TinnerFlow™2nd YearAirflow, TAB, Startup & TestingCheck first
Turning vanes steer air through a sharp elbow. If the vane profile is backward, the air hits the wrong side and creates turbulence instead of smoothing the turn.
Ask a jobsite questionBack to Airflow, TAB, Startup & Testing
The journeyman asks you to field-assemble the internal turning vanes into a rectangular 90^\circ elbow on the ground. You slide the vane track into the side rails backward, facing the hollow cups away from the incoming airflow.
Turning vanes steer air through a sharp elbow. If the vane profile is backward, the air hits the wrong side and creates turbulence instead of smoothing the turn. The likely recovery is to check the condition, correct prep/setup if it is within your assignment, and bring the foreman clean information before the work creates rework overhead.
Use this as training guidance. Foreman direction, approved drawings, project specs, manufacturer instructions, employer safety policy, and AHJ/code requirements always control the final answer.