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Rectangular galvanized steel fire damper, 11-3/4 by 13-3/4 inches

Dayton

Dayton Rectangular Fire Damper 11-3/4x13-3/4 In hardware

SKU CH-HJVS-9D45K

Rectangular fire damper rated 1-1/2 hours with a 165-degree fusible link for low-pressure HVAC systems

  • TypeDynamic With Fire Resistance Rating Less Than 3 Ho
  • Fits 14 by 12 inch duct openings
  • 1-1/2 hour fire rating meets UL 555 and NFPA standards
  • 165 degree fusible link activates automatically in fire
  • 22 gauge galvanized steel construction resists corrosion
  • Suitable for vertical or horizontal dynamic installations

Fire damper for low-pressure HVAC

This rectangular fire damper fits 14-inch by 12-inch nominal ducts and is rated for one and a half hours of fire protection. It is designed for vertical or horizontal mounting in dynamic airflow systems. The unit meets UL 555, NFPA 80, 90A and 101, IBC, CSFM and NYC MEA standards for life safety compliance.

Fusible link and galvanised steel construction

A 165-degree Fahrenheit fusible link triggers automatic closure during a fire event. The 22-gauge galvanised steel frame and blades resist corrosion in normal HVAC environments. Free area measures 0.772 square feet, allowing airflow with minimal restriction when the damper is open.

Retaining angle sold separately

Installation requires the recommended 2TGH3 retaining angle, which is not included with the damper. No actuators, controls or additional hardware are bundled. The product is restricted from sale in certain states, so verify local code adoption before specifying.

Highlights

  • Fits 14 by 12 inch duct openings
  • 1-1/2 hour fire rating meets UL 555 and NFPA standards
  • 165 degree fusible link activates automatically in fire
  • 22 gauge galvanized steel construction resists corrosion
  • Suitable for vertical or horizontal dynamic installations

Specifications

BrandDAYTON
TypeDynamic With Fire Resistance Rating Less Than 3 Ho

Questions about this item

How do I install the Dayton 11-3/4x13-3/4 in rectangular fire damper, and what is the common mounting mistake?

Install vertically or horizontally in a 14x12 in nominal duct using the recommended 2TGH3 retaining angle; the step often missed is securing the angle on all sides to maintain the 1-1/2 hr fire rating.

What maintenance will this 22 ga galvanized steel damper require over time?

Inspect per NFPA 80 annually: verify the 165 °F fusible link is intact, check blade movement, and ensure the galvanized frame shows no corrosion that would affect the 0.772 sq ft free area.

What is the first operational limit reached under sustained high-temperature exposure?

The 165 °F fusible link triggers closure first, limiting continued airflow; the assembly is rated for 1-1/2 hr fire resistance per UL 555 once the link operates.

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