The BLOTMC blower is designed for use with vent-free fireplaces manufactured by Vermont Castings Group only. Installing a blower is both cost and energy efficient. It allows for the heat created in your vent free fireplace to be distributed throughout the room. This blower features a thermostatic on/off switch to automatically operate the blower at the set temperature. It can be used with or without a designated fireplace wall switch. It is for use with GCUF, MCUF and BUF 36/42 fireboxes.