Totally in agreement. Fire safety here is making sure the necessary components of a fire (fuel, oxygen, spark) never exist in the same space at the same time. Keeping unclassified electronics out of the booth, compatible PPE, proper tools/hardware, etc. Cutting costs generally never helps with safety.
However, catastrophic failure can and will occur even on well maintained system, albeit at a reduced rate. I worry about any metal moving parts (hello active recovery pumps) in the booth.
No matter how well engineered your system, however, should a leak occur and an ignition source exists between the leak and your gas sensor all bets are off.
Iām happy to be working with CO2, all I have to worry about is high pressure, asphyxiation, and maybe frost bite from contact with the Cryo phase.
