Whether you're building a new home with a master luxury bath or replacing an old, noisy bath fan, the MS Series is an impressive choice with contemporary style. A rugged galvanized steel housing contains a powerful ball-bearing motor and a balanced, forward-curved blower wheel to efficiently ventilate your space and reduce moisture or odors while offering an exceptionally quiet performance. Our bath fan uses a side tab mounting installation method and features a plastic discharge collar with backdraft damper for easy attachment to a 4 in. diameter duct. Add a radiation damper (NXMRD) to meet local codes for protection against instances of heat or fire.