The FSD Series is a mixed flow centrifugal type exhaust/supply fans for moderate size ventilation applications were specifically designed to provide the high flow of axial designs plus the higher pressure, non-overloading characteristics of backward curved impellers. Motor bearings are a permanently sealed, self-lubricating ball type. The square design provides a larger discharge area than tubular centrifugal or vane axial fans, so outlet velocities are reduced for quieter operation. Features: Lightweight square design provides a larger discharge area and quieter operation Mixed flow ...

DBF 4XL is a duct booster fan designed for boosting air on demand. The product is equipped with a 5 feet cord, pressure-sensing switch that activates the fan once positive pressure is sensed in the duct line. The switch shuts the fan off when the pressure in the duct's normalized. The DBF 4XL features a galvanized metal housing, pressure-sensing switch and a 5 feet cord for 120V/1~ connection. Suitable for 4" ductwork.Performance certified by HVI; safety certified by ETL to UL507.

Fantech Inline 4" Centrifugal Duct Fan Metal Housing - 135 CFM Suitable for commercial ventilation and residential installations including kitchen range hood exhaust applications.

Fantech Inline 6" Centrifugal Duct Fan Metal Housing - 303 CFM Suitable for commercial ventilation and residential installations including kitchen range hood exhaust applications.

Fantech Inline Centrifugal 4" Duct Fan Molded Housing - 122 CFM Engineered thermoplastic resin for wet locations/outdoor use. Includes mounting bracket.