This is a motor only and will fit into the existing housing of your stove or insert. Early versions of this motor were variable speed and would have had four wires; Red, Blue White, and Black. Harman always wired this blower for maximum output at line voltage using ONLY the Black and White wires. Requires two (2) 1/4″ female wire terminals (not included) to be crimped to the wire leads at the time of installation.
Harman Product Bulletin: March 15, 2011
The replacement blowers for the Super Magnum Stoker, Invincible, and Accentra pellet inserts are now one-speed blowers. Previously these replacement blowers were three-speed with two speeds made inactive. (Red and Blue not connected) All production models beginning with serial number 008600509 for the Super Magnum Stoker and serial number 008248445 for the Accentra pellet insert have been changed to the one-speed blower. This new wiring is invisible to the consumer since it still only operates at one speed like it always had.