Dayton
Dayton Rectangular Fire Damper 7-3/4x11-3/4 In
Rectangular fire damper for vertical or horizontal duct mounting, 1-1/2 hr fire rating, 165 °F fusible link, 22 ga galvanised steel, UL 555 and NFPA 80, 90A, 101 compliant
- TypeDynamic With Fire Resistance Rating Less Than 3 Ho
- Dynamic fire resistance rated under 3 hours per UL 555
- 1-1/2 hour fire rating meets NFPA 80, 90A, 101 and IBC
- Fusible link activates at 165 degrees F for automatic closure
- 22 gauge galvanized steel construction provides duct durability
- Mounts vertically or horizontally in low pressure HVAC systems
Rectangular Fire Damper for Low Pressure HVAC
This Dayton fire damper fits rectangular ductwork measuring 7-3/4 by 11-3/4 inches. It carries a 1-1/2 hour fire rating and meets UL 555, NFPA 80, 90A and 101, IBC, CSFM and NYC MEA standards. The galvanised steel body installs vertically or horizontally in dynamic airflow conditions. It is not for systems that require a three-hour or higher fire resistance rating.
Dynamic Mounting With Fusible Link Release
The damper mounts in vertical or horizontal orientations and operates dynamically within low pressure HVAC systems. A 165 degree Fahrenheit fusible link triggers automatic closure during a fire event. The 22 gauge galvanised steel construction provides the required structural integrity. The unit delivers 0.401 square feet of free area for airflow calculations. Installers must supply the recommended retaining angle separately.
Replaces Older Dampers Below Three Hour Rating
This model upgrades installations where the existing damper carries a fire resistance rating of less than three hours. The 1-1/2 hour rating satisfies many commercial code requirements without over-specifying. The jump is worth it when plan review demands current UL 555 and NFPA compliance. It does not suit applications that mandate a higher hourly rating or round duct connections.
Highlights
- Dynamic fire resistance rated under 3 hours per UL 555
- 1-1/2 hour fire rating meets NFPA 80, 90A, 101 and IBC
- Fusible link activates at 165 degrees F for automatic closure
- 22 gauge galvanized steel construction provides duct durability
- Mounts vertically or horizontally in low pressure HVAC systems
Specifications
| Brand | DAYTON |
|---|---|
| Type | Dynamic With Fire Resistance Rating Less Than 3 Ho |
Questions about this item
How long does the 1-1/2 hour fire rating hold under continuous exposure?
The damper is fire-rated for 1-1/2 hours per UL 555, NFPA 80, 90A, 101, IBC, CSFM and NYC MEA standards.
What temperature does the fusible link release at during all-day operation?
The fusible link activates at 165 degrees F, closing the blades automatically when duct temperature reaches that point.
Which retaining angle is required for this 7-3/4 by 11-3/4 inch damper?
The manufacturer recommends retaining angle 2TGG9 for installation.
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