[RB56]

Originally Posted by OG Tree Grower

I think I know what the problem is now that I have a clear picture in my head of your grow room. You need negitive pressure all the time , smell will always get out of a sealed room through cracks, opening and closing doors ect. I've even had a place with a double entrance to try to "seal" the grow but it's just not possible. You have two options, create a lung room and vent your scrubbers into that or use a small 6" scrubber and fan to vent outside on an idle. or like others have said , ozone and vent outside.

This my thinking as well. A sealed room that is stinking up the house isn't sealed. Negative pressure is critical. Doesn't have to be much. If I have everything set up right, I can eliminate odor from two grow rooms with a single filter (Phresh). I don't count on everything being and remaining perfect so always run at least two for insurance, but both are in the same room. Escaping smell for me has always meant I was somehow exhausting contaminated air.

[chomsky]

Originally Posted by RB56

This my thinking as well. A sealed room that is stinking up the house isn't sealed. Negative pressure is critical. Doesn't have to be much. If I have everything set up right, I can eliminate odor from two grow rooms with a single filter (Phresh). I don't count on everything being and remaining perfect so always run at least two for insurance, but both are in the same room. Escaping smell for me has always meant I was somehow exhausting contaminated air.

OK OK you guys got me... My room probably isnt as sealed as I claimed... Its sealed enough to contain the Co2 for the most part but Im wasting it venting. I gotta figure out this negative pressure deal...

Thanks

Originally Posted by chomsky

OK OK you guys got me... My room probably isnt as sealed as I claimed... Its sealed enough to contain the Co2 for the most part but Im wasting it venting. I gotta figure out this negative pressure deal...

Thanks

I've tried over 15-20 times to truely seal a room but even with unlimited money and time I could never truely seal a room, that's when I got into lung rooms and making a perfect environment in my lung room, then you pump the air in and out of the lung room, this creates negitive pressure on the grow area, it also allows you to put all your equipment in the lung room. Makes a "perfect environment" for the plants, no hot or cold spots, no soaked plants from the fogger , not dry plants from the dehumuidifyer ect, nothing but plants and lights in the grow room makes for beautiful harvests, I'm just a bit busy to make this a lengthy reply but if u have questions about setting up your lung room shoot away and I'll come back here later today

[chomsky]

Originally Posted by OG Tree Grower

I've tried over 15-20 times to truely seal a room but even with unlimited money and time I could never truely seal a room, that's when I got into lung rooms and making a perfect environment in my lung room, then you pump the air in and out of the lung room, this creates negitive pressure on the grow area, it also allows you to put all your equipment in the lung room. Makes a "perfect environment" for the plants, no hot or cold spots, no soaked plants from the fogger , not dry plants from the dehumuidifyer ect, nothing but plants and lights in the grow room makes for beautiful harvests, I'm just a bit busy to make this a lengthy reply but if u have questions about setting up your lung room shoot away and I'll come back here later today

Whenever you have a chance that would be awesome. No hurry. My biggest problem though with venting is that I run CO2. Is there a way to not waste to that?

[RB56]

Originally Posted by chomsky

OK OK you guys got me... My room probably isnt as sealed as I claimed... Its sealed enough to contain the Co2 for the most part but Im wasting it venting. I gotta figure out this negative pressure deal...

Thanks

It's easy - blow more than you suck Let's say your room leaks air. For negaiteve pressure, you need to be pushing more air out of the space than seeps in through the gaps. That means air only moves into your space through the gaps and out through the exhaust. If you were to blow smoke toward a gap from outside the room, it should get sucked into the room. Lose negative pressure and air and stink seep out through the gaps.

You can also run into problems if you have a filter -> duct -> light -> exhaust arrangement with a fan at the exhaust point. This will create negative pressure in the ducts and lights that sucks stink into the system after filtration that is then exhausted. Lots of ways to end up exhausting stink air instead of filtered air.

the lung room is normally adjacent to the grow and they just exchange air 24/7 , there is no venting to the outside. You will use slightly more co2 because both rooms will have the same co2 ppm of course but it is still a sealed setup because nothing leaves those two rooms. Usually I just vent the scrubber through the wall and it blows scrubbed air into the lung room, and it passively gets sucked back into the grow after its treated by all your other air condition/ environmental gear. Your lung room will be free of smell so I always use that as my entrance and no smell escapes when your opening and closing doors or working on stuff. Your grow will always have negitive pressure and you will rid your self of any smell issues.

Or a cheaper way is to use the smallest fan/filter combo and a controller to set it on idle, and vent a tiny amount of air outside, this keeps negitive pressure on the grow but you will burn through co2 a bit faster since your exhausting it.

Both ways work well if you generate co2, if your using bottles ya pretty much gotta keep it sealed with the lung room

[YetiOG]

Originally Posted by chomsky

OK OK you guys got me... My room probably isnt as sealed as I claimed... Its sealed enough to contain the Co2 for the most part but Im wasting it venting. I gotta figure out this negative pressure deal...

Thanks

Building a totally sealed room is very tough and using a AC well that's not sealing it at all unless it's ductless...

I was going to say you need to be sure the room has negative pressure so it dosent possibly leak smell. Pretty easy extract more than you intake. Tada! Start there and also look at a ductless ac

[chomsky]

Originally Posted by YetiOG

Building a totally sealed room is very tough and using a AC well that's not sealing it at all unless it's ductless...

I was going to say you need to be sure the room has negative pressure so it dosent possibly leak smell. Pretty easy extract more than you intake. Tada! Start there and also look at a ductless ac

I do understand all that. My biggest concern though is venting out all of the CO2 I'm using. If I'm venting more than I'm taking in it seems to me like I would be pushing out CO2 and I would have to buy so many tanks it would be ridiculous.

That's right your bang on, you need a ductless ac OR rid your self of the co2 and exhaust your room sizex2 this will keep plenty of fresh air and co2 available to the plants

Check out this post I made a while back about fresh air exchanged rooms.
https://www.icmag.com/ic/showthread....112862&page=83

[EastCoast710]

Originally Posted by chomsky

I do understand all that. My biggest concern though is venting out all of the CO2 I'm using. If I'm venting more than I'm taking in it seems to me like I would be pushing out CO2 and I would have to buy so many tanks it would be ridiculous.

either fully seal it.. and don't have exhaust.. just exhaust your lights. if your using co2.. grab a dehumidifier and AC.. and just seal the bitch. a lot of dudes in Colorado running sealed rooms aren't exhausting shit but there lights.