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 2x6 construction
Reviewed by 1 customer
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Comments about PBF4 7" Expansion Ceiling Grille & Housing w/ Fluorescent Light, Uses 4" Duct:
Discret looks, not as imposing as ceiling mount fans with light
A bit expensive
Only negative is for imports to Canada, I would have liked to have other choice than UPS, they have to most expensive custom broking fees. USPS is much cheaper and as reliable.