Help slips with fans :)

[Guest]

So what makes this can fan so much better than the other fans below(is this one silent?)
CanFan 6" Inine Fan- 270CFM

$167.95
CanFan 6" Inine Fan- 270CFM
Click to enlarge
6" ducts, 3240RPM, 73 watts, 270CFM
Can-Fan® bring its innovation to market and sets a new standard for performance. The outstanding performance of our fans set it apart from the competition. Come pre-wired with an 8’ - 120 volt power cord. 5 year warranty.

better than these 2?
Flat Whisper Fan- 6"- 230CFM
[N736905G]

$19.99
Flat Whisper Fan- 6"- 230CFM
Click to enlarge
Rugged, durable, quite flat exhaust or intake fans, manufactured by Tidar. Rated for continuous duty, 120 Volt AC. Include power cord, but you must wire on your own wall plug. 230 CFM 59 Decibels@ 1 Meter. Includes Ball bearings.

6 In. 110VAC 250CFM In-Line Duct Fan
Model 3011
$33.99/Each
http://www.homedepot.com/webapp/wcs...langId=-1&catalogId=10053&productId=100396559


8 In. 110VAC 500CFM In-Line Duct Fan
Model 3012
$35.99/Each

http://www.homedepot.com/webapp/wcs/stores/servlet/ProductDisplay?storeId=10051&langId=-1&catalogId=10053&productId=100396544#reviews
http://www.homedepot.com/webapp/wcs...langId=-1&catalogId=10053&productId=100396544

I heard the home depot duct fan are crapp and will burn out in a month whats up with that ?

 

[cocktail frank]

you get what you pay for slips.
those axial fans are good to cool off your comp.
those home depot fans are good for nothing.
if you wanna do it right, go with the can fan

 

[Guest]

So i should not be even looking at the CFM on these fans unless they are the same type?, i thought cfm was cfm

 

[cesartime]

i dunno whats up with them, but a few yrs ago, i used a 4'' model of the in-line duct fan, and sure as shit about 1.5-2 months into its lifespan it took a shit on me, so i guess im not the only person that has had a bad experience with them.

However, I know the canfan or a vortex, or something of the like will deffinitely outperform any of the other fans you posted 10 fold.

by the way, vortex fans are dirt cheap on mdhydro.com i got my 8'' for under 200 bux i beleive.

 

[cocktail frank]

the smaller motors on the lil fans will work doubley hard when you put a hose on it.
static pressure will kill them.
i tried the home depot fans, believe me, theyre all in the trash from a day after i hooked em up.

 

[Guest]

Ok, now i have a few more ?'s my room is about 1,200cf, How many times an hour should all the air be removed and replaced if the room is filled with plants to keep enough o2 in the room.

 

[cocktail frank]

check my elect safety thread. there is a link in there for cfm sizing....i think
found it
http://www.jhlarson.com/ind_tables/hvac/calc_airflow.htm

 

[Neptune]

leme setcha straight slips...


the Axial fans are pimp and do move a lot of air for cheap, but it is pretty damn difficult to hook them to ventilation equipment and have a good seal. Those other "inline" booster fans are junk, total crap. they don't move air well, and are noisy as fuck.

get a can, vortex, ecoplus, tornado, etc.
pay the money, they last forever.

I use axials for room intake and other assorted tasks, they are designed to run continuously for years, and mine have... never a bad idea to keep a few around your grow room.

this is what I use.
http://kingsolar.com/catalog/mfg/dayton/6kd76.html

edit****
My room changes air(complete) every 5-7 minutes, and is ~ 900 cu. ft.
probably overkill, but I would suggest every 10 min for sure.

 

[Guest]

Well i got a vortex till i figureout more permanent ventalation ideas for bloom.

 

[Guest]

Yo Slips...I was taught to exchange the air in a room every 2 minutes or less and it has served me well. When I get to the high end of that it feels stagnant...with stale feeling/smelling air and potential humidity issues.

Absolutely ditto Neptune on the quality of fan thing. Cut corners where you can but buy the best when it's really important. One flower area I have set up exchanges the air in less than a minute. That 875 cf space has 2 450 cfm and 1 300 cfm intake and a 1200 cfm exhaust. There's currently also 2 300 and 1 450 cfm fan cooling the hoods. Everything runs on a combo of inexpensive thermostats and timers.

For me I've learned that in an open system you want a lot of heat generation so you can justify flowing a ton of air through. The best bud I do is usually in a space where you walk in it smells and feels like a fresh Spring day...no matter what part of the space you're in (get rid of the dead and hot spots)...even in the middle of Winter when it's freezing out.

Problem I've found is in creating a large amount of flowering mass in a space you get a lot of humidity about 2/3's into 'production'...only remedy lights on is air flow...and a lot of it.

Every space is different though...also...is this a passive or active intake set up? Just ask Joeshmoe how the 'quality' thing works with me .

 

[Guest]

I use inline, blower, and duct booster fans. Those "home depot" fans which are duct boosters are not meant to vent a room. They are meant to boost the air speed inside long ducting. My exhaust ducting which is 6" is about 25 feet in length and there is a bend in it. I placed the duct booster fan about 1 foot after the bend and saw a difference. They aren't crap unless you don't use them the way they were designed. But what someone said you get what you pay for. An inline fan is necessary if you plan on using a carbon scrubber.

 

[Guest]

Well as the plan is now i am going to use two 6 inch 440cfm vortex for the in and out for 5kw of hps bloom. I will only be running that at bloom and at night to cut temps down, right now its 2kw mh and cooled great now . My portable ac is blowing air out at about 500cfm, so i figure all i would need for air intake is a small 200 cfm fan as the room has back preasure as it is. I plan on NOT using a carbon scrubber but well see how that goes as i have one of these. I plan on putting it in a box, and running the vented air through there to be 03'd

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[Guest]

I run 4800 watts, no AC, just lots of air, I run at night, either pay for the AC up front and the electricity to run it or fans with no refrigerant/compressor that can run many more years with less worry. Using an AC in an open system lights on is like trying to cool an oven.

No scrubber is great as no flow loss through the carbon.

Anyway...happy growing .

 

[george j warner]

1) the top fan is a proper grow fan with the power to shift massive ammounts of air .... the way all good grow fans should be ... THEY ARE NOT SILENT BUT CAN BE MUFFLED .. or just get a bigger one than you need and run it though a fan speed controller at 30%

2) the middle looks like a crappy computer fan ... this hasnt got the power you need to bring in air into a noram size grow room ... a cloning area fine but clones dont need that much air ... this is more likely to be used as a movement fan ... just a breeze over the plants (strenghtens the stalks, and moves CO2 around the space)

3) the bottom fan is a in duct fan meant to be used if you have lets say 10/20m of ducting from the main fan (fan 1) this fan just keeps it moving so the air flow doesnt become slower... like on a bike its rolls but from time to time you got to peddal

hope this helps

 

[clowntown]

Neptune's got it.

Vortex is the way to go IMO.

Is noise going to be a concern for you? Are you sharing walls or near neighboring windows? Air cooling 5kw and exchanging air in a room that size might require a good amount of air (and motor) movement.

 

[Guest]

Neptune's got it.

Vortex is the way to go IMO.

Is noise going to be a concern for you? Are you sharing walls or near neighboring windows? Air cooling 5kw and exchanging air in a room that size might require a good amount of air (and motor) movement.

Well i think (or more hoping lol) the walls are thick for me and my neighbor(i think he's an illegal lol), now my back porch with the ac and the blower sounds like a laundry room. Guna make it harder to pinpoint for others where the noise is coming from soon

 

[rastamonunika]

vaportek optimum 4000,
the way to grow!


good luck and enjoii!

 

[Guest]

vaportek optimum 4000,
the way to grow!

I disagree

Vortex is the way to go IMO.

I use the lower cfm Vortex fans but go Elicent for higher flow needs. I've had to swap out high cfm Vortex fans with Elicent due to noise/vibration/reverberation stuff. The right tool for the right job. Those Italians make great fans.

As for Neptune...the dude knows his shit.