Massachusetts and Rhode Island require Duct Leakage Testing for homes where ductwork is located outside the conditioned envelope. Energy Geeks performs certified testing that meets MA 780 CMR, Stretch Code, and RI IECC 2024 requirements.
Required Leakage Thresholds
Massachusetts (MA 780 CMR & Stretch Code)
Typical limits include:
- ≤ 4 CFM25 / 100 sq. ft. (when ducts are outside conditioned space)
- Leakage-to-exterior limits may also apply
Rhode Island (IECC 2024)
Statewide requirement:
- ≤ 4 CFM25 / 100 sq. ft. for new homes with external duct runs
Learn how leakage affects HERS Ratings:
Why Duct Leakage Matters
Documentation Provided for Officials
Energy Geeks delivers:
- CFM25 leakage results
- Pass/fail confirmation
- Testing conditions documentation
- Reports compatible with code inspections
- Integration with HERS modeling when required
See full workflow:
The HERS Rating Process
When Code Compliance Testing Is Required
- New residential construction
- HVAC system replacements
- Additions or renovations involving ducts
- Homes using HERS performance paths
Explore broader compliance topics:
Code Compliance in MA & RI
