BEST internal blowers provide exceptional performance and sound levels that are both quiet and gratifying.300 CFM @ 3.5 Sones (High), 100 CFM @ 0.3 Sones (Low).Duct Size: 8 round.Blower can be used in vertical or horizontal orientation.For use with IP29M, UP26M, UP27M, WP28M, WP29M.Thermal overload protected.
