Hvac Fire Damper Requirements

Maintenance and testing of fire smoke dampers.

Hvac fire damper requirements. A dynamic fire damper is approved for use when an hvac system will keep running in the event of a fire alarm. In the event of a fire or fire alarm an hvac blower is designed to either continue working or shut down entirely. Metal fab s dynamically rated fire dampers are tested and approved for use up to 4 w c. The ontario building code fire dampers waived 3 1 8 8.

Besides the damper test required by nfpa 105 nfpa 72 requires an annual test of the spot type smoke detector or duct detector that activates the smoke damper. A 1 1 an air duct system has the potential to convey smoke hot gases. As of april 1 1992 all fire dampers used in hvac systems that might not cycle the blower off during a building fire must be listed and labeled for dynamic closure by underwriter laboratories. Nfpa 105 is the standard which prescribes the minimum requirements for smoke door assemblies and smoke dampers.

The six year frequency allows for a reasonable but safe length of time between inspections and also ensures the integrity of the hospital operations. Fire dampers waived 1 fire dampersneed not be provided in noncombustible branch ducts that have a melting point above 760 c and that penetrate a required fire separation provided the ducts a serve only air conditioningunits or combined air conditioning and heating units discharging air not more than 1 200 mm above the floor and. Hvac medical gas systems sprinkler piping electrical systems etc located near the fire dampers and above the ceilings. Wall is 1 hr or less building is fire sprinklered entire duct system is 26 ga.

Testing and inspection requirements for fire dampers. Fire damper application types. As with testing dynamic fire dampers testing a smoke damper should be done under normal airflow conditions to confirm no impediment to operation exists due to rust or damaged blades. Nfpa 80 is the national fire protection association standard that regulates the installation and maintenance of assemblies and devices used to protect openings in walls floors and ceilings against the spread of fire and smoke within into or out of buildings.

This standard shall cover construction installation operation and maintenance of systems for air conditioning and ventilating including filters ducts and related equipment to protect life and property from fire smoke and gases resulting from fire or from conditions having manifestations similar to fire. There are two types of applications for fire dampers.