Nutone QTRN050F Bath Fan Builder Housing Pack,Lumtopia,QTRN050F" /> 0.4 sones 50 CFM; Nutone QTRN050F bath Fan Builder pack (1 pack) 50 CFM uses qtxrn000hf housing pack Hvi certified Grille shape: rectangular Requires separate purchase of qtxrn000hf to complete Fan