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?
I’m guessing you probably don’t have the air intake part of the equation. A lot of newer, more powerful hoods require an air exchanger that blows in outside air to equalize the pressure from the hood blowing air out.
The faster the hood blows, the more it struggles to pull air as the pressure in the room drops. An exchanger fixes that.
At worst though, it should be pulling in as little air as when on low, not less.
I think it initially does, but then the difference in pressure basically works against it, as the pressure inside drops