I am not going to tell anyone they should not be careful with pressure vessels.

Everyone understands that gases are compressed under pressure. No one is trying to say that explosive decompression is not dangerous. However, I have a 500% safety factor at 20psi. These units are in widespread commercial service. I doubt Hench would still be selling Fogbuster units if the coolant canisters all exploded. I also feel that using the water filter canister is much safer than the homemade jobs I have seen while researching for this project.

This may be a good time to say that this unit is potentially dangerous and operates under pressure. All users should understand the risks of this type of device before undertaking its construction or operation.

I will leave it at that.