As an aside to the halon thing going on here, I work in telecoms where halon was widely used as a fire extinguisher in computer rooms. Now banned, 'cos you can't breath in halon
We used to have a CO2 system in our approach control room. (Military, basement, EMP secure with 4M thick walls), but the health and safety people concluded that the chance of us getting out if it fired (alive) was about NIL.
Brilliant idea to install in the first place.....
I confess to being a PPL student with a sage green suit on order. Now....if I can find the badges I wore on the M98 uniform from the RNoAF when I was deployed last winter, I will complete the poser look!