Fmi Products Blower Heater Manual Fan Kit BK Manual control, variable speed blower Squirrel cage design with magnetic attachment Fits all models: Circulating Wood Burning, B-Vent, Direct vent model fireplaces and vent free, Cir Comfort Glow, Comfort Flame, Desa, Design Dynamics, FMI, Vanguard, Vantage Hearth