Fasco Convection Fan (Room Air Blower). This part is a variable speed motor with two wires, a ground, and has 4 holes on the mounting plate. 

Compatible with some models of the following brands: Carolina Stove, Earth Stove, England, Heat N Glo, National Steel, National Stoveworks, Orville Products, Peacock Stove, Russo Woodstove, Steelcrafters, Vestal Manufacturing

This is Fasco Part # B45227