Benefits of Adding a Fireplace Blower. Improves fireplace efficiency by as much as 80%. Helps reduce costly energy bills. Heats large rooms effectively. Installs quickly and easily. 180 CFM ball bearing blower assembly. Pre-wired for easy installation. Rheostat variable speed controller. Magnetic automatic thermostat sensor. Rubber isolation feet for noise reduction. Heavy duty grounded 3 prong power cord. 3 to 2 prong outlet adapter.