SkyTech GFK-4 Temperature Controlled 165 CFM Fireplace Blower Fan Kit with Speed Control Knob (FK-165-RT) Fireplace fan/blower kit with manual Rheostat speed control Exact replacement for GFK-4 fan kit; suitable for many products in the hearth industry Blower features 165 CFM (cubic feet per minute), timer for automatic control, magnetic mounting strips for noiseless operation Certified by ETL; Complies with CSA C22.2; UL listing 1004; 2 year manufacturer's warranty Includes: entire blower kit, manual Rheostat speed control, power adapter, & necessary wires