By that I mean literally sucking up stuff. The vent fan above my stove only seems to actually pull anything in while it’s on low; setting it to high makes it louder but stops pulling any smoke or steam up through the hood. I’m just curious how the hell that works; shouldn’t a faster spinning fan suck MORE? Is there some property of aerodynamics that was forgotten when they installed this shit?
Maybe the output side is clogged up and the attempt to push more air through than it can handle causes turbulence that results in slower air flow, or affects what air it is sucking up so that it pulls more from the sides rather than below.