Duct leakage testing measures how much conditioned air escapes from your HVAC ductwork. Because ducts distribute heated and cooled air throughout your home, leakage reduces comfort, increases energy use, and can prevent compliance with MA & RI building codes.
Energy Geeks provides certified duct testing for builders, renovators, and homeowners.
How Duct Leakage Testing Works
We use:
- A calibrated duct fan
- A pressure gauge (manometer)
- Special sealing materials (to temporarily seal registers)
The system is pressurized to 25 Pascals, and leakage is measured as CFM25 — cubic feet per minute of duct leakage.
Learn how blower door testing works as well: What Is a Blower Door Test?
Why Duct Leakage Matters
Leaky ducts can quietly undermine a home’s performance by allowing conditioned air to escape before it reaches living spaces. This leads to higher energy bills, reduced comfort, and uneven temperatures from room to room. In some cases, duct leakage can also create negative pressure issues that affect airflow and indoor air quality. Together, these impacts reduce overall system efficiency and can result in lower HERS scores.
Explore the connection: Why Duct Leakage Matters for Your HERS Score
Code Requirements in MA & RI
Both states require duct testing when ducts are outside the conditioned space.
Details here: Duct Testing for Code Compliance
When Duct Testing Is Required
Duct testing is commonly required for new construction and during major HVAC replacements to verify system performance. It is also a standard component for homes pursuing a HERS Rating, Energy Star, or Zero Energy Ready Home certification. In many cases, completed duct testing is necessary to confirm incentive program eligibility and demonstrate compliance with performance requirements.
Learn about rebate connections: Mass Save & RI RNC Integration