Many thanks for the responses.
I appreciate the comment but thankfully the utility room only has a solid door for access so no window to break in through and all other PIRs in the house will of course immediately trigger the alarm.
So the original question - will this setup with timer...
Hopefully a simple question..
About to install a Texecom 24 system and for ease of installation really want to avoid having to install door contacts. Instead I have planned to have a PIR by the main entrance (utility room), set as Entry/Exit 1 and use a timed exit arm mode.
I assume...