True Round Fire Damper, Horizontal/Vertical Mount, 1.5 HR UL-Rated

Sizes 4-12 – Model S3
A true round fire damper that utilizes a curtain style design (Model S3) to prevent the spread of fire through a penetration in a fire rated barrier made by an HVAC duct or transfer. These dampers approved for static or dynamic applications and are qualified for both horizontal and vertical installations.

Sizes 18 – Model FD-TR
A true round fire damper that utilizes a butterfly blade design that can be installed vertically or horizontally (1.5 Hour only) and is meant for static HVAC systems (fans turn off in a fire) only. The true round design is an ideal choice for when fire dampers are needed after the wall/floor of a building has already been installed.