question about air purity

I have a 10x10x8 room. It is ventilated with a 500cfm fan that is run through 2 1000 watt lights

I have a carbon filter but it is not hooked up because I am not concerned about odor control

my question pertains to things like dust and other indoor contaminants. Im assuming the air in the room is recirculated a few times a minute about so I dont see why these kind of things could stress the plants at all

over all I am wondering if i should run an air purifier. of the nice variety. carbon or hepa. I have searched the forums but too much garbage to ween through. please respond if you have experience or resources for your statement.

keep one rolled

would you be fine spending 24 hours a day breathing in the air in your grow room? If yes then you don't need it.