Hvac Fire Damper Requirements

In the event of a fire or fire alarm an hvac blower is designed to either continue working or shut down entirely.

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. Nfpa 105 is the standard which prescribes the minimum requirements for smoke door assemblies and smoke dampers. 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.

Introduction in order to ensure that they will operate properly when needed federal certification requirements mandate that fire and smoke dampers in healthcare facilities undergo routine maintenance see nfpa 101 12 sections 18 19 5 2 1 and 9 2 1. Testing and inspection requirements for fire dampers. 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. 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.

Fire damper required smoke damper required typically ducts shall not penetrate fire walls but if allowed then damper is required no requirements stated in section yes unless penetration meets astm e119 or ul 263 or meets all of the following. Wall is 1 hr or less building is fire sprinklered entire duct system is 26 ga. The six year frequency allows for a reasonable but safe length of time between inspections and also ensures the integrity of the hospital operations. Hvac medical gas systems sprinkler piping electrical systems etc located near the fire dampers and above the ceilings.

There are two types of applications for fire dampers. Maintenance and testing of fire smoke dampers. 1000 pa at the rated airflow. 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. Metal fab s dynamically rated fire dampers are tested and approved for use up to 4 w c.