Fire Damper Installation Instructions  ●  Fire Dampers Downloads

Fire dampers are offered in two frame profiles: Standard (4 1/4”) and Thinline (2”).
Blades are of an interlocking, curtain style. Fire dampers are offered in three types:

• Type A - Blades are “In the airstream”
• Type B - Blades are “Out of the airstream”
• Type C - Blades and frame are “Out of the airstream”

Fire dampers are UL® rated as 1 1/2 hour or 3 hour devices, and all are activated via a fusible link. Fire dampers are offered for use in both STATIC and DYNAMIC Systems.

Static Systems - Those in which the system fans shut down during fire and smoke control.  Dynamic Systems - Those in which the system fans remain running during fire and smoke control.

Fire dampers are manufactured 1/4” under the nominally ordered duct size. Fire dampers are available in galvanized and stainless steel.

Ceiling Radiation Damper Installation Instructions  ●  CRD Document Downloads

Ceiling radiation dampers, “CRD’s”, are offered in both Rectangular and Round.

All CRD’s are spring closured and are  UL®  rated 3 hour devices.

Blades are of a centrally hinged “Butterfly” style with the exception of the CRD 54, which is a single blade model made available in three popular sizes.

Two options for link attachment are:

• Standard Link - Link mounted between the blades.
• “Easy Access” Link - Link mounted between a “hook and catch” on the side of the blades.

CRD’s are manufactured 1/4” under nominally ordered duct sizes. CRD’s are available in galvanized and stainless steel.

Replacement links, Retaining Angles, Sleeves, Boots and Thermal Blanket are offered for convenience.