Brackets included for wall or ceiling mount. Permanently lubricated sealed bearings. External rotor motor with automatic reset thermal overload protection. Suitable for airstream temperatures up to 140°F (60°C). 10 year warranty. ETL Listed. 4" to 12" duct diameters. From 220 to 1124 CFM. Aerodynamic design allowing more air flow. 100% speed controllable easing air flow adjustment.