I have seen industrial ventilation systems in many factories that are designed to remove “heavier-than-air” vapours from the ground. Unfortnately the factory owner has often wasted many thousands of dollars
Industrial Ventilation
I travelled by air to Rockhampton by air recently to deliver an introductory occupational hygiene course for a client. I like to demonstrate industrial ventilation and one of the things I was unable to take on the plane with me was a Drager Smoke Tube.