not to get off subject.... and i do like these filters... they seem nice... i would maybe customize the idea a bit.... maybe a couple of layers of those filters with the carbon dust in between.... thats pretty much what i did on my setup.... all of the vents have those filters cut to the duct size and stuck inside with foil tape... but i have to say that i would recommend the following much more... its a liquid caled ONA. and you can make these little buckets with a fan on the top that disperse the smell really good I have it attached in the inside acting as a second exhaust... it works great.....
you can see on the other exhaust i put coming from the flowering chamber has those carbon filters in the inside ....