Hon&Guan Inline Duct Fan 760 CFM, 8 Inch Inline Fan with Damper

Upgrade design The 8 inch damper has two new inwardly recessed ribs on the top and bottom, an increase in thickness to 0.6mm, and 3 springs instead of 2, ensuring that the product is more robust and less prone to damage., Material The 8'' backdraft damper and the flap leaves 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, Installation method The 8 inch duct damper has an opening of 200 mm and a length of 88 mm. When installed horizontally, the springs should be positioned horizontally to allow for optimal opening and closing,Powerful and Silent Powerful and Silent Inline Exhaust Fan： The 8 inch exhaust fan mixed flow design combined with a EC motor for quiet and energy efficient performance. The energy efficiency of 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 duct fan, durable plastic housing Ideal for long duct runs, suitable for air temperatures from -4℉ to 140℉.The junction box is bulit in sealing ring,protcetion class is IP44