Same German made, top quality motor as the FX series, except the housing is galvanized steel with baked on powder coat finish. Powered by external rotor motorized impeller for excellent heat dissipation. Automatic reset thermal overload protection. Permanently sealed ball bearings. External wiring box for ease of connection. Tested and approved by UL and CSA, FG Series fans are suitable for air stream temperatures up to 140 F. 100% speed controllable. 5 Year Factory Warranty. Power cord & strain relief included, but not wired in.