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Square galvanised steel fire damper, 11-3/4 inch frame

Dayton

Dayton Square Fire Damper 11-3/4 In. W

SKU CH-HCR7-9W753

Square fire damper with a 1-1/2 hour fire rating and a 165-degree fusible link for low-pressure HVAC systems

  • TypeStatic With Fire Resistance Rating Less Than 3 Hou
  • Fire-rated 1-1/2 hour protection for building safety
  • UL 555 and NFPA 80, 90A, 101 compliance assured
  • 22-gauge galvanized steel construction resists corrosion
  • 165°F fusible link activates automatically in fire
  • 643 sq ft free area maintains airflow

Square Fire Damper for HVAC Systems

The Dayton square fire damper is built for low-pressure HVAC installations that require a 1-1/2 hour fire rating. Its 22-gauge galvanized steel construction and UL 555 compliance suit commercial and residential ductwork where static mounting is specified. The 11-3/4 inch width and height match nominal 12-inch duct dimensions.

Verify Duct Size and Mounting Orientation

Confirm the duct opening measures 12 inches by 12 inches nominal so the 11-3/4 inch damper fits correctly. The unit is rated for horizontal mounting only and carries a static fire resistance rating of less than three hours. Ensure the fusible link temperature of 165 degrees Fahrenheit aligns with local code requirements.

Fusible Link and Retaining Angle Included

A 165-degree fusible link is factory-fitted so the blades close automatically during a fire event. The recommended 2TGH2 retaining angle simplifies installation by providing a code-compliant mounting method. These bundled items remove the need to source separate release hardware or framing components.

Highlights

  • Fire-rated 1-1/2 hour protection for building safety
  • UL 555 and NFPA 80, 90A, 101 compliance assured
  • 22-gauge galvanized steel construction resists corrosion
  • 165°F fusible link activates automatically in fire
  • 643 sq ft free area maintains airflow

Specifications

BrandDAYTON
TypeStatic With Fire Resistance Rating Less Than 3 Hou

Questions about this item

What comes with the Dayton 11-3/4 in. square fire damper and is anything else required for installation?

The damper ships as a single 22 ga. galvanized steel unit with a 165 °F fusible link. A 2TGH2 retaining angle is recommended but sold separately.

How do I decide between the listed duct and damper dimensions for my opening?

The damper fits a nominal 12 in. × 12 in. duct; its actual blade frame measures 11-3/4 in. wide by 11-3/4 in. high with a 3-11/16 in. depth.

What does the 1-1/2 hr. fire rating mean when the damper is installed in a real HVAC system?

It certifies the assembly will resist fire penetration for 90 minutes under UL 555 test conditions when mounted horizontally in low-pressure ductwork per NFPA 80, 90A, 101 and IBC.

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