What is a Duct Blaster Test?

A duct blaster test measures how much air is leaking from a home’s HVAC duct system. At Green Thinking, we seal the registers and use specialized equipment to depressurize the ducts, identifying leaks at joints, connections, and gaps, particularly in unconditioned spaces like attics, garages, and crawlspaces.

For new construction, this test is often required by the IECC energy code to verify ductwork meets efficiency standards before final inspection. For existing homes, it helps uncover hidden duct leakage that can lead to uneven temperatures, high energy bills, poor indoor air quality, and added strain on HVAC equipment.

Why It Matters:

1. Code Compliance: Required by IECC for most new homes.

2. HVAC Performance: Leaky ducts reduce efficiency, increase runtime, and restrict airflow. Indoor

3. Air Quality: Return leaks can pull in dust, insulation, or moisture.

4. Comfort & Energy Use: Duct leaks create hot and cold spots while driving up bills.