CSLB C-20 HVAC ContractorVentilation and Air DistributionEasy
For new residential construction in California, Title 24 duct leakage test results must be verified and documented by whom, and on which compliance form?
- AThe installing contractor, documented on form CF2R
- BThe local building inspector, documented on the permit card
- CThe manufacturer's representative, documented on the equipment warranty form
- DA certified HERS rater, documented on form CF3R
Show answer & explanationAnswer & explanation
Correct answer: D. A certified HERS rater, documented on form CF3R
Under Title 24, duct leakage testing is a field verification item that must be performed and documented by a certified HERS (Home Energy Rating System) rater on the CF3R verification form. The installing contractor completes the CF2R installation certificate, but independent third-party verification of duct leakage requires a HERS rater.
Why the other options are wrong
- A. CF2R is the installation certificate completed by the contractor, not the third-party verification form for duct leakage.
- B. Building inspectors verify code compliance generally but do not perform the specialized HERS duct leakage test.
- C. Manufacturers do not conduct field verification testing for Title 24 compliance.
HERS Verification & CF3R Form
Title 24 requires certain energy features, including duct leakage, to be field-verified by a certified HERS rater and documented on the CF3R compliance form, separate from the contractor's CF2R installation certificate.
- CF2R = installation certificate (contractor)
- CF3R = verification certificate (HERS rater)
- Duct leakage is a HERS-verified measure under Title 24
Memory trick: 'Contractor installs (CF2R), rater verifies (CF3R).'