DFD-LP is the only low-profile, integral-frame-sleeve, high-performance dynamic fire damper in the industry. Features of the one-and-a-half-hour-rated, single-aerodynamic-blade damper include the easiest-to-reset fuse link in the industry and galvanized-steel construction. DFD-LP is rated for 4,000 fpm and a standard static pressure of 4 in. wg, regardless of size. DFD-LP is rated for dual-direction airflow and can be installed vertically in walls or horizontally in masonry floors up to 8 in. deep. Weighing approximately 4 lb per square foot, it offers a fast single-side mounting angle, easy-opening crank lever, and external blade-position indicator.