Fantech CVS-275A Multi-Port Exhaust Fan, 245 CFM

Galvanized steel housing . External rotor motor with backward-curved centrifugal fan wheel constructed of high-density polyamide, easily removable from housing for service without disturbing the installation . Internal scroll for maximum air performance . Well-designed inlet venturi for optimum efficiency . Permanently lubricated sealed ball bearings . 100% speed controllable for highly efficient and economical airflow . Suitable for airstream temperatures up to 140° F . Tested and approved by UL and CSA (or equals) . Five-year warranty