If you need more than two ventilation points in a large bath simply add an extra Fantech Expansion Grille to Fantech's Dual Grille units. Fits between 2x8 construction
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Q:Can this be installed in a small half-bathroom ceiling with the vent out to a wall cap? And what is the sones rating on this fan?
A:The PBV6 can be used for that application, however it is only a housing, no fan is included.