Man the only way you are going to deal with odor from 15 plants is the carbon filter unit. You can build one or you can buy one.
I got mine online, $395.00.....
But you cant smell a thing anymore.
Don't it smell good though???
Any posts made by me are purely fictional in nature and by no means is anything I say to be taken seriously. I do not grow or condone the growing of anything not legal. Any and all pictures I post are pictures widley available on the internet and any discussions I am involved in are purely hypothetical or are commentary in nature and should not constitute advice or be considered advice to assist in activities that are deemed illegal.