Does any vendor make roof vents whose vent openings can be shut from inside
Our residential roof is a 6/12 sloped roof with composite tiles. We have
four exit vents on the sloping roof, which have rectangular cut outs in the
roof about 15" x 6" dimension. There is a sheet metal cover on these and
they slop down to guard against rain, with vent opening on the down side.
Recently we installed an attic ventilation fan on top of the roof that
replaces one of these vents. The problem is this fan is pushing air out
the attic, but air is rushing back in through the other three exit vents.
The air coming through those vents is hot air from the roof, so it just
cycles hot air in and out of the attic.
We could just tape off the three remaining vents, but I would really prefer
to find a replacement vent whose louvered opening could be dialed to
different levels of open. Does such a product exist?