I’ve replaced the compressed air guns for the router table (which I’d removed a while back because it was broken) and at the metal shop and wood shop garage doors. They are labeled with their location and should stay (or at least immediately return) there.
Please remember that blowing wood dust around in the wood shop is strongly discouraged. An air gun is the only way to clean parts of the router table, but it is really the only exception.
I think you guys misunderstood; I replaced the air gun there with a better one.
The gun I had placed there before had disappeared, and somebody replaced it with an oddball gun which was reported not to be working well.
My warning was about blowing wood dust around inside the wood shop. Blowing things off at or outside the big door is fine. That’s why the gun is there.
I knew it had been broken; I didn’t know it had gotten replaced, which is why I replaced it. The new one is adjustable and should blow hard enough (with the short nozzle; its long nozzle has very anemic airflow for some reason). I never used the other one, but I do still have it.