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Smoke detection for large conference room with Nanawalls

C

CAD Guy

New User
Location
Santa Clara
Occupation
CAD Designer
Working on a project which is a non-high rise 4-story class B occupancy. Building has a fire alarm system with voice evacuation but no smoke control system. Main alarm triggers are electrical room/elevator-related smoke detection, waterflow switch, manual pull station, and duct smoke detection on roof top units and plenum return air smoke detection. On the first floor is a large conference/assembly room which can be split into two separate conference rooms by an accordion wall. Each separated area has a large Nanawall which can be slid open to provide access to the outdoor seating area. When these Nanawalls are opened, I believe the VAV boxes providing reheat and cooling will be closed but the return air plenum transfer ducts remain open. The question arose as to how the fire alarm system can detect smoke if the VAV boxes are closed with the Nanawalls open during breezy outdoor conditions. If any smoke were to occur in the room, won't the breezy conditions draw the smoke outdoors or dilute the smoke? The building is fully sprinklered.
 
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