Aftermarket Harman #4-21-02524 convection and distribution blower for Harman F200 Exception. Replaces noisey, defective or worn out blower with a 100% ball bearing, Class H insulated blower motor. Replaces older part #3-21-02524 Please consult the compatibility guide below to ensure fitment. This blower is constructed of high grade materials and is engineered to operate smoothly, efficiently and last a long time. If you’re installing a blower for the first time, a blower kit may be required. Replacement blowers are intended to replace worn or defective blowers and do not include the components of a full blower kit. This blower may be used as a universal replacement blower, so please review dimensions before purchasing. For more information on the benefits of ball bearing blowers, read our How Does a Fireplace Blower Work?