Air should come back out since it sucks it in and it has to go somewhere.
Why does my vacuum cleaner blow out dust.
Typically when sucking up the water you won t ever have an issue with blowing dust back into the room so we ll scratch that out as an issue right away.
I ve cleaned out my vacuum thoroughly of all clogs i can literally see straight through every hose including the tiny one that s a connector to the hose from the very bottom that s screwed in and there s no switch seen anywhere to blow it out instead nor any way to reverse the hose.
If an upright cleaner is spitting everything out it means that the brush roller is ejecting everything.
But dirt should stay either in the bag or the bagless container.
My shop vac was blowing dust out the back because there s supposed to be a filter on that plastic frame.
My vacuum takes a vf4000 filter.
For a vacuum to do more harm than good it has to be a really old vacuum cleaner that has never been cleaned she says.
In general most vacuums do take up more dust dirt and allergens.
Although the filters should deal with it a torn vacuum cleaner bag will also allow the dirt and dust to simply blow through the machine.
There are vacuums that have more hepa filtration for taking out small particles but if you are seeing dirt blow back out the vacuum is either broken or the bag is full.
While many vacuum cleaners have other features or options that enhance this basic purpose the general idea is the same to clean the floor.
The remnants of the filter are in the bin.
Yours may vary but a lot of shop type vacuums use them.
There are two ways this can happen.