Register Booster Fan Plus with Built-In Thermostat, Brown

The Cyclone Automatic Booster Fan helps to improve energy efficiency by boosting idle air outward into the rooms that need it most. It turns on and off automatically with the furnace or central air conditioning, making every room in the home equally comfortable at the tempurature you set. The booster fan fits into either a 3 x 10 inch or 4 x 10 inch register slot, providing comfortable, even airflow throughout the home. The Cyclone Booster Fan Plus helps to save energy and money, just set it and forget it!