When building a new home in Illinois, ensuring your HVAC system operates efficiently is crucial. One essential aspect of this is duct testing, which assesses the airtightness of your ductwork.
Understanding the state’s requirements can help you navigate the construction process and ensure compliance with energy codes. Let’s take a closer look at some of the requirements.
Understanding Duct Testing in Illinois
Duct testing measures the amount of air leakage in your home’s duct system. The Illinois Energy Conservation Code (IECC) mandates that all new homes undergo duct testing to verify that the ductwork is properly sealed and insulated. This testing is vital for maintaining energy efficiency, indoor air quality, and overall comfort.
Key Requirements for Duct Testing
When Testing Is Required
Duct testing is mandatory for all new construction homes in Illinois. If your ductwork passes through unconditioned spaces like attics, garages, or crawlspaces, it must be tested for air leakage. Even if the ducts are entirely within the conditioned space, testing may still be required under certain circumstances.
Testing Methodology
The standard method for duct testing involves using a calibrated fan to pressurize the duct system to a specified pressure (usually 25 Pascals). All supply and return registers are sealed during the test. The amount of air leakage is then measured to ensure it falls within acceptable limits
Leakage Limits
According to the 2021 IECC, the maximum allowable duct leakage is:
- 4.0 CFM per 100 square feet of conditioned floor area for ducts located outside the thermal envelope.
- 8.0 CFM per 100 square feet for ducts entirely within the thermal envelope
Testing Phases
Duct testing can occur at different stages of construction:
- Rough-In Test. Conducted before insulation and drywall are installed. This allows for easier access to ductwork and is ideal for identifying and sealing leaks early.
- Post-Construction Test. Performed after the home is completed. While this can identify leaks, it may be more challenging to access and seal them at this stage
Benefits of Duct Testing
- Enhanced Energy Efficiency. Properly sealed ducts prevent energy loss, leading to lower heating and cooling costs.
- Improved Indoor Air Quality. Sealing ducts can reduce the infiltration of dust, allergens, and pollutants into your living spaces.
- Increased Comfort. Balanced airflow ensures consistent temperatures throughout your home.
- Code Compliance. Meeting duct testing requirements is essential for obtaining necessary occupancy permits and certifications.
Duct testing is a critical component of building a new home in Illinois. By understanding and adhering to the state’s requirements, you can ensure your home’s HVAC system operates efficiently, providing comfort and energy savings for years to come. Always consult with a licensed professional to perform duct testing and address any issues promptly.
Trust Ensure Home Solutions for Expert Testing
At Ensure Home Solutions, we use advanced tools to provide accurate duct testing and customized recommendations for repair or sealing. Whether you’re concerned about your energy bills or want to improve the air quality in your home, we’re here to help you breathe easier and live more comfortably.
Contact us today to schedule your duct test and take the first step toward a healthier, more efficient home.
