What should be done when the duct size is larger than available fire and smoke dampers?

When the duct size exceeds the available fire and smoke dampers, one effective solution is to join individual dampers to create a multi-damper assembly. This method allows for the adaptation of the fire and smoke protection system to fit larger duct sizes without compromising safety or code compliance. By combining multiple dampers, the overall area can meet the required specifications, ensuring that fire and smoke can be effectively managed within the HVAC system.

This approach is particularly useful as it helps maintain proper airflow while adhering to safety standards, avoiding the need to close off the ductwork entirely, which can impede system performance. Using larger dampers may not always be feasible or cost-effective, and taking no action would violate safety protocols, putting the system at risk. Therefore, the assembly of multiple dampers presents a practical and compliant solution to the issue at hand.