AIRBLAZE T12, Universal Fireplace Blower Fan Kit 12 with Temperature and Speed Controller, for Lennox, Hearth Glo, Majestic, Rotom. A quiet blower fan kit with smart controls, designed to boost airflow coming from your fireplace. Being a standard size, it can replace blowers found in Lennox, Hearth Glo, Majestic, Rotom, and other fireplaces. Features a DC-motor controlled using PWM for a truly quiet and energy efficient performance. 12.6 x 4.0 x 3.6 in.