Nfpa 105 is the standard which prescribes the minimum requirements for smoke door assemblies and smoke dampers.
Hvac fire damper requirements.
Fire damper application types.
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.
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.
There are two types of applications for fire dampers.
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.
Hvac medical gas systems sprinkler piping electrical systems etc located near the fire dampers and above the ceilings.
Metal fab s dynamically rated fire dampers are tested and approved for use up to 4 w c.
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.
Maintenance and testing of fire 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.
Testing and inspection requirements for fire dampers.
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.
Wall is 1 hr or less building is fire sprinklered entire duct system is 26 ga.
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.
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.
A 1 1 an air duct system has the potential to convey smoke hot gases.
1000 pa at the rated airflow.
