S & P 411030 30 Inch Gravity Damper For Roof Exhausters
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DescriptionThe 411030 gravity damper features a galvanized 2" deep frame with aluminum fins/blades.A damper provides effective backdraft protection and is easy to install. It is for use with horizontal mount exhaust application and is spring assisted, allowing the blades to open quickly. The leading edge of the louvers have a felt seal for quiet closing.An optional motor kit (411611) is available but is not for use in explosive or flammable areas or airflows. You cannot use a damper in a grease application.The 411030 is for use with DB, TXB-UL762 size 24.
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