Backdraft And Gravity Dampers
Installed backward so it never opens/closes
Green / Field Check2ndBatch 5
What This Helps With
Installed backward so it never opens/closes
Apprentice words: backdraft damper
Trade terms: backdraft damper, gravity damper, relief damper
Check First
Airflow direction arrow and free swing
What Not To Do
Paint/obstruct the blades
What can go wrong: Mounting against airflow
Better Foreman Question
Which way does airflow run for this backdraft damper?
Verify With
Reference type: project drawings
Source to verify: Drawings
Safe wording: Direction-critical.