With a new ridge vent installed, I am wondering if these old vents need to be removed? They're plastic covers over a square hole cut in to the attic plywood.
Just curious if it will interfere with the air flow; I know I've read some people say gable vents should not be paired with ridge vents. For some reason, the roofer removed the old vents on the other side of the house, but left these ones in.
Adding additional photo to show where the ridge is in relation to the old vents. You can see the old vents in the top right on the back side of the house.