Extractor, what I’d call a bathroom fan, fair that effectively stops airflow, I’ll go with “close enough to negative pressure for civvies that they fool themselves” (I.e. ain’t actual negative pressure like a cdc lab)

A door stops airflow? No.

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fluoridation 10 hours ago | parent [-]

>A door stops airflow? No.

I mean, it literally does. Put something that smokes in a bathroom, open the window, close the door, and caulk the gaps. See how much smoke phases through the door.

	▲	refulgentis 9 hours ago \| parent [-]
		I forgot HN isn’t exactly the demographic that tries this and finds out exactly how well it works. I guess for this demographic, I’d suggest telling your tenants it’s okay to smoke in the bathroom as long as the door is closed and the fan is on.