Why does my house still smell Like Marijuana!!

OK.
Yes i'm in flower.
I have a sealed room with a can fan 100 Carbom filter, pulling 420 cfm out of the room and is exhausted strait out of the house. I have a 4"x 4" passive intake into the grow room, negative pressure. Unless there are leaks in the aluminum exhaust ducting ( but that's scrubbed air ) I don't see why my house still smells. does anyone have advice on this, or is this something that just happens?

I have the same problem. When my humidity jumps past 50/60% i start to smell plants. At 80% its like the filter doesn't work anymore and i can smell that shit a few streets down as im coming home from work, when i pull into my driveway it was pretty obvious even though im venting out the rear of the house. Ive never had that serious of a problem when venting into the house and i believe my humidity was also lower pulling in the air from outside. I couldn't smell it on my street either when venting into my house.

are you visiting the room often?
even with a fan if your opening the door a lot or if the room isn't sealed properly it will always smell.
when you say its a ''sealed room'' what did you do to seal the door jamb and other crevices?.

Just growing the right stuff

I just picked up a dehumidifier 2 days ago thinking it was the the humidity too. I have set down to 40% now. My door is sealed double time, 2 rubber seals at the bottom, and weather striping around the inside frame. I have to kinda force jam the door shut lol. And when i built the room, everything was sealed with drywall mud. Guess i'm just growing the right stuff like Don Geno said hahaha.

dopeleader said:

are you visiting the room often?
even with a fan if your opening the door a lot or if the room isn't sealed properly it will always smell.
when you say its a ''sealed room'' what did you do to seal the door jamb and other crevices?.

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I check on everything at least once every 24 hours or once in the morning and late at night after lights come on. its in the middle of the day when ive been gone and come home i notice the smell, as well as company.

perhaps some of the smells are escaping when entering leaving the room and when feeding etc and are being hindered by your ducted heated cooling inside house?
I cant see the room but have you gone to measures to ensure smells/draughts cant escape through the door?
or is it just moist towel at the door sort of a job?

Could be a couple of reasons.

Filter is old and needs to be replaced, fan and filter are too small for the room, fan is installed backwards on the filter, fan isn't running often enough during lights out (which also causes your humidity to spike)

My fan is running damn near 24/7 once I hit mid flower. If yours isnt, this is why your house smells.

Joe Buddens said:

I check on everything at least once every 24 hours or once in the morning and late at night after lights come on. its in the middle of the day when ive been gone and come home i notice the smell, as well as company.

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I can pretty much guarantee its because your exhaust fan isn't kicking on to exchange the air in your room during the middle of the day when your lights are off. How is your exhaust fan controlled, timer, thermostat, manual switch?

Run another carbon filter inline to scrub the air twice.

You can't have a sealed room with a passive intake. Also is the inside or outside of the house smelling?

SPLFreak808 said:

i can smell that shit a few streets down as im coming home from work,

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I want those kind of problems lol.

Don Geno said:

Just growing the right stuff

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Or maybe its the neighbour with a proper strain on the go...? Food for thought that man, FFFT!!!

Do u smoke weed in the house ? The smoke/smell sticks to the walls lol

Use a smaller Filter or a larger Fan. Chances are you don't have the "speed or shear" to scrub.
http://canfilters.com/canfilters_100.html

adower said:

Run another carbon filter inline to scrub the air twice.

You can't have a sealed room with a passive intake. Also is the inside or outside of the house smelling?

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You're suggesting a powered intake, but balanced so there's still negative pressure? I'm learning

Carbon works less well in high humidity, obviously but wondering if water vapor traveling thru the wall and building materials is carrying odor. Paint, drywall, plywood, OSB all allow vapor to pass to some degree. You can glue drywall to plywood and the glue will dry via wicking action, so water vapor is moving. Not sure if odor can be carried

drywall mud? seal that room with panda film. walls, ceiling everything.

every year or so i can smell it by mailbox. time to change carbon filter.

Rrog said:

You're suggesting a powered intake, but balanced so there's still negative pressure? I'm learning

Carbon works less well in high humidity, obviously but wondering if water vapor traveling thru the wall and building materials is carrying odor. Paint, drywall, plywood, OSB all allow vapor to pass to some degree. You can glue drywall to plywood and the glue will dry via wicking action, so water vapor is moving. Not sure if odor can be carried

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Right now he probably has filter>fan>duct exhausting out. I'm suggesting he add another carbon filter like this filter>fan>duct>filter number 2. This way he is scrubbing the air twice.

I'm. It sure what you mean by your first paragraph.

Grandpapy said:

Use a smaller Filter or a larger Fan. Chances are you don't have the "speed or shear" to scrub.
http://canfilters.com/canfilters_100.html

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Grandpapy!

adower said:

Right now he probably has filter>fan>duct exhausting out. I'm suggesting he add another carbon filter like this filter>fan>duct>filter number 2. This way he is scrubbing the air twice.

I'm. It sure what you mean by your first paragraph.

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Thank you for the explanation man. So you'd still recommend powering the exhaust only?

What the fucks this drywall mud n shit, just buy a tent man?