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Clarity required on Deduction of the volume from net volume in Clean Agent system

Question asked by on Jun 14, 2020

Hi friends,

In my current project, our consultant is asking as to deduct the volume of HVAC duct from net room volume for the rooms protected with  Clean agent system. 

However, the volume of solid structure from the net volume of the room can be deducted as per NFPA2001, Cl.#5.5.1. 

Hence, please advise me in this regard with any supporting clauses from NFPA2001. 


Thanks in advance.