@lillepallt(View Post) not quite. what @randalserrano propsed was if there was a big enough pressure difference, it would generate SPRK, which would be more flexable than if it were just a set pressure boundry.
Thing is, there are certain cases where dust would ruin certain simulations. If you wanted to make a simulation where there has to be a perfect amount of air pressure to make a certain thing happen, you would need a pressure detector to make the pressure adjust.