High quality aftermarket ComfortBilt Pellet Stove Replacement Exhaust Fan With Gasket. The purpose of this fan is to expel hot exhaust gasses from the stove. It also provides the necessary airflow through the unit for proper combustion and creates a negative pressure inside the stove, pulling fresh air into the unit. On some older units the mounting plate may be smaller than the original one. Unplug the power from the unit. Remove the side panel closest to the combustion blower. Disconnect the 3 wires running to the motor. Pay special attention to the location of the yellow and green ground wire. Remove the 4 wing nuts holding the mounting plate in place. Gently pull out the motor & scrape away any gasket material that may be left sticking to the housing. Install the new motor. Make sure it seats tightly against the housing. Be careful not to damage the fan blade when setting the blower in place. Reinstall the 4 wingnuts. Reconnect the 3 wires to the blower. Make sure the yellow and green ground wire is connected to the proper spot on the motor. Reinstall the side panel and plug in the unit. Benefits of Adding a Fireplace Blower. Improves fireplace efficiency by as much as 80%. Helps reduce costly energy bills. Heats large rooms effectively. Installs quickly and easily. L x W x H. Blower, Motor & Bearing. Included Velcro, tape and noise reduction padding. Noise Reduction Padding & Velcro. HB21, HB22, HB22i, HB22N, HB50, HB50GC, HB61. Listing and template services provided by inkFrog.