Carbon Filters

ProPheT 216

ProPheT 216

Well-Known Member
Billy the Mountain said:
Filters are more efficient (less static pressure) pulling air through rather than pushing through. The surface area is not the same on the two opposing surfaces; the surface area on the outer circumference is dramatically larger than the inside surface. The filter can be used either way but efficiency will suffer, not to mention the problems from not using a pre-filter, which isn't possible when pushing air through.
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I use a filter for a 4 inch on the inside of a 6 inch. The surface area on the inside is smaller than the outside, but it goes thru every layer as is works its way thru the filter so wouldn't the surface area be equal once it has passed thru the entire filter? Drawing air thru looks like this \ / , more surface area first, pushing it thru like this / \ less surface area first. But in the end the volume of surface area is the same no?
 
sh0wtime

sh0wtime

Well-Known Member
Billy the Mountain said:
Filters are more efficient (less static pressure) pulling air through rather than pushing through. The surface area is not the same on the two opposing surfaces; the surface area on the outer circumference is dramatically larger than the inside surface. The filter can be used either way but efficiency will suffer, not to mention the problems from not using a pre-filter, which isn't possible when pushing air through.
Click to expand...
In other words: use a condom and always stick in the right way...
 
Billy the Mountain

Billy the Mountain

Well-Known Member
ProPheT 216 said:
I use a filter for a 4 inch on the inside of a 6 inch. The surface area on the inside is smaller than the outside, but it goes thru every layer as is works its way thru the filter so wouldn't the surface area be equal once it has passed thru the entire filter? Drawing air thru looks like this \ / , more surface area first, pushing it thru like this / \ less surface area first. But in the end the volume of surface area is the same no?
Click to expand...
What matters most for static pressure/airflow is the initial restriction. The surface area on the inside of the "donut" is substantially smaller than the outside and will allow less airflow at a given pressure. You're right though, in that for the air that does travel through the filter, the direction is irrelevant.
 
PopAndSonGrows

PopAndSonGrows

Well-Known Member
ALL the smell? -no. At least not just one filter.

Full neutralization of odor is possible, but takes more effort than just a carbon intake filter. You'll need to filter the intake AND exhaust airs, and in extreme situations an air scrubber (not cheap).

You can opt for "low odor" or "stealth" strains, there are many to choose from. This won't mean weak weed, either, just sayin.
 
Charles U Farley

Charles U Farley

Well-Known Member
Billy the Mountain said:
What matters most for static pressure/airflow is the initial restriction. The surface area on the inside of the "donut" is substantially smaller than the outside and will allow less airflow at a given pressure. You're right though, in that for the air that does travel through the filter, the direction is irrelevant.
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Remember, you are filtering out VOC's from the exhausted air, hopefuly not dust/dirt, so it's getting the maximum air flow through the filter that is most important. The largest 8" Terrabloom carbon filter with attached 8" EC back pressure compensated fan has worked exceedingly well for me, exhausting both an 8X4 and a connected 5X5 tent. It creates enough negative pressure to suck chrome off a trailer hitch:
1000006435.jpg

I can't afford to have anything taking up or impeding the headroom _inside_ my tents:
1000006436.jpg
And before the helpful crowd gets geared up to inform me I am over-feeding, over-watering these plants, the temp inside this tent when I took this picture was 48° and the temp inside the basement was 40°. And this is the sativa side of a reverse engineered Northern Lights, and if you're familiar with Northern Lights, you'll understand how atypical this is.

I've got to have the tent headroom inside and the smell has never, ever been a problem.
 
sh0wtime

sh0wtime

Well-Known Member
Charles U Farley said:
Remember, you are filtering out VOC's from the exhausted air, hopefuly not dust/dirt, so it's getting the maximum air flow through the filter that is most important. The largest 8" Terrabloom carbon filter with attached 8" EC back pressure compensated fan has worked exceedingly well for me, exhausting both an 8X4 and a connected 5X5 tent. It creates enough negative pressure to suck chrome off a trailer hitch:
View attachment 5338403

I can't afford to have anything taking up or impeding the headroom _inside_ my tents:
View attachment 5338404
And before the helpful crowd gets geared up to inform me I am over-feeding, over-watering these plants, the temp inside this tent when I took this picture was 48° and the temp inside the basement was 40°. And this is the sativa side of a reverse engineered Northern Lights, and if you're familiar with Northern Lights, you'll understand how atypical this is.

I've got to have the tent headroom inside and the smell has never, ever been a problem.
Click to expand...
You could still mount the filter in one of the corners and pull the air out, hard to see if there's an outlet behind that fan or not.
 
xox

xox

Well-Known Member
there are quality filters to be had id recommend kootenay filters, they used to be canlite but canlite is now garbage since they changed the quality of the carbon inside. when harvesting i run two filters one in the room filtering the air, then another filtering that air a second time but that filter creates a negative air space in the room as well
 
sh0wtime

sh0wtime

Well-Known Member
xox said:
there are quality filters to be had id recommend kootenay filters, they used to be canlite but canlite is now garbage since they changed the quality of the carbon inside. when harvesting i run two filters one in the room filtering the air, then another filtering that air a second time but that filter creates a negative air space in the room as well
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The 2 chamber design seems to be pretty universal.
If you're smart you're not looking for "the best filter on the market" but for one you can open up and refill, cause THAT's the best filter in my opinion.
 
oldsilvertip55

oldsilvertip55

Well-Known Member
TCH said:
Ac infinity now sells one that is refillable and it's in the ballpark price wise of the other filters that are comparable to it. I picked one up but haven't used it yet. My other filters all do their job for at least a grow. Some 2-3 grows.
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mine only runs during flower phase,4th grow on this filter ,average flower run at near 9/10 weeks.stepson can walk in and tell me when it's time to fire up the filtration!
 
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