DIY fume extractor... vent cover on down pipe?

[Ali]

@Ali thoss pictures and others were taken at our Lab in Buxton, you'd love it there. They have some amazing kit

I would. The qualitative side interests me more than any other aspect. People open their eyes when you show them a picture of what they’re breathing in (even better if it’s an actual picture of them going about their job, not a textbook image as above).

Numbers are boring.