Pc fan to ductwork connect? HOW?

Anyone have a good method of connecting a pc fan into ductwork to exhaust a growbox? 120mm square pc fan.
i hope to have it seal well because I want to use a carbon scrubber, and I'd like to set up a cooltube later, so I'd have one fan pulling air from inside the box through a carbon filter to keep fresh air coming in and keep odour away, and another pulling air through a cooltube. the colltube will pull air from outside the grow cab, over the bulb and exhaust out into the garage. Sound good? Could I make a manifold for the PC fan?

You could use 150mm silver ribbed duct (the concertina stuff) and simply put the fan inside the tube, after tearing off a few laps of the strengthing wire you can run electrical tape around the out side to seal the tube around the fan- or something like that ... i hope that makes cents- im mega ripped right now.
But n e ways it works fine for me.

maybe this:

remove the screw lugs on fan (4x) this then gives you a round fan body. test fit inside duct. use duct tape too add more bulk too fan body if needed too make a snugg fit. use a little two part contact glue ( hardener / adhesive mix) too set fan in place. a small hole in ducting will allow for fan cable too protrude out. and a little contact glue around the cabling hole will seal it back up. duct tape around outside will also seal the unit into duct and keep it in place.

you may want too look for a 12cm sythe fan. these are a round fan with round fan body normaly used too replace stock cpu cooler or too cool some of these extreme cpu heatsinks for huge overclocking.

run fan in duct for 24hrs atleast too remove leftover solvent and stop leaching into carbon filter and screwing it up.

then fit and hook up too carbon scrubber / grow area/room/tent

Tamzi

bazza- thanks for trying, it does kinda make sense. maybe you'll elaborate when you clear up a bit.

Tamzi- If I take the housing off the fan, wouldn't the motor come apat? I though it was all integral. But, maybe that will work, or maybe I could even dremel the square corners off the housing to leave me with a rounded fan housing?

a couple of thoughts:
first, you may want to go with another fan anyway. it takes a pretty strong fan to pull through a carbon filter and a light tube.
second, if this fan will work, you can get a square-to-circular connector at home depot that is made to connect ducting to a heating register. you'd have to play with it a little to fit perfectly, but at least you are starting with the right shape.

pacman123 said:

bazza- thanks for trying, it does kinda make sense. maybe you'll elaborate when you clear up a bit.

Tamzi- If I take the housing off the fan, wouldn't the motor come apat? I though it was all integral. But, maybe that will work, or maybe I could even dremel the square corners off the housing to leave me with a rounded fan housing?

Click to expand...

yes dremel square corners of try get the cut so it leaves a smooth rounded surface.

you can remove the whole fan cage. BUT fixing would be a problem. check a few PC sites, they now do fans with a round profile cage ( intel stock heatsink/fan) the fans cage is round

Thermaltake Silent CAT 120mm Case Fan - White A2329 at TigerDirect.com

the one above could be screwed onto cab, then have the duct glued/taped to the fans round body, and as desertrat has said your going too need a fair bit of cubic feet per min from those fans too vent into/through a carbon scrubber. may be better off with a 12v bathroom fan.

rep+1 to all you guys! I bought a great 151cfm 120mm fan from frozenCPU.com but i went to order a second one a few weeks later and they were out of stock! I'll chedck back. I've only seen bathroom fans rated up to 80cfm or so, probably better to go with the 151 cfm pc fan or a few 80 cfm pc fans?

Here are a few good ones:

pc fan 220cfm

pc fan 151

pc fan 141

Hope the pics help to clarify my way of doing it, no mess no fuss - and no bits and fiddy pieces to fit or buy.

I have never used this setup with a scrubber but have made a quite small one and intend to use a similar setup to run that.

this is a fan I bought at home depot this might help. 25.00

Bazza- Got it, thanks! That seems pretty straightforward, think I'll give it a try.

That Home depot fan I've thought about, but I can get pc fans that move almost TWICE as much air for about the same price!