Certified air purifier/vacuum?
Is there a vacuum out there it is a certified air purifier? I recently learned that vacuums blow out dust, even ones with expensive hepa filters leak some form of bacteria into the air.
I’m looking for facts only, not opinions. Sources preferred.
If you take a high power flashlight and shine it at the exhaust, you can see dust coming out. Even on the new dysons, orecks and kirbys.

Any vacuum cleaner you want like that is going to be pricy. And usually when my vacuum cleaners start blowing dust, either a filter needs to be changed, a hose is clogged, or the dust catcher- whatever form it might take- needs to be emptied.
I understand that Rainbow Vacuums, while cumbersome, are very good at controlling blowing dust because of the way they work. Try running a web search on hospital-quality vacuums: Those have to be very good at controlling dust because of where they”re used.
Good luck!
I have a Dyson, the salesperson said that I could turn it on and leave it in the corner and it would work as well as an air purifier.
Read this:
http://www.dyson.com/store/allergy.asp
I hope this helps, good luck!