Hot air containing contamination particles, grime, oil, ash, sparks, and smoke flies into the entry chamber of the hydrofilter. At that point, the speed of the air flow reduces, sparks are completely suppressed, and grime, ash, and grease particles settle on the surface of the damper grid.
The cleaned air makes a turn at a reduced speed, accelerating by up to 10 units while narrowing in a wall between the chambers. As a result, all spray particles are cleaned, including some of the smoke. Then the air enters the exit chamber where it slows down and drops along with remnants of the grime, oil, and ash remain at the exit. Exiting from the hydrofilter is air cleaned of grime, oil, ash, and part of the smoke and odors cooled down to +85 to 105 °F.