Greenheck has added two new models of stainless steel backdraft dampers to its backdraft damper line.
The SSNM-10 Series is horizontally mounted and allows vertical airflow up while preventing reverse airflow. The SSNM-30 Series is vertically mounted and allows horizontal airflow. Both are rated for pressure differential up to 2 in. wg. and velocities up to 2,500 fpm.