duct join

[ktm250]

Im using a SUNON HYDROPONIC FAN 120MM and am wondering if a 250mm duct joiner will be suitable for my box.i will be using a 250mm ducting and 250mm odorsok carbon filter.Is this fan the right one i should use?And how do i connect the duct joiner to the side of my growbox?Pics of the fan and duct joiner below.

[Indycar]

If your pushing or pulling air thru an odorsok or normal scrubber. You'll find ya might need a inline centrifugal fan. That fan in one of your pics might be alright for moving air around inside the cab. But yeah, that one you have at the moment is pretty well limited to moving unrestricted air flow. You'll need a fan with some serious suction to pull/push air thru a carbon scrubber, due to the restriction it creates.

 

To connect the duct joiner to the side the growbox. Well, that depends on what the growbox is made out of, say if it's an old wardrobe. I'd mark out the hole using the joiner as template and cut it out with a jigsaw, then slip it into place and seal either side with some sort of bonding glue. I usually use "No more Nails" made by Selleys. It comes in a tube like silicon does 'n only costs about $5 a tube.

[jimbojones5678]

That size fan won't cut the gravy mate, and I suggest going with a centrifugal like Indy said....

but if you are going to use it then you can get reducers that will increase the duct size through flanges, but it would be a lot of bother, I'm sure that you could hook up something to join them - just make sure it's air tight.

 

Jimbo

[loylty gets u nothing]

yep u gunna need some strength mate

that fan imo is really only good for air in

a 250mm odoursok will require a 250mm centrifugal fan

i thought i could get away with a 150mm x 400mm odoursok

on a spectrun 150mm airjet fan just an inline/axial

it pulls air threw yep

but at a real slow rate and imo is too much draw on the fan

im upgrading to a 200mm centrifugal with a duct reducer till this odoursok dies

then ill run the 200mm

trust me mate wen i say that odour control is ya biggest issue

u need to have faith and be able to trust ya extraction system

and honestly i cant see that fan doin anything but being a fire hazard

all the best hope u get something from the info in these posts here

billoizmske..

 

hers a pic of me RS150mm can fan

with a 150x600mm odoursok

not the clearest pic sorry

[Tom]

The fan will be fine if you are doing a small grow using fluorescent lighting but if you are using HID lights then, unless you live in a cold climate, you will need something with a lot more power than that fan to get rid of the heat they generate.

 

If you give us a description of your grow room we could answer your questions a little better.

 

[Al B. Fuct]

Axial fans, the sort with blades like flower petals,

 

http://www.hygrow.net/product_images/large/hgt30.jpg

(Spectrum HGT30, 350mm)

 

can move tons of air as long as they are not working into a lot of restriction or static pressure as is caused by carbon filters, Odorsoks or long duct runs with 90 degree bends. When pressure in the duct exceeds a certain level, the pressure will escape backward through the gaps between axial fan blades. When this condition occurs, axial blades 'stall' like an aircraft wing, which will heavily load the motor but move little air.

 

Centrifugals have very small gaps that they force air through, developing significant pressure on the outlet without overloading the motor.

 

http://www.hygrow.net/product_images/large/c200.jpg

(Spectrum Customline C200, 200mm)

 

Centrifs have to be made to tighter tolerances so the impeller blades clear the fan housing by a very specific distance and the fan rotors have to be well balanced to avoid contacting the housing, thus centrifs are normally more costly than similar sized axials.

 

However, there's nothing like a centrif when you have to push air through a long bendy duct or a filter. You simply can't depend on the CFM rating of an axial if it is pushing into a high static pressure. Long as you don't have a wombat jammed in your exhaust duct, a centrif will move its rated flow.

[jimbojones5678]

Long as you don't have a wombat jammed in your exhaust duct, a centrif will move its rated flow. smile.gif

Hahahahahahahaha!!!!!! That's funny shit man.

 

Jimbo

[Al B. Fuct]

dude, you ever tried to get a fat-arsed wombat out of your exhaust duct?

 

http://www.strategicresources.com.au/upload/db_pages_pic_30.gif

 

Took two crews of fireys and the Jaws Of Life to get Fatso out of my friggin' ductwork last autumn.

[cranky]

almost bought this "axial fan" on ebay axial fan ------->http://i2.ebayimg.com/02/i/000/ab/ef/e0b6_1.JPG

 

 

 

 

 

 

 

 

yes its a boeing jet "axial fan"...........the words "axial fan" can mean so much, from something computer sized to something off an earoplane.

 

although I think the wombat would be in troble .............

Edited July 27, 2007 by cranky

[Al B. Fuct]

cranky, you know, that looks like a starter fan for an APU. Yeah, I think the wombat would become womburger.