It can be connected to duct so the air may be exhausted out of the house. It also has a built-in back draft shutter (a clear plastic flap at the back) to stop warm air escaping or external air coming in through the fan.
Universal Fans | Fan & Ventilation Wholesaler
Universal Fans is a family business that has been specialising in ceiling fans, exhaust fans and other ventilation solutions for over 20 years. We carry a large range of quality products and can source ...