will this control odor?

alright im growing 2 to 3 plants in a closet 8 ft in length, 3 ft in width, and 9 ft in heighth. my question is would a air filter work in that area? To describe it, it says it removes 99% of the harmful pollutants in the air and circulates and filters the air 5 times an hour. If so where should i place them, on the ground, or above the lights? thanks for any input.

uhm the smell of weed growing isn't a harmful pollutant. a regular air/hepa filter won't remove the odor.

you need to use carbon filter or UV lighting/Air purifier to remove the smell.

if you can't afford a decent fan then go for a makeshift ONA bucket rig or something.
imo it's not worth skimping on ventilation, better to have more than enough than having too little.

my closets the same size and an ionizer works fine for me they sell them at walmart i think there proly as cheap as $35

well, there will be much more oxygen in your room
i can tell you that...