Siding or plywood blocks the back of a fresh-air intake louver
A louver needs an open air path behind it. If another trade covers the opening, stop the cover-up and get the obstruction removed or redesigned before startup.
Do not assume an exterior louver is functional just because the face looks installed.
Check
Look through the louver and confirm the back side is open.
Check whether the bird screen is pressed against plywood, paneling, or cladding.
Confirm the active louver area from the mechanical drawing/submittal.
Photograph the blocked condition before anyone hides it.
Hold startup until the opening is cleared and protected.
Steps
Look through the louver and confirm the back side is open.
Check whether the bird screen is pressed against plywood, paneling, or cladding.
Confirm the active louver area from the mechanical drawing/submittal.
Photograph the blocked condition before anyone hides it.
Hold startup until the opening is cleared and protected.
Say this to your foreman
The intake louver at [location] is blocked behind the bird screen by [material/trade]. I verified the face is not open to the plenum. Do you want this held for the GC/siding crew to cut the opening clear?