Model DFDR-510 is a round fire damper for use in walls, floors, and partitions with fire-resistance ratings less than three hours. Dynamic-rated-fire dampers are in HVAC systems that remain operational in the event of a fire.

Model DFDR-510 is a round fire damper for use in walls, floors, and partitions with fire-resistance ratings less than three hours. Dynamic-rated-fire dampers are in HVAC systems that remain operational in the event of a fire.

Model ESD-435 is an extruded aluminum stationary drainable louver that protects air intake and exhaust openings in exterior walls. The drainable head and stationary horizontal drainable blades collect and further channel water to the vertical downspouts located in the louver jambs where gravity takes effect, allowing water to escape at the louver sill.