
Ruskin FDR25-08 Damper
The Ruskin FDR25-08 is a high-performance 8-inch round fire damper engineered for seamless integration into fire-rated partitions and HVAC ductwork. This true round fire damper features a 1-1/2 hour fire rating and integrates a 165°F fusible link, ensuring positive closure and code-compliant fire containment when ambient temperatures exceed safety thresholds. Built by a leader in airflow control, the FDR25-08 utilizes a heavy-duty galvanized steel frame and a single-blade design to minimize pressure drop while maintaining structural integrity during extreme thermal events. Designed for contractors who prioritize UL 555 classified equipment, this damper simplifies installation in circular duct configurations. Whether for commercial multi-family housing or industrial ventilation systems, the FDR25-08 provides the necessary static fire protection required by local building codes and NFPA standards.
Key Benefits for Technicians:- UL 555 Rated: Classified for use in dynamic or static systems requiring a 1.5-hour fire barrier.
- Optimized Airflow: The low-profile 8" round damper design minimizes air resistance and system turbulence.
- High-Temperature Reliability: Equipped with a standard 165 degree fusible link for rapid, heat-activated response.
- Durable Construction: Features a corrosion-resistant galvanized steel roll-formed frame for long-term field reliability.
- Hassle-Free Installation: Precision-sized for standard 8-inch spiral or rigid ductwork.
Can the FDR25-08 be mounted horizontally or vertically?
The Ruskin FDR25-08 is typically designed for vertical installation in walls to maintain the integrity of fire-rated barriers, though specific orientations should be verified against your project’s UL assembly requirements.
What is the maximum pressure rating for this damper?
As a standard HVAC fire damper, it is engineered to remain closed against a maximum pressure of 2,000 to 4,000 fpm depending on the specific system configuration and UL listing details.
Does this unit include a sleeve for installation?
This model is the damper assembly; always ensure your installation includes the necessary sleeve and retaining angles required by the UL 555 installation instructions to ensure code compliance.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Original: $297.36
-65%$297.36
$104.08Ruskin FDR25-08 Damper
The Ruskin FDR25-08 is a high-performance 8-inch round fire damper engineered for seamless integration into fire-rated partitions and HVAC ductwork. This true round fire damper features a 1-1/2 hour fire rating and integrates a 165°F fusible link, ensuring positive closure and code-compliant fire containment when ambient temperatures exceed safety thresholds. Built by a leader in airflow control, the FDR25-08 utilizes a heavy-duty galvanized steel frame and a single-blade design to minimize pressure drop while maintaining structural integrity during extreme thermal events. Designed for contractors who prioritize UL 555 classified equipment, this damper simplifies installation in circular duct configurations. Whether for commercial multi-family housing or industrial ventilation systems, the FDR25-08 provides the necessary static fire protection required by local building codes and NFPA standards.
Key Benefits for Technicians:- UL 555 Rated: Classified for use in dynamic or static systems requiring a 1.5-hour fire barrier.
- Optimized Airflow: The low-profile 8" round damper design minimizes air resistance and system turbulence.
- High-Temperature Reliability: Equipped with a standard 165 degree fusible link for rapid, heat-activated response.
- Durable Construction: Features a corrosion-resistant galvanized steel roll-formed frame for long-term field reliability.
- Hassle-Free Installation: Precision-sized for standard 8-inch spiral or rigid ductwork.
Can the FDR25-08 be mounted horizontally or vertically?
The Ruskin FDR25-08 is typically designed for vertical installation in walls to maintain the integrity of fire-rated barriers, though specific orientations should be verified against your project’s UL assembly requirements.
What is the maximum pressure rating for this damper?
As a standard HVAC fire damper, it is engineered to remain closed against a maximum pressure of 2,000 to 4,000 fpm depending on the specific system configuration and UL listing details.
Does this unit include a sleeve for installation?
This model is the damper assembly; always ensure your installation includes the necessary sleeve and retaining angles required by the UL 555 installation instructions to ensure code compliance.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
The Ruskin FDR25-08 is a high-performance 8-inch round fire damper engineered for seamless integration into fire-rated partitions and HVAC ductwork. This true round fire damper features a 1-1/2 hour fire rating and integrates a 165°F fusible link, ensuring positive closure and code-compliant fire containment when ambient temperatures exceed safety thresholds. Built by a leader in airflow control, the FDR25-08 utilizes a heavy-duty galvanized steel frame and a single-blade design to minimize pressure drop while maintaining structural integrity during extreme thermal events. Designed for contractors who prioritize UL 555 classified equipment, this damper simplifies installation in circular duct configurations. Whether for commercial multi-family housing or industrial ventilation systems, the FDR25-08 provides the necessary static fire protection required by local building codes and NFPA standards.
Key Benefits for Technicians:- UL 555 Rated: Classified for use in dynamic or static systems requiring a 1.5-hour fire barrier.
- Optimized Airflow: The low-profile 8" round damper design minimizes air resistance and system turbulence.
- High-Temperature Reliability: Equipped with a standard 165 degree fusible link for rapid, heat-activated response.
- Durable Construction: Features a corrosion-resistant galvanized steel roll-formed frame for long-term field reliability.
- Hassle-Free Installation: Precision-sized for standard 8-inch spiral or rigid ductwork.
Can the FDR25-08 be mounted horizontally or vertically?
The Ruskin FDR25-08 is typically designed for vertical installation in walls to maintain the integrity of fire-rated barriers, though specific orientations should be verified against your project’s UL assembly requirements.
What is the maximum pressure rating for this damper?
As a standard HVAC fire damper, it is engineered to remain closed against a maximum pressure of 2,000 to 4,000 fpm depending on the specific system configuration and UL listing details.
Does this unit include a sleeve for installation?
This model is the damper assembly; always ensure your installation includes the necessary sleeve and retaining angles required by the UL 555 installation instructions to ensure code compliance.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.









