the.com/baghouse

A giant vacuum bag that catches smokestack soot so your lungs don't have to.

means An industrial air-pollution control building filled with fabric filter bags that trap dust and particulates from exhaust gas before it's released into the atmosphere.

from Straightforwardly compound: 'bag' plus 'house,' naming the building by what's literally inside it — rows and rows of long fabric filter bags, hung like socks in a closet, that the dirty gas is forced through. The term emerged alongside industrial-scale dust and fume control in the 19th and 20th centuries, as factories and smelters needed a word for the structure housing this filtration array. No hidden trick to it — it's a house for bags, and the bags happen to be saving everyone's lungs.

how it works
Fabric filters trap particles like a furnace filter, scaled to a building
capture rate
Can remove over 99 percent of airborne particulates
used by
Coal plants, cement kilns, grain elevators, steel mills
maintenance risk
Dust buildup can trigger explosions if not managed
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