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Carbon scrubber not holding in all the smell

mj23

Member
Im about 5 weeks into veg and I noticed when I got home I could smell the herb. It wasnt horrible but I could smell it right when I walked in. I notice when my fan is on thats what happens. Ive read good reviews on my scrubber. Question, does your scrubber hold all the smell in even in the middle of flowering? Im a bit concerned about this... :/
 

zor

Active member
as long as your filter is new and properly matched for cfm of your fan and your humidity is not >70%, the filter should work.

if the above are all in check, id check for any airleaks in your ducting, especially if you are pulling with your fan at the end of an exhaust run
 

Hammerhead

Disabled Farmer
ICMag Donor
Veteran
Over kill on scrubbing is a good thing. I have a 4" and a 6" I dont get any smells with this setup.
 

Aerohead

space gardener
Veteran
What kind of scrubber? If you have a quality scrubber and you are still smelling your ladies, your room isn't under negative pressure. Meaning, the room needs to be capable of exhausting more air than it can take in. So, good scrubber and neg pressure = no smell.
 

mj23

Member
It may be my setup.It Is a stand alone and im not venting this second. The door is just closed and a small crack underneath. I wasnt thinking when I got the light. Its wasnt ne witht he screen and ducting holes on the side. Its been cold enough that its not necessary as of right now. Im going to get some lights that can be vented soon. It contains it pretty well but I cant have any smell or else ive got to can the project. My scrubber is a LUMA
 

WasntMe

Member
1. Dimensions of grow area?

2. CFM rating and duct size of fan or fan's make and model?

3. CFM rating and duct size of scrubber or scrubber's make and model?

4. Is it insulated duct?

5. Are you using aluminum tape and properly sealing each connection?

6. What is the Humidity level in the grow area?

7. How is fresh air getting into your grow area or is the area a sealed room?

8. Is there negative pressure?

9. Tell us how your exhaust is set up.....
 

PuReKnOwLeDgE

Licensed Grower
ICMag Donor
Veteran
NEGATIVE PRESSURE, only air escaing the room that did not leave via the filter can stink, therefore you do not have enough negative pressure in the room and air is escaping. Unless your sealed, then you need to seal better.
 

mj23

Member
1. Dimensions of grow area?

8x10

2. CFM rating and duct size of fan or fan's make and model?
LUMA 6 inch Insulated, 440 cfm. Its a stand alone with no ducing. The fan is flush and tight s the seal is good.

3. CFM rating and duct size of scrubber or scrubber's make and model?

4. Is it insulated duct?

5. Are you using aluminum tape and properly sealing each connection?

6. What is the Humidity level in the grow area?

not sure about this. I need to get a gauge for this. I will be able to keep it down if it is indeed above 70 when I get me vented lights.

7. How is fresh air getting into your grow area or is the area a sealed room?
Sealed room
8. Is there negative pressure?

dont believe as its a sealed room. Im going to have a fan venting the hot air out in a week or so. that should get my humidty down and Im also going to get a "draft guard to get teh bottom sealed better

9. Tell us how your exhaust is set up.....



WasntMe;4221285]1. Dimensions of grow area?

8x10

2. CFM rating and duct size of fan or fan's make and model?
LUMA 6 inch Insulated, 440 cfm. Its a stand alone with no ducing. The fan is flush and tight s the seal is good.

3. CFM rating and duct size of scrubber or scrubber's make and model?

4. Is it insulated duct?

5. Are you using aluminum tape and properly sealing each connection?

6. What is the Humidity level in the grow area?

not sure about this. I need to get a gauge for this. I will be able to keep it down if it is indeed above 70 when I get me vented lights.

7. How is fresh air getting into your grow area or is the area a sealed room?
Sealed room
8. Is there negative pressure?

dont believe as its a sealed room. Im going to have a fan venting the hot air out in a week or so. that should get my humidty down and Im also going to get a "draft guard to get teh bottom sealed better

9. Tell us how your exhaust is set up.....[/QUOTE]
 

mj23

Member
I need to look at more setups on thsi site to make sure im doing this right or I have no business doing this. Too much risk. Thanks for all the help guys!
 

WasntMe

Member
1. Dimensions of grow area?
8x10 How tall? .. so we can calculate volume.

2. CFM rating and duct size of fan or fan's make and model?
LUMA 6 inch Insulated, 440 cfm. Its a stand alone with no ducing. The fan is flush and tight s the seal is good do you have a speed controller? see how fan and scrubber ratings don't match well...

3. CFM rating and duct size of scrubber or scrubber's make and model? Luma 6inch 340 cfm

4. Is it insulated duct?
Its a stand alone with no ducing

5. Are you using aluminum tape and properly sealing each connection?
seal is good

6. What is the Humidity level in the grow area?
not sure about this. I need to get a gauge for this. I will be able to keep it down if it is indeed above 70 when I get me vented lights.

7. How is fresh air getting into your grow area or is the area a sealed room?
Sealed room ... Its just a closed door but the is a crack underneath. I need to seal the room better


8. Is there negative pressure?
dont believe as its a sealed room. Im going to have a fan venting the hot air out in a week or so. that should get my humidty down and Im also going to get a "draft guard to get teh bottom sealed better ...

9. Tell us how your exhaust is set up.....
 

resinryder

Rubbing my glands together
Veteran
Maybe you're pulling the air through the filter to fast. If it's going through too fast the odor won't have enough residence time going through the carbon to react. Put a speed controller on the fan, slow it down a bit and that should take care of the problem. I have to do this with my set up. Otherwise the odor will pass right on through.
I know, I know. You say, but my filter is rated for xxx cfm and that's what my fan pulls through it. Mines rated for over 1100 cfm and my fan pulls 1019cfm. It'll pull odor through it every time if I run it at full speed. Slowed down it works. Try it out and see what happens.
Now, as others have noticed and mentioned, you're not exhausting out of the room.
You're pulling so much air through the fan/filter that you're pressurizing the room. Over pressure so to speak. What ever smell that is there is being pushed out the room by whatever means it can find. This push out of air is also adding to what you are now smelling. Air is like water. If there's a way out it'll find it. Around the door, the frame, the window, window frame, etc.
Hope that made a little bit of sense. I'm a bit stoned blurry at the moment.
 

mj23

Member
1. Dimensions of grow area?
8x10 How tall? .. so we can calculate volume.

2. CFM rating and duct size of fan or fan's make and model?
LUMA 6 inch Insulated, 440 cfm. Its a stand alone with no ducing. The fan is flush and tight s the seal is good do you have a speed controller? see how fan and scrubber ratings don't match well...

3. CFM rating and duct size of scrubber or scrubber's make and model? Luma 6inch 340 cfm

4. Is it insulated duct?
Its a stand alone with no ducing

5. Are you using aluminum tape and properly sealing each connection?
seal is good

6. What is the Humidity level in the grow area?
not sure about this. I need to get a gauge for this. I will be able to keep it down if it is indeed above 70 when I get me vented lights.

7. How is fresh air getting into your grow area or is the area a sealed room?
Sealed room ... Its just a closed door but the is a crack underneath. I need to seal the room better


8. Is there negative pressure?
dont believe as its a sealed room. Im going to have a fan venting the hot air out in a week or so. that should get my humidty down and Im also going to get a "draft guard to get teh bottom sealed better ...

9. Tell us how your exhaust is set up.....

8 foot ceiling
 

Hammerhead

Disabled Farmer
ICMag Donor
Veteran
slowing down the fan does work very well. Even if you are running it as per spec's. I believe slower is better. My 4" can 9000 will run 80cfm and my 6" can 33 will run 240cfm. Here are my specs on the filters


Can 9000:
Contains 4 Kg. Carbon
Recommeded Room Size - 300 - 400 cubic feet
Recommended Can-Fan - 4" Low Output
This one usess a 80cfm

Can 33:
Contains 6 Kg. Carbon
Recommeded Room Size - 400 - 500 cubic feet
Recommended Can-Fan - 6" Low Output
This one is using a 240cfm

Fan Specs
1 x DFN-4: DUCT FAN, 4" IN-LINE, 80 CFM, W / POWER CORD
1 x DFN-6: DUCT FAN, 6" IN-LINE, 250 CFM, W / POWER CORD
 

inquest

Member
Resinrider and hammerhead got the right idea! I've had good luck with lowering the temps as well as adding a recirculating carbon filter inside of the room. That way the air passes through the filter over and over increasing contact time with the carbon. Also, if anything makes it through you can use a bit of ozone too, not real good for yer health in large amounts though. Plus if you look suspicious and cops smell ozone they'll figure your tryin to cover somethin up..... your mileage may vary.
 
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