Concentric Vs Eccentric Round Reducer

Concentric or eccentric here, and which side flat?

I'm checking concentric vs eccentric round reducer at [location]. I found Wrong type causes clearance or drainage/airflow issues. Concentric or eccentric here, and which side flat?

Round, Spiral & Oval Duct 2nd Year BLUE

Stop if

Hold point on concentric vs eccentric round reducer: 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

Assume orientation doesn't matter

Check

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

Say this to your foreman

14577 concentric vs eccentric round reducer round & spiral duct blue 2 concentric or eccentric here, and which side flat? i'm checking concentric vs eccentric round reducer at [location]. i found wrong type causes clearance or drainage/airflow issues. concentric or eccentric here, and which side flat? reducer reducer, concentric, eccentric, taper