FMI Thermal/Rheostat Blower Kit with Magnetic Attachment can be used with Circulating Wood Burning, B-Vent, Direct Vent Model Fireplaces and Vent Free Circulating Fireboxes, Comfort Glow, Comfort Flame, Desa, Design Dynamics, FMI, Vanguard, Vantage Hearth. This blower fan is thermostatically controlled to increase air flow allowing for better heat distribution. The unit automatically powers up and down to reach the desired temperature. Blower comes with a magnetic attachment and "squirrel cage" design. Maximize the efficiency of your FMI fireplace and circulate warm air through your home with a blower kit. FMI Thermal/Rheostat Blower Kit with Magnetic Attachment Features: * Thermostatically controlled Blower Fan with variable speeds * Blower Assembly with Speed Control and 6 foot Cord * Wire assembly, control knob, and lock nut