Cyclone Booster Fan Plus with Built-In Thermostat, Black

Maintain the perfect temperature in your home with this Booster Fan Plus. You can place this small fan into your vents to give you the airflow you need. For convenience, built-in thermostats let you know when to turn it on and off. Save energy throughout your whole home with this small but powerful fan.

• 45-degree angled blades circulate air through the entire room
• Fits 3 in. to 4 in. wide by 10 in. long ducts
• Temperature sensor enables automatic on/off function