Greenheck Extruded Backdraft Damper EM-40 manual

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Table of contents for the manual

  • Page 1

    Application and Design The EM-40 series is a horizontally mounted backdraft damper that is designed to allow vertical airflow down and prevent reverse airflow. The damper is opened by air pressure differential and closed by gravity. Standard models include adjustable counterbalance weights to assist closing. Ratings (See page 2 for specific limitat[...]

  • Page 2

    Specifications Backdraft dampers meeting the following specifications shall be furnished and installed where shown on plans and/or as described in schedules. Dampers shall consist of: heavy gauge 6063T5 extruded aluminum channel frame (0.125 in.[3.2mm] thick) with 3 1 Ú 8 in. (79mm) depth; blades from 0.070 in.(1.8mm) 6063T5 extruded aluminum; 3 /[...]