how are you engineers
- in stair pressurization is fan need to be fire rated or No.
The fan does not need to be fire rated but the enclosure where it is located must have 2 hour fire resistance.
but if explain to me what do u mean by enclosure .
do u mean:
1- the wall surrounded stair.
2- or it is related to fan its self ( i meant Assembly of fan).
The enclosure I'm referring to is the room where the fan is located. See chapter 7 of NFPA 101.
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