Broan Exhaust fan

 
Features:
50 CFM, 4.0 Sones
Damper/duct connector fits 3" round duct
Torsion spring grille mounting - no tools necessary
Compact housing fits easily between ceiling joists or wall studs
Housing Dimension: 7-1/4"x7-1/2"x3-5/8"
Plastic Grille Dimension: 9-1/4"x9"