What is the difference between a dynamic and a static fire damper?

Dynamic Fire Damper: Rated to close securely while the HVAC system fan is actively running and pushing high-velocity air through the system. Features a heavy spring-assisted closure system. Static Fire Damper: Rated to drop shut purely via gravity once the system fan shuts down entirely. It cannot close safely against active system velocity.

[' Dynamic Fire Damper: Rated to close securely while the HVAC system fan is actively running and pushing high-velocity air through the system. Features a heavy spring-assisted closure system. Static Fire Damper: Rated to drop shut purely via gravity once the system fan shuts down entirely. It cannot close safely against active system velocity.']

Stop if

• Use this as training guidance. The foreman, approved drawings, project specs, manufacturer installation instructions, employer safety policy, and AHJ/code requirements always control the final answer.

Steps

• Stop and verify the approved detail, manufacturer instructions, foreman direction, and project specs before touching it.
• Dynamic Fire Damper: Rated to close securely while the HVAC system fan is actively running and pushing high-velocity air through the system. Features a heavy spring-assisted closure...

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