The large outside flange helps to cover any unsightly holes, the integral louvres,allow good air flow whilst preventing most insects from entering
Secured by two screws (not supplied) either side of the vent
75mm Round louvered vent TAN. this vent has louveres .
(Free flow area is 550sqmm).
OD - 75mm.
Screw hole centres – 65mm.
CUT OUT – 55mm