TinnerFlow™4th YearDuct Systems
Avoid elbows, transitions, or obstructions within 3-5 equivalent diameters of the fan discharge. System effect at the discharge reduces fan performance si…
Avoid elbows, transitions, or obstructions within 3-5 equivalent diameters of the fan discharge. System effect at the discharge reduces fan performance significantly — often 15-30%. If constraints force a close fitting, add the system effect loss to the fan selection.
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.