Hi Steve, Question is, are you competant to do so, after a basic training session offa the brigade? Will you remember everything, cover everything and explain things adequately. I wouldn't want anyone getting stuck to a CO2. Ask yourself, how are you going to demonstrate them? If the brigade set fires to put out, I would suggest you shouldn't - which takes the realism away. Which extinguishers are you going to use - because once discharged they need replacement,etc. Also, do all staff need training? I personally wouldn't.