Notification Programming - Mixed Use Floor

Fire Alarm Help
1

Working on a commercial building, 4 floors. Each floor is roughly 8,500 sq.ft.
2nd floor was previously only business, now it’s split into business & R-4 Residential.
The R-4 Residential space has a bunch of sleeping rooms with a shared common corridor and common living rm./kitchen.
I added a bunch of smoke/co detectors in the R-4 space for the sleeping units.
There’s a question regarding alarming. Initially I had noted to program it such that: Any initiation device within a sleeping room alarms only the sleeping room and sends supervisory signal. But now the architect is saying this is actually a “dwelling unit” since there’s a shared kitchen/living rm.
Would it make more sense to program to alarm the entire R-4 space if initiation of any device in any of the sleeping rooms?
Or stick with alarming just the affected sleeping room?

Also, initiation of a common device in R-4 area (common corridor/living/kitchen)… would it make more sense to alarm just the R-4 area in that case or whole building?

Thank you

2

I would say that what would make the most sense would be the R-4 area fully alarming if any device in the area is activated. Maybe you could have a heat detector near the exit of the R-4 area that alarms the whole building. Obviously, any building alarm should alert the whole R-4 area.

I’m not referencing any code when writing this, it’s just my opinion on what would make the most sense. No matter what you do, make sure it is code compliant and safe.