Backdraft And Gravity Dampers

Which way does airflow run for this backdraft damper?

I'm checking backdraft and gravity dampers at [location]. I found Installed backward so it never opens/closes. Which way does airflow run for this backdraft damper?

Airflow, Noise, Vibration & TAB 2nd Year BLUE

Stop if

Hold point on backdraft and gravity dampers: I have the location, photo, drawing/detail/spec section, and what I checked. Who should verify before this gets cut, drilled, sealed, supported, connected, controlled, or covered?

Watch out

Paint/obstruct the blades

Check

room/grid/area
photo of condition
drawing/detail/spec/submittal
what I already checked
what is blocking progress

Say this to your foreman

14605 backdraft and gravity dampers dampers blue 2 which way does airflow run for this backdraft damper? i'm checking backdraft and gravity dampers at [location]. i found installed backward so it never opens/closes. which way does airflow run for this backdraft damper? backdraft damper backdraft damper, gravity damper, relief damper