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Smoke Exhaust & Inlet Air Fan Logic

Question asked by ranajaved0085 on Dec 5, 2018



Need your support to understand the smoke fan start and stop logic in case of fire alarm.


In one of our building's cable room we have Supply smoke inlet fan and exhaust smoke fan.


As per HVAC logic smoke inlet and exhaust fan start on fire alarm but in descriptive instruction it is mentioned that it needs to be start on manual after fire extinguished.


What is the standard practice and NFPA recommendations for the cable room supply smoke fan & exhaust smoke fan in case of fire signal.


Need your expert opinion and advice.