Bionik Kronik
Member
For space purposes I'd rather have it push through than pull through, but I'll have the scrubber attached directly to the inline fan.
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Does carbon scrubber direction matter?
- Thread starter Bionik Kronik
- Start date
Pulling is better but, if you have to push, push. As long as you maintain negative pressure you'll be fine.
pulling uses the prefilter; pushing not so much... if you pull the air through the lights and exhaust it out you'd only need a thermostat to control temps as the air won't smell.. fan hooked up to filter not hooked to lights works well for ordure control in the room as well; good luck
I have had my stanley pushing thru my homemade scrubber (8" to 6" reducer, 2" thick carbon bed, about 20" long) for nearly 4 years. I've changed the carbon several times in this span.
The first scrubber I built was too small (about 10" long) and created too much back pressure to cool the cab and create a negative pressure environment effectively.
I made a new scrubber, doubling the length to about 20". This allowed for proper flow and now the door on my fridge-cab gets sucked closed with some force. Of course, my scrubber and the stanley are probably overkill for my small fridge, but works very well for me for several years.
I would say, if you have a fan that has good pressure (blower, sq. cage, vortex) and you size the filter large enough, you should have no problems pushing......whats more: your exhaust stream is nearly silent because of the filter on the end. If you pull thru and exhaust openly, you get that roaring air movement sound.
The first scrubber I built was too small (about 10" long) and created too much back pressure to cool the cab and create a negative pressure environment effectively.
I made a new scrubber, doubling the length to about 20". This allowed for proper flow and now the door on my fridge-cab gets sucked closed with some force. Of course, my scrubber and the stanley are probably overkill for my small fridge, but works very well for me for several years.
I would say, if you have a fan that has good pressure (blower, sq. cage, vortex) and you size the filter large enough, you should have no problems pushing......whats more: your exhaust stream is nearly silent because of the filter on the end. If you pull thru and exhaust openly, you get that roaring air movement sound.
Philosophelon
Member
If you use a prefilter on the inside of the can, it's pretty much the same thing as pulling air through, just going the other direction.
That being said, if you are pushing air through the filter, it has to be mounted outside your growroom. Otherwise, you will have positive pressure in your room and smell will leak out big-time.
That being said, if you are pushing air through the filter, it has to be mounted outside your growroom. Otherwise, you will have positive pressure in your room and smell will leak out big-time.
If ya push thru - ya gotta filter the air going into the filter, otherwise lint can clog the inside - where ua can't clean.
HTH
HTH
G
Greyskull
i have a canfan sitting on top of my carbon filter in the middle of the room pushing the air thru it constantly scrubbing the air in my room....
i have seen set ups with 2 carbon filters (the HUGE ONES), each with its own fan... one pulling from one filter and another pushing it thru the other filter. thats nice...
and no smell emits as long as the room is sealed.
i have seen set ups with 2 carbon filters (the HUGE ONES), each with its own fan... one pulling from one filter and another pushing it thru the other filter. thats nice...
and no smell emits as long as the room is sealed.
Philosophelon
Member
I don't think the dude's room is sealed or he would just pull anyway, because it's the same amount of space whether you're pushing or pulling if your scrubber is recirculating because your fan is just sitting on the filter. I assume that he is venting the room if he is concerned with fan direction.
By the way, Greyskull, why do you push air through your carbon filter instead of just pulling and using the factory prefilter?
I can't answer for greyskull but, I push thru the scrubber because I intake thru the light hoods - then to the fan and exhaust into the filter - which is in another room.
G
Greyskull
I am just scrubbing the air in my room, not ventng & scrubbing.
When I first got my can filter and tried to set it up like my mentor's, I put the filter on the ground and placed the fan on top of it so that the fan was pulling thru it - so I could "use" the prefilter. When my mentor came by to check on my progress before i flowered my first crop, he looked at my scrubber set up, flipped the fan over so it was pushing thru the filter, and simply said "this is the way you use the scrubber in the room". Dude has been growing huge for 20 years so I just followed along since i was doing everything to mirror him & his success (just on a smaller 2 light scale instead of 12 lights).
I totally admit to not being original with my room design & functionality... I am just doing what my mentor does. ha ha
Philosophelon
Member
Hmmm... That is interesting, and I wonder if there is some benefit to pushing.
I use it pulling, just blowing straight up. I think it helps circulate CO2 within the room, as it's heavier than air.
I wonder if it circulates better with the fan pushing?
Perhaps it's less noisy?
Anyway, if ya get a chance, ask him
.
Bionik Kronik
Member
Here is what I'm talking about.
Bionik Kronik
Member
The exhaust fan pushes air through the carbon scrubber. The fan on the bottom is my intake, direct from the a/c box.
Can you tell which one is mine?
Can you tell which one is mine?
E
Eminem
the filter will work either way, if you push or pull, it makes no difference. You do need to use a prefilter if you push through.
Now pushing/pulling may have an effect on your cab/space negative pressure etc. But the air that comes out the filter will be the same if you push or pull.
http://www.hydrotv.com/showhd1.html Thats what the guys from Can Fan say
Now pushing/pulling may have an effect on your cab/space negative pressure etc. But the air that comes out the filter will be the same if you push or pull.
http://www.hydrotv.com/showhd1.html Thats what the guys from Can Fan say
okanogan green
Member
Prefilter for Can 33
Prefilter for Can 33
I am about to hook-up my Can 33 scrubber. I am thinking of having the filter outside the tent and pushing air through it. What is the best way to prefilter the air going into the fan and out through the filter? Thanks alot. Regards.
Prefilter for Can 33
I am about to hook-up my Can 33 scrubber. I am thinking of having the filter outside the tent and pushing air through it. What is the best way to prefilter the air going into the fan and out through the filter? Thanks alot. Regards.
FrostyGreen
New member
I've used a Can 33 with a 172cfm Vortex pushing my air thru it with no problems ever for over a year. I've called CAN directly and spoke with a rep there. They say it doesn't matter to push or pull as long as you put the prefilter on the inside if you push your air thru it. I cut mine down cause the diameter is smaller of the inside of course. The preforated metal on the inside has enough roughage(unfinished side) to keep it in place without any rigging up. Make sure to measure twice and cut once cuz it's easy to overcut and make it too small leaving a gap with no prefilter. Always you a prefilter to prolong the life of the carbon. Hope this helps!!!
Direction doesnt matter..
Just need to prefilter...
-N.Kron
Just need to prefilter...
-N.Kron
okanogan green
Member
Prefilter for Can 33
Prefilter for Can 33
Hello there. What material is suitable for use as a pre-filter? Many thanks. Cheers
Prefilter for Can 33
Hello there. What material is suitable for use as a pre-filter? Many thanks. Cheers
I dunno,, maybe FILTER CLOTH? - like the stuff they sell at home depot and Lowes in the FILTER isle.
Another option might be ladies nylons - but that may not work for all particular designs.
