Smelling the flowering grow despite having a carbon filter

Can you vent to the outside? One good fan like the one in your tent piped out the window or up the chimney will take make your basement have negative pressure or in the least, turn the air over. Better yet, vent directly outside and not into your basement.

I helped an acquaintance take it one step better. We used 3" PVC and routed the carbon filtered exhaust fan to the chimney (old house so the chimney started in the basement). The hot water heated already vented into the chimney so we expanded the hole (knocked out a brick) and ran the PVC inside the chimney. We then used cement and filled in the gaps followed by silicon.

We could'a stopped there, but the paranoia got to us (he rents out half the house as an apartment) so before we sealed it up, I got up on the roof at night, removed the chimney cover, and stretched silver slinky-like venting tubing down the chimney so it would vent directly to the world. I wasn't too pro on that part till we were done and I felt very secure about it.

Me too, congrats you have some dank weed! For me it turned out to be the filter was used up and old. Bought a new better filter and the problem was solved.

Wow a lot of opinions huh. First check what the filter is rated for and don't exceed that, replace the charcoal when you start to smell it. Keep your room in a slight negative and there should not be any odours leaking out, if sucking through the filter you have less chance of air leaking out of the piping down stream of the fan and filters are meant to be on the intake hense the outer pre filter, it also protects the fan from excess dust, same as a furnace filter. It doesn't take a huge fan to vent a 4x4 area, a whole house ventilation system is on average 120 cfm, just saying lol.

Carbon filters will lower the smell but they won’t eliminate it fully. Just make sure you have negative pressure and That’s all you can do.

adower said:

Carbon filters will lower the smell but they won’t eliminate it fully. Just make sure you have negative pressure and That’s all you can do.

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Mine works really well but doesn't last long. I have a whole house hepa that draws 165 cfm and it has a prefilter of charcoal plus the canister, it lasts about 3 months. Just built a 3' one at the shop that I'm thinking of filling with BBQ charcoal after I crush it, it didn't look big on paper lol.