This scheme defines the scope of the Infiltration & Duct Leakage certification to include specific
diagnostic testing and applied data from whole house infiltration and duct leakage testing. This
certification is not intended to be a whole house diagnostic, audit or assessment and consists of three
main components: whole house infiltration testing, total distribution system leakage, and distribution
leakage to the outside.
During this course, you will learn about:
• Construction Math
• Blower Door & Pressure Diagnostics
• Tightness Verification
• Duct Testing
• Duct Tightness Verification
2 hours of online learning followed by in-person training & exam.
• H4H provides all testing equipment.
• Registration fee includes training and testing.
Please review the Field Guide for the Infiltration and Duct Leakage (IDL) certification.
Candidates must take a field exam to become Infiltration and Duct Leakage certified.
Field exam: Hands-on field portion
Time limit: 1 ½ hours
Passing score: 85% or higher
Processing time for exam results: 2-4 weeks