven Testing Process
Alpha Weatherization follows a consistent, detailed testing process to ensure accurate results and clear, actionable insights.
1. Preparation and Inspection
Before testing begins, our team inspects the duct system to ensure it’s clean, accessible, and ready for diagnostics. We close or seal all registers and grills to isolate the duct network from the rest of the building. We also verify that the HVAC system is off and all vents are properly connected.
2. Pressurization and Data Collection
Next, we attach a calibrated duct blaster fan to one of the main registers or the air handler. The fan pressurizes the ducts to a standardized level (typically 25 Pascals), and our instruments record the airflow required to maintain that pressure. This data tells us exactly how much air is leaking from the duct system.
3. Leak Detection and Diagnostics
Using smoke pencils, pressure mapping, and infrared tools, we identify the specific areas where air is escaping. These could include attic ducts, crawl space runs, or behind-wall connections that are otherwise invisible.
4. Reporting and Recommendations
Once testing is complete, we provide a comprehensive report that details the measured leakage, compares it to energy code requirements, and outlines practical steps for sealing and improving system performance. If desired, our team can also perform duct sealing services to immediately address the issues discovered.
The Benefits of Duct Leakage Testing
A properly sealed duct system delivers comfort and efficiency you can feel. With Alpha Weatherization’s testing, you’ll gain:
- Improved energy efficiency by reducing conditioned air loss
- Lower heating and cooling bills through optimal system performance
- More consistent temperatures and balanced airflow throughout the building
- Cleaner indoor air by preventing dust and pollutants from entering the ducts
- Longer HVAC system life due to reduced strain and wear
- Code compliance verification for new construction and energy rebate programs
For homeowners, duct leakage testing is a smart way to uncover hidden inefficiencies that drive up energy costs. For builders and remodelers, it provides essential documentation to demonstrate compliance with Chicagoland’s energy conservation standards.
Why Chicagoland Trusts Alpha Weatherization
Alpha Weatherization is Chicagoland’s trusted partner in building performance and energy-efficient construction. Our technicians combine technical precision with real-world experience to deliver accurate, meaningful results. We understand how HVAC systems interact with the rest of the building envelope, so our testing doesn’t just reveal leaks—it provides insight into how to fix them for lasting efficiency.
We take pride in helping our community reduce energy waste and improve indoor comfort through professional diagnostics and honest recommendations. Whether you’re upgrading a home, managing a commercial facility, or verifying a new build, Alpha Weatherization brings expertise, transparency, and craftsmanship to every project.
Test, Seal, and Save
If you suspect your HVAC system isn’t performing as it should—or if you need official test results for code compliance—Alpha Weatherization is ready to help. Our duct leakage testing services provide the clarity you need to make informed improvements and ensure your system operates at peak efficiency.
Contact us today to schedule your test and discover how our Chicagoland experts can help you improve performance, comfort, and energy savings through precise duct diagnostics and professional sealing.
