In-line fan filter/dust cover

Greengrouch

Greengrouch

Well-Known Member
I have an 8in fan filter combo in my 8x4. Filter takes up a lot of ceiling height so I want to push air out of the tent through it. So I need something to keep particulates from caking up on the inside. Does anyone make a dust cover I can put on the inside end of the fan? I could probably rig something up with a cheesecloth and a duct clamp, but I’d prefer something cleaner looking/purpose built.
 
Billy the Mountain

Billy the Mountain

Well-Known Member
Greengrouch said:
I have an 8in fan filter combo in my 8x4. Filter takes up a lot of ceiling height so I want to push air out of the tent through it. So I need something to keep particulates from caking up on the inside. Does anyone make a dust cover I can put on the inside end of the fan? I could probably rig something up with a cheesecloth and a duct clamp, but I’d prefer something cleaner looking/purpose built.
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It's unlikely that the inside of your fan would get caked up with dust; 99.9% of the dust will be blown through the fan.
Why not simply use a appropriately-sized carbon filter if dust buildup is a concern?
Even an old, used one would be sufficient for your needs since controlling dust, not smell, is your objective.
 
Greengrouch

Greengrouch

Well-Known Member
Billy the Mountain said:
It's unlikely that the inside of your fan would get caked up with dust; 99.9% of the dust will be blown through the fan.
Why not simply use a appropriately-sized carbon filter if dust buildup is a concern?
Even an old, used one would be sufficient for your needs.
Click to expand...
im gonna be exhausting through the filter on the outside of the tent, it’s the right size, just when I hang it in the tent I lose ceiling height so instead of pulling air through the filter from the outside, I’ll be pushing air from the inside. Basically I need to put something over the fan to do the job of the cloth prefilter that keeps dust etc from clogging the pores on the filter.
 
coreywebster

coreywebster

Well-Known Member
Of course you lose ceiling height, that's the way it is.

However if you want to use the filter the wrong way around you can buy the dust covers for the brand of filter and cut it up to make a smaller filter for the inside.
 
Billy the Mountain

Billy the Mountain

Well-Known Member
Greengrouch said:
im gonna be exhausting through the filter on the outside of the tent, it’s the right size, just when I hang it in the tent I lose ceiling height so instead of pulling air through the filter from the outside, I’ll be pushing air from the inside. Basically I need to put something over the fan to do the job of the cloth prefilter that keeps dust etc from clogging the pores on the filter.
Click to expand...
Gotcha

Some coarse pre-filter material could be placed over the input

You should be aware that carbon filters are much more efficient when air is pulled through rather than pushed out
 
Greengrouch

Greengrouch

Well-Known Member
Billy the Mountain said:
Gotcha

Some coarse pre-filter material could be placed over the input

You should be aware that carbon filters are much more efficient when air is pulled through rather than pushed out
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Yeah, I’m assuming I’m going need to replace the filters more often, probably 2x a year instead of once. Not a huge deal unless they get a lot more expensive.
 
Greengrouch

Greengrouch

Well-Known Member
J

JakStraw from Wichita

Active Member
Billy the Mountain said:
It's unlikely that the inside of your fan would get caked up with dust; 99.9% of the dust will be blown through the fan.
Why not simply use a appropriately-sized carbon filter if dust buildup is a concern?
Even an old, used one would be sufficient for your needs since controlling dust, not smell, is your objective.
Click to expand...
Appliance filters for hoods above your range, they are cheaper and fit perfect GE, LG, Vent-a-Hood ect they all fit and work well but they are expunged quickly due to small carbon foot print provided
 
Nizza

Nizza

Well-Known Member
An intake pre filter would prevent dust from going through the tent in the first place. Ac infinity makes some nice boxes that accept standard furnace filters, but you could also buy a standard hvac filter box and rig it up if you have the tools.
 
Greengrouch

Greengrouch

Well-Known Member
coreywebster said:
The dust covers are designed to be put in a washing machine and reused.
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I know lol, I mean the actual carbon filters will need replaced more often with the air pushing out the filter instead of pulling in. I usually change my fabric prefilter every couple weeks.
 
Greengrouch

Greengrouch

Well-Known Member
Nizza said:
An intake pre filter would prevent dust from going through the tent in the first place. Ac infinity makes some nice boxes that accept standard furnace filters, but you could also buy a standard hvac filter box and rig it up if you have the tools.
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It’s not the outside dust coming in I’m worried about, I keep a pretty clean house and have an air purifier in the grow room, it’s potting mix coming off the pots. Which I could honest probably solve with a bit of mulch or even some kind of jerry rigged lids. I’m probably just high and being difficult though
 
evergreengardener

evergreengardener

Well-Known Member
Greengrouch said:
It’s not the outside dust coming in I’m worried about, I keep a pretty clean house and have an air purifier in the grow room, it’s potting mix coming off the pots. Which I could honest probably solve with a bit of mulch or even some kind of jerry rigged lids. I’m probably just high and being difficult though
Click to expand...
If you want a intake filter you have many options from cheap range filters from any hardware store, cold air intakes made for cars or even specific to canna built pre filters here’s one mad from can-fan

ecogardensupply.com

Can-Fan Intake Filter 8"

Can-Filter® Intake Filters are your first line of defense against incoming contaminants. Made with a galvanized sheet steel housing. Easily change MERV-5 filter insert with toggle type fasteners on the top of the filter housing. Comes with a MERV-5 mesh filter that blocks pollen, dust, bugs and...
ecogardensupply.com ecogardensupply.com
 
1

1212ham

Well-Known Member
Greengrouch said:
I know lol, I mean the actual carbon filters will need replaced more often with the air pushing out the filter instead of pulling in. I usually change my fabric prefilter every couple weeks.
Click to expand...

No problem, setup your carbon filter as an inline filter by putting it in a tote or cardboard box. Cut two holes, put the flange through one and connect to fan. Connect a piece of duct to the other hole and run it to the tent. You're done!

Since almost all flex duct is spiral, make one of those holes a little under size and screw the duct in. Seal and secure with duck tape if needed.
To get the pre-filter out of a cardboard box for a wash, just cut the tape and reseal with painters tape. Or make a removable cover.
 
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