TinnerFlow™4th YearFabrication
When replacing duct on a retrofit or repair, identify the original gauge and construction class from the existing duct or the original as-built drawings.…
When replacing duct on a retrofit or repair, identify the original gauge and construction class from the existing duct or the original as-built drawings. Substituting lighter gauge or lower construction class can void warranties and fail inspection.
Do not hide, force, cover, or “make it work” if this affects safety, access, airflow, rated assemblies, supports, equipment, or inspection. Stop and verify the approved correction.