Ventilation fan, ENERGY STAR®, QXTE series, Nearly silent operation, 0.6 sones, Rugged, 26 gauge galvanized steel housing, Polymeric grille, Low RPM for quiet operation, Plug-in, permanently lubricated motor engineered for continuous operation, 6 inch ducting for superior performance, Fits in 2x8 inch construction, 10-3/8(D)x11-1/4(W)x7-5/8(H) inch housing.