Smell Control

Not all carbon filters are the same. One brand may use more active carbon than the next. Unless you can get that info from their customer service, it's not likely listed even though it's probably the single most important spect to assess quality. A good carbon filter should handle most of it... if you have a strong enough fan to have one on intake and exhaust side of the duct, that would also improve performance. Not all carbon filters are reversible... you typically have to reverse the flange to do so, if it is even designed to do so. beyond that.. if you have 'some' negative pressure in the tent, you won't have any leaks. if it is incredibly important to you, you may want to find a product that allows you to easily empty and refill an amount of active carbon that ensures proper performance. Buying that stuff in bulk is probably more cost-effective than a new filter as they wear out anyway.

Doing it the way you are doing it, vent up bro. Up up up. At that point just pull the damn line straight through the wall and vent it as high up as possible. The only other thing that you should start thinking about is why does your grow smell so much? Cannabis grows smells late, late in flower. Because of volatiles being lost. Only a small amount of this is natural/required/normal/unable to be changed or prevented... Like resin strings ripping a trichome as she stacks or a photon damaging the cuticle. Things like your environment, how you handle the flower, etc are things that you control that protect your volatiles. That is a long winded way of saying that you could be cultivating in a manner such that you minimize smells in the first place.

A second carbon filter can certainly help, but I would first look at your primary ventilation setup. A few things worth checking: Make sure your tent maintains slight negative pressure. The walls should pull inward slightly when the exhaust fan is running. Check all duct connections, zippers and cable openings for leaks. Even small gaps can allow unfiltered air to escape. Make sure your carbon filter and inline fan are properly matched. Moving air too quickly through a filter can reduce its effectiveness. Check the humidity levels. High humidity can affect activated carbon performance. Check the condition of your main filter. Carbon filters don't last forever. One thing I would particularly look at is your exhaust destination. You're currently exhausting into an adjacent room, where you're trying to capture the remaining smell with a second filter. That can work as additional filtration, but it doesn't replace proper filtration at the source. I'd concentrate on getting the primary system working as efficiently as possible before adding more equipment. Good luck! Hope this helps.

why is the inlet pipe going to the extractor?

Bom dia, Voce esta bem equipado, o seu equipamento é capaz de controlar bem o cheiro,... se o cheio esta a escapar, deve necessitar trocar o seu filtro de carvão...