The Ultimate Odour Control Thread

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alexjones

Active Member
For my first couple of years I grew many (20+) plants in my basement and the whole house smelled like weed. Sometimes the worse was in late flowering & harvest, but sometimes in veg they created a lot of odor and when working on the plants too. Tried using candles, Ozium, and ONA with limited success. Candles are nice, walking around the house and spraying Ozium worked on occasions, having ONA in jars throughout the house was ok, but it was a pain in the ass, expensive, and the results were just ok.

When I created negative pressure in my grow rooms and exhausted the air outside the house almost all the odor issues were resolved, and could wear clothes that didn't smell like weed. The problem with not scrubbing the air was anyone coming to the house could smell it from the driveway much easier. Negative pressure with pulling air out thru carbon filter (Phresh) resolved 99% of odor issues.

ONA is used to address the 1% issue, only as a temporary situation when needed.

The problem is I have to exhaust air out all the time or odor becomes a problem :sad: So my exhaust fan run 24 hours a day while I'm growing.
 
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moname

Member
Been growing in my house's dirt floor crawl space for over 12 years in a plywood box 400 watt HID and a Dayton 175 cfm blower ducted to my sewer connection clean out running 24/7. Once in a blue moon you can get a sniff outside if it's calm, otherwise no smell at all.
 
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tobylazlo

New Member
Lemon grass is alsoo good.

I have used it for a smaller grow,with 3 auto's,and instead of eliminating the smell it covers it up.It is really interesting.

Just pour the essencial oil into a cup,add water (50-50 ratio ) and place slightly under the fan so it blows on the surface of the liquid.

You may have to add more oil every 2-3 weeks.Depsending on the strain
 
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tobylazlo

New Member
Lemon grass is alsoo good.

I have used it for a smaller grow,with 3 auto's,and instead of eliminating the smell it covers it up.It is really interesting.

Just pour the essencial oil into a cup,add water (50-50 ratio ) and place slightly under the fan so it blows on the surface of the liquid.

You may have to add more oil every 2-3 weeks.Depsending on the strain
 
Kip3000

Kip3000

New Member
I have a small 36"x20"x60" tent downstairs. I have a carbon filter inside the tent with 4" flexible duct running to a conveniently located unused exhaust duct in my chimney. I run a 4" inline fan 24/7 out of the tent and the negative pressure is perfect for control. My grow boxes, however, are a different story. I use them for propagation in a perpetual type of grow but i think i may have to stop until it gets warmer outside and I can do the smellier jobs associated with my meds in a more suitable place. I think I will have enough product from my current grow to last me until it gets warmer outdoors.
 
mikeymike83

mikeymike83

Member
I was wondering if this would affect my plants. I have a 4ft tall 5ft wide and 2ft deep grow tent. I am using the ona gel outside my grow tent but not inside. stuff seems to be working, smell is down quite a bit. I just want to know if I left this near my tent with the window flaps open for fresh air would the plant and bud be affected from the ona gel? any feedback would help thanks
 
mikeymike83

mikeymike83

Member
I was wondering if this would affect my plants. I have a 4ft tall 5ft wide and 2ft deep grow tent. I am using the ona gel outside my grow tent but not inside. stuff seems to be working, smell is down quite a bit. I just want to know if I left this near my tent with the window flaps open for fresh air would the plant and bud be affected from the ona gel? any feedback would help thanks
 
listmann

listmann

Well-Known Member
alexjones said:
The problem is I have to exhaust air out all the time or odor becomes a problem :sad: So my exhaust fan run 24 hours a day while I'm growing.
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Why is that a problem? So does mine it has to... I have neighbours :-D

I figured i had to use carbon filters first off though so i never had ur problem. I use CAN filters.

But even if i didn't use filters the exchaust would have to run constantly or the RH would get mad high during night periods :-(
 
Kip3000

Kip3000

New Member
I have read a good deal about the ona gel and the majority of threads that I've seen do recommend that the ona block not be used in close proximity to your meds.
It's really up to you of course.
 
Javadog

Javadog

Well-Known Member
I am not sure. I can tell you that NIGs clean the air.

(seem to make stuff clump together and fall out of the air)

I have not noticed them removing smells though, but this
stands to reason.

Good luck,

JD
 
purplelicious

purplelicious

Well-Known Member
I can tell all of you the best way to control odor is a sealed room. People talk about sealed rooms but they never really run a truly sealed room. I however do and have for a very long time. So here is wat you do. For small rooms they sell a portable a/c unit,it has a separate intake, and pulls air from outside the room or tent...https://www.sunlightsupply.com/shop/bycategory/ac-dehumidification-humidification/ideal-air-dual-hose-air-conditioner-12,000-btu ....they tend to sell the best ones on hydro websites. I wonder why? And as far as going bigger, stick to a/c just go for one that fits your room. Use a highest btu dual port or a mini split for a medium to large room, like 4 to 8 lights. Use a full size unit, like a 2 or 3 ton for a large to very large room 8k watt and up, and mount the air handler so the return vent is pulling in air from inside the grow room. If you have sealed hoods that pull in fresh air, you could possibly be leaking odors from your room through your lights, they are not air tight I assure you. I suggest hoods with no vents like adjustawing or agrotech magnum. If you do run a vented light, you have to filter the air coming in and leaving the room, and still like I said the hoods really are not sealed 100% and the filters are not 100% So save the money you would spend on expensive hoods with glass,ducting,vortex inline fans,odor gels, and whatever else you would try and still probably have smell issues and heat issues. Use a dehumidifier, although the a/c will dry out the air, it is best to keep it as consistent as possible. Finally throw in a air scrubber suitable to the size of your room,just set a single vortex fan right on top of a carbon filter scrubber and set it in the corner of your room or hang it up. This will create a vacuum pressure environment where only air gets sucked in, no air gets pushed out. I have not used ION filters but if I did I would use the ones with the uvc light that kills bacteria. I have been wanting to try one but my rooms never leak odors, so it would just be for the anti bacterial effect, they even use them to purify water. They also have those lights you can install inside your a/c vent. If you can't control your odors this way then you have some super stanky shit, and I want a cut!
 
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avnewb

Well-Known Member
purplelicious said:
This will create a vacuum pressure eironment where only air gets sucked in, no air gets pushed out.
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So ur sucking from inside grow room and blowing exhaust outside grow room with ozone generator? Tried to do a sealed room but think im just going to carbon filter maybe ozone generator in exhaust to adjacent unfinished room. Dont think I will need AC. Using Cxa3070 and vero 10 and 29s so heat won't be as much of an issue. Trying to figure it out so I can flower.
 
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purplelicious

purplelicious

Well-Known Member
avnewb said:
So ur sucking from inside grow room and blowing exhaust outside grow room with ozone generator? Tried to do a sealed room but think im just going to carbon filter maybe ozone generator in exhaust to adjacent unfinished room. Dont think I will need AC. Using Cxa3070 and vero 10 and 29s so heat won't be as much of an issue. Trying to figure it out so I can flower.
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I'm just using a scrubber inside the room. No air is vented out. Most people would say there is no air exchange, or something like that. I'm not trying to exchange air, I want to keep it in. Air will get sucked in or pushed out through every crack and crevice you think is sealed, smell is hard to deal with no matter what you do. If you can run a room without exhausting and it can stay cool,with an internal scrubber, that is the best bet to keep in odors.
 
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avnewb

Well-Known Member
Ive got approx 450cuft room split into veg and flower so pretty small.

Tried to do sealed room but not working and still in veg and smell getting out. About to add more lights so would either have to use ac or exhast vent to deal with heat.
Using diy cob leds (cxa3070s, vero 10s and 29s) so heat is not a huge issue. Smell is all I am concerned about and temps will be fine once there is an exhaust.

Plan is to get a Hyper fan and I guess a Phresh carbon filter unless there is something better. Was looking at the green gator filters but price is even more.

Also looked at iPower filters as cheap but read some bad reviews on here.
Also looked at Foothills filters or DIY options but running out of time as need to start flower this week cause plants are getting too tall so just need ti make a decision and buy something.

I think a 6in Hyper fan would work for $142. Could go with 16" or 24" filter for total of $269 or $284 (I would go with 24")

I could do a Y to two filters but fugure cost would go up. I just plan to use pvc pipes with two 90s on each end (with black paint on inside if req) to allow air to flow beteween flower and veg room but not allow light to get thru.

More expensive option would be to go with an 8in Hyper fan run at 30% so approx 200 cfm. Really slow so really quiet. Still prob use more power than the 6in but not really a huge amount anyways (35w vs 75w). It is $176 so with a 24" or 39" phresh filter would be kike $333 or $368. Think 8in would be nice but overkill. The 39in filter would also be nice as I really need there to be no smell as it will be exhausted into adjacent unfinished room. I can put an Ona gel in exhaust like above post if needed. I dont think noise will be an issue with either fan.

Also do I want any intakes or just allow air to seep in thru cracks. I had planned to use 2in soffets as intake holes.

Have to figure out where to put filter as I cant fit in flower room or will get in the way of light.
 
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