Hon&Guan Inline Duct Fan 469 CFM, 6 inch inline fan with 6 Inch Backdraft Damper

Upgrade design The 6 inch damper on both sides of the top and bottom of the two new concave inward pressure rib, and increase the thickness to 0.6mm,to ensure that the product is more solid, not easy to damage., Quality Material The 6 inch backdraft damper is made of a galvanized steel to withstand temperatures up to 140°F, the axis are made of aluminum, while the spring are made of carbon steel. Rugged and corrosion-resistant to keep you venting smoothly, Lightweight valve wings The valve wings open under the pressure created by the airflow; when the air flows in the opposite direction, it is automatically closed under the action of the spring, so as to cut off the flow. Rubber ring ensure 100% closure and quiet closing.,Powerful and Silent Inline Exhaust Fan：The 6 inch inline fan mixed flow design combined with a EC motor for quiet and energy efficient performance. The EC motor can save up to 50% of energy costs. garage exhaust fan with variable speed controller, can precisely optimize the fan's speed and low energy,High Quality Material：Booster fan durable plastic housing Ideal for long duct runs, suitable for air temperatures from -4℉ to 140℉.The junction box is built in sealing ring,protcetion class is IP44