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> ventilation in many buildings sucks

We've known that for a long time[0]. I have friends that are plumbers and HVAC people, that have to do strange stuff, by law.

[0] https://www.cdc.gov/legionella/index.html

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Can you expand on this enigmatic comment?

Just that Legionnaire's Disease has caused a whole lot of laws and codes to be created. Things like that weird gap under industrial sinks.

Are you sure the gap under the sink is due to Legionnaire's Disease? I think it's just not to contaminate the sink in case of backflow.

According to my industrial plumber friend (over 40 years), the distance is set by law, and it is specifically for Legionnaire's Disease. Whole bunch of other stuff, too.

He worked on skyscrapers all over NYC.

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