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Square galvanized steel fire damper with fusible link

Dayton

Dayton Square Fire Damper 15-3/4 In. W

SKU CH-CX30-EYGF7

Square fire damper rated for 1-1/2 hour fire resistance with 165-degree fusible link for low-pressure HVAC systems

  • TypeStatic With Fire Resistance Rating Less Than 3 Hou
  • 1-1/2 hour fire rating protects ductwork
  • UL 555 and NFPA 80/90A/101 compliance
  • 165 °F fusible link activates automatically
  • 22-gauge galvanised steel resists corrosion
  • 257 sq ft free area maintains airflow

Square Fire Damper 15-3/4 In.

This square fire damper fits 16-inch nominal ducts and installs in horizontal orientations for low-pressure HVAC systems. The galvanised steel construction meets UL 555 and NFPA 80, 90A, 101 standards with a 1-1/2 hour fire rating. It is intended for commercial and residential builders who need code-compliant fire protection in ductwork. It is not for installers who require dynamic rated dampers or units certified for more than three hours of fire resistance.

Static Operation and Thermal Release

The damper operates in a static configuration and relies on a 165-degree F fusible link to close during a fire event. Galvanised steel blades contain the spread of flame and smoke without powered actuators. Free area measures 1.257 square feet, allowing airflow while the link remains intact. No electrical connection or external power draw is involved in normal use.

Retaining Angle and Mounting Hardware

A 2TGH7 retaining angle is recommended to secure the 22-gauge frame within the duct opening. The damper depth of 3-11/16 inches determines the required sleeve length for proper installation. No additional accessories, actuators or control modules are bundled with the unit.

Highlights

  • 1-1/2 hour fire rating protects ductwork
  • UL 555 and NFPA 80/90A/101 compliance
  • 165 °F fusible link activates automatically
  • 22-gauge galvanised steel resists corrosion
  • 257 sq ft free area maintains airflow

Specifications

BrandDAYTON
TypeStatic With Fire Resistance Rating Less Than 3 Hou

Questions about this item

How is the 15-3/4 in. square fire damper installed in a 16 in. duct, and what step is often missed?

Mount the damper horizontally in the duct opening using the recommended 2TGH7 retaining angles on all four sides; the step often missed is securing the angles to the structure per NFPA 80 so the assembly maintains its 1-1/2 hour fire rating.

What maintenance will the 165 °F fusible link require over time?

Inspect the fusible link annually per NFPA 80; replace it if it shows corrosion, paint overspray, or has been exposed to temperatures near 165 °F, because a damaged link will not release the blades during a fire.

What is the first limitation reached during sustained airflow in a low-pressure HVAC system?

The damper is rated for low-pressure systems only; sustained pressure above the low-pressure classification will cause blade deflection and prevent full closure, compromising the 1-1/2 hour fire rating.

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