The Ultimate Odour Control Thread
- Thread starter Arrid
- Start date
Daveindiego
Well-Known Member
Is it possible to grow up to 64 plants without an odor problem?
Daveindiego
Well-Known Member
I've decided that I'm going to seal off portions of the room with floor to ceiling visqueen plastic, and use an air scrubber. There is no way I could have done this with 64 plants inside a room, just using an AC.
RangiSTaxi
Well-Known Member
fosterlogan6731
New Member
Hiii...all.
Alrighty, I am back with an update. Currently growing 3 plants. Durban Poison, Pineapple Express and Kosher Kush. They are all 12/12 from seed.
Durban Poison - March 3 sprout. Currently in flowering. It is forming up nugs. Little to no smell.
Pineapple - First two leaves died, in veg. Smells CRAZY already. Shit scares me.
Kosher - same as Pineapple, also smells CRAZY.
But!!! Lets come to the topic of Ozone. I can tell you, without Ozone, the whole room smells of them. As soon as I turn on my 200mg/h Ozone, the smell is gone in under 1 minute. My room is small but not so small. I keep the ozone on for 10 to 20 minutes max every hour. Room smells fresh and clean everytime I enter.
When I put my nose up to the growbox, I do smell the CRAZY smell. So it is safe to say that ozone doesn't enter into the box so much. Fine by me. I need to room to smell clean, not the box.
As soon as I open the box, I am bombarded by the smell, which dies in 20 secconds with Ozone.
Seems to me like this will work fine. Fingers crossed. I do have a 600mg machine cleaning my water and for emergencies further down flowering if needed.
Durban Poison - March 3 sprout. Currently in flowering. It is forming up nugs. Little to no smell.
Pineapple - First two leaves died, in veg. Smells CRAZY already. Shit scares me.
Kosher - same as Pineapple, also smells CRAZY.
But!!! Lets come to the topic of Ozone. I can tell you, without Ozone, the whole room smells of them. As soon as I turn on my 200mg/h Ozone, the smell is gone in under 1 minute. My room is small but not so small. I keep the ozone on for 10 to 20 minutes max every hour. Room smells fresh and clean everytime I enter.
When I put my nose up to the growbox, I do smell the CRAZY smell. So it is safe to say that ozone doesn't enter into the box so much. Fine by me. I need to room to smell clean, not the box.
As soon as I open the box, I am bombarded by the smell, which dies in 20 secconds with Ozone.
Seems to me like this will work fine. Fingers crossed. I do have a 600mg machine cleaning my water and for emergencies further down flowering if needed.
williamhanson4041
Member
Hey what's up
RangiSTaxi
Well-Known Member
Just be careful Ozone can be hazardous to human health
In moderation it is actually beneficial. Let me tell you, my allergies are much better now. Stuffy nose and all that, gone.
damian0536
Active Member
Hi
So just about to get a filter system but not sure if I'm getting correct one. Heres how I'm working this out.
W×L×H = 20ft ÷ 5 = 4 cubic feet
Or 35m3/h?
Am I making this this complicated? If anyone could tell me what fan would be needed that would help.
Space is 60×60×140cm, 2 plants
So just about to get a filter system but not sure if I'm getting correct one. Heres how I'm working this out.
W×L×H = 20ft ÷ 5 = 4 cubic feet
Or 35m3/h?
Am I making this this complicated? If anyone could tell me what fan would be needed that would help.
Space is 60×60×140cm, 2 plants
cookie master
Well-Known Member
Its gonna definitely be impossible to harvest 64 plants odor free. Maybe with a mild strain, but nobody likes those anymore.
calliandra
Well-Known Member
AFAIK, we need to exchange all the air in the growspace every 5 minutes for nice air.
so thats
60x60x140 = 0,5m³ volume of the closet
x 12 (because there are 12 x 5 minutes in an hour) = 6m³/hr
+ 30% to account for carbon filter resistance = 7,8m³/hr.
that's 275 cuft/hr, if that helps find a fan where you are?
damian0536
Active Member
Okay so I have just ordered a 4" with 100m3/h so that's more than enough right?
calliandra
Well-Known Member
yup lol
you can always reduce the fan speed with a step-down transformer or dimmer, so you'll have reserves in case you ever need to upgrade spacewise too
damian0536
Active Member
Ahh awesome thanks for that, top girlyup lol
you can always reduce the fan speed with a step-down transformer or dimmer, so you'll have reserves in case you ever need to upgrade spacewise too
haze010
Well-Known Member
If you are using anything other than carbon filtration you are doing it wrong.
This should answer most questions.
https://www.drieaz.com/uploads/deca/gtas.pdf
Thats what professionals use who have to deal with things a hell of a lot worse than a pot plant.
This should answer most questions.
https://www.drieaz.com/uploads/deca/gtas.pdf
Thats what professionals use who have to deal with things a hell of a lot worse than a pot plant.
haze010
Well-Known Member
Wrong, why do people who dont have the knowledge say its impossible. The volume of air is the critical point, not how contaminated that air is. See above documentation if you want *actual* evidence. Carbon filtration can eliminate the smell of raw sewage let alone pot plants.
haze010
Well-Known Member
From page 7 of above documentation regarding carbon filtration for smells.
Optional carbon filters
Most air scrubbers include space in the pre-filter stage for an optional carbon filter. The carbon filter captures the gas- and vapor-phase molecules that the human nose detects as odors. This is accomplished through a process called adsorption, where the gaseous molecules are physically attracted to the surface of the carbon. The greater the surface area of the carbon, the more effective the filter is at adsorbing odor-causing molecules. Activated carbon is the preferred material for odor removal because it has a very large surface area. Just one gram of activated carbon may have as many as 2,000 square meters of surface area to adsorb gaseous odor molecules. The service life of a carbon filter depends on the type and concentration of the odor. Your sense of smell will let you know when it's time to replace the carbon filter.
Your anecdotal evidence is incorrect.
Optional carbon filters
Most air scrubbers include space in the pre-filter stage for an optional carbon filter. The carbon filter captures the gas- and vapor-phase molecules that the human nose detects as odors. This is accomplished through a process called adsorption, where the gaseous molecules are physically attracted to the surface of the carbon. The greater the surface area of the carbon, the more effective the filter is at adsorbing odor-causing molecules. Activated carbon is the preferred material for odor removal because it has a very large surface area. Just one gram of activated carbon may have as many as 2,000 square meters of surface area to adsorb gaseous odor molecules. The service life of a carbon filter depends on the type and concentration of the odor. Your sense of smell will let you know when it's time to replace the carbon filter.
Your anecdotal evidence is incorrect.
haze010
Well-Known Member
Just a follow up here, im a professional in the hazmat industry with almost 20 years experience, i linked basic documentation on air scrubbing that provides all the guidelines for scrubbing smells and even toxic gases from the air to safe levels.
The science behind it and the math on how to calculate what cfms and ach (complete air changes per hour for cubic volume of the space) are in that documentation and how to do calculate what you need for any space.
I have personally helped build negative air containments as large as a 4 story apartment buildings so there is likely no question i cannot answer.
Id be happy to answer any questions people have about Negative air setups, air scrubber setups, carbon filtration ect and can provide professional industry documentation for it.
I will try to never respond with an opinion, but with science and math along with industry professional documentation like the dri-exe air scrubber guide i linked above.
People around this site have helped me tremendously on subjects i knew nothing about, this is the one thing i can give expert advice on and its my way to contribute back. So please feel free to fire away any questions and i'll do my best to answer them.
The science behind it and the math on how to calculate what cfms and ach (complete air changes per hour for cubic volume of the space) are in that documentation and how to do calculate what you need for any space.
I have personally helped build negative air containments as large as a 4 story apartment buildings so there is likely no question i cannot answer.
Id be happy to answer any questions people have about Negative air setups, air scrubber setups, carbon filtration ect and can provide professional industry documentation for it.
I will try to never respond with an opinion, but with science and math along with industry professional documentation like the dri-exe air scrubber guide i linked above.
People around this site have helped me tremendously on subjects i knew nothing about, this is the one thing i can give expert advice on and its my way to contribute back. So please feel free to fire away any questions and i'll do my best to answer them.
calliandra
Well-Known Member
Thank you for offering to help and indeed I do have a question regarding air exchange.
In the documentation you posted, they speak of ACH, air changes per hour.
I learned we need to change the air for plants every 5 minutes, so I need 12 ACH.
Is this correct or do you do otherwise?
Also, when calculating the fan's performance, how do you factor in the resistance of the carbon filter?
Again, I had picked up a rule of thumb of 30%.
So I'm just building a little veg closet, 0.50 x 1 x 0.96m (that's 1.6 x 3.3 x 3.1 ft) in dimension.
So my volume is 0.48m³, times 12 changes per hour = 5.76m³/hr
Adding in the filter's resistance ( x1.3) takes me to 7.5m³/hr or 264cuft/hr or 4.4CFM ?!?
Does that sound right or am I juglling numbers in lalaland?
Cheers!