Harman Accentra FS & Insert Pellet Exhaust Combustion Motor - 3-21-08639 . Ultra Quiet Engineering - If you want Peace and Quiet with Low Vibration…You found the right motor. This motor is so quiet; you won’t know your stove is on. Estimated Lifespan: 15-20 years. Fasco uses the highest standards of engineering with parts calibrated within 1/10,000th of an inch. The room for error is so small is has to be checked using a microscope. Your new motor is designed for Variable Speed which requires high quality electronic components not included in other motors. High temperature rubber bushings and washers are used to Damper Vibration. Go Green. In accord with new environmental standards your new motor is more efficient so it cost less to run. Wiring - Your new motor may have a electrical plug that is different from you old motor. Cut the new plug off and splice the wires to the old wiring using your choice of electrical connector. It doesn't matter which wire goes to which as long as they are connected.