 and seal up and tape up and put air filters on that and then i will run that in a room and let that filter the air and if you put good air filters on there and seal it up really tight on the intake side it will filter that air so you can make your own air filter doing that it works out really well just make sure you don't do make sure you have a big enough filter so you don't burn up that fan it needs to have enough air going through there so you don't want to burn it up and cause fire but if you build this out