Series 75 Type A Fire Damper FAQs
What does a 1-1/2 hour fire rating mean for a fire damper?
A 1-1/2 hour rating specifies that the fire damper has been tested and certified to withstand flame exposure and maintain its structural integrity for up to 90 minutes within a rated fire barrier, meeting standard commercial building codes.
What is the difference between a static and a dynamic fire damper?
Static fire dampers are designed solely for HVAC systems where the blower fans automatically shut down immediately when a fire alarm is triggered. Dynamic fire dampers are built to close against velocity and pressure, allowing them to shut properly while the system fans remain operational.
Can this Series 75 Type A damper be installed in dynamic HVAC systems?
No, this is a static-rated fire damper. It must only be installed in barrier openings where the system airflow completely stops during an emergency event. For systems where fans stay on, a dynamic fire damper is required.
What does a Type A style fire damper mean for airflow?
Type A fire dampers feature blades that rest directly inside the airstream frame when open. This traditional design causes a slight reduction in total free area, making it ideal for standard low-pressure duct configurations.
Are these dampers compliant with national building and fire codes?
Yes, Series 75 fire dampers are manufactured and certified to meet stringent safety standards, providing the necessary compliance for local municipal inspections and NFPA fire code regulations.
