It’s probably not a good idea unless you are licensed to install fire alarm systems. A plywood demo board would be fine.
For more information on this matter:
<URL url="Legal to have a hobby system. - #14 by Signal_Alert text=“viewtopic.php?f=3&t=6481&p=58452&hilit=license#p58452”>Legal to have a hobby system. - #14 by Signal_Alert