On Friday, 23 November 2018 18:35:25 UTC, ARW wrote:
I will soon be installing a new 60 detector 8 zone bi wire fire alarm
system for the communal hallways.

I wasn't sure if it was all in one building. As it is, has the landlord considered a full building fire alarm system with C-Tec Hush Buttons in each flat?

https://www.c-tec.com/fire-alarm-anc...-protocol.html

Provides an individual HMO dwelling with its own 2-minute silence facility (to BS 5839-6/12.2b) & 15-minute isolate facility (to BS 5839-6/12.2a).

Effectively stops the tenants permanently disabling any detectors as any faults will show up on the panel (and if the panel has an autodialler the landlord can be informed immediately and take appropriate action).

Unless fire compartmentation supports a 'stay put' policy then a full building fire alarm is probably required to get everyone out.

Sounder volume at the bedhead is likely to be an issue with a communal-areas-only system too.

Owain