i was investing on buying pc fan x3 were or how can i get these babys running and are they powewrful enough to handle ducting?

I think the general concensus is don't skim on your air exchange, get an industrial fan that will do the job.
4" or 5". People have tried with pc fans but think about it. Fan has to be on 15 hours (av) per day for 3 months. .... then your next grow ....

4" (100m) can get for £70 ... what do yos say, (whats that joolz knock it out at £65?) ok mate you got yerself a deal £65... 4" .... goto ... uk420store .... top right of screen ... grow shop

PC fans will, in no way at all, cope with ducting and doing any serious air exchange, and as Hir already said, there's also the duty cycle to think about, too. I'd just bite the bullet and get yerself a decent inline fan that's up to the job, and will last you many years.

PC Fans maybe ok for intakes... Infact this is what I use for my intakes on the end of a very small piece of ducting... I also have a large passive intake though..

I would have to agree though, for air extraction they would be no good... ... I use a 100ml inline fan which works great...

I think for all the hassle of getting enough PC fans on there, you may as well go for an inline fan

12cm pc fans are great for air circulation and aiding a passive intake, but thats about it.
I have 3 in my room to stir the air up all wired to a variable voltage power supply from Argos.
Its the kind that will do anything from 3v to 12v so you have buit in speed control too....

Hi I have just started using the pc fan type and i have connected them using connector block to modem power supplys, the type that you plug in to the mains socket.
I have 1 rated at 12 v on a 9v supply for passive intake and another on 7.5 volts supply for air movement.
Both are working a treat.
Don't have a need for extraction yet as only growing under flouros for vegging.
hope this helps.
the power supplys were lying around.
Almost free

I beleive mobile phone chargers can also power em

If you must use 'PC Fans' then at least buy the decent AC versions which have a fair bit more torque. They're still no use for filters other than ones constructed from cooker hood filters though.

The metal ones Maplin sells have a MTBF (mean time between failures) of 20,000 hours @ 50C to 40,000 hours @20C. 20,000 hours = 2 and a quarter years; 40,000 hours = 4 and a half years. I use an 80mm AC fan on the end of my reflector to blow the heat away from the HPS bulb and a 120mm AC fan for a mums/clones box. They work well in those roles.

Guys if you are thinking of useing any pc fan? Use the 80-100ml inside the psu
These are normally heavy duty and will give best long servise! Also the 100ml suposedly does 80 ltr pr sec?

Best Ive ever ad these was in my old veg boxrunning on a 6-12v 300ma adapter ad the adapter set to 12v on 2 x 100ml and after 3 yrs of 20 hrs a day they still worked?
Just ad to use rubber washers to dampen


a mobile phone charger from old fones ye?
new ones rate about 7v dc max now

wisp

I tried to use PC fans with my first grow using enviroltes, more trouble than they are worth but I Still wouldnt listen and invested in 4 x 120mm fans thinking i could save some money. In the long term I spent so so much more ( blown AC adpators, lost weed due to heat issues, replacing fans that broke cos they are shit, buying more fans thinking i nearly had it cooled ok when it was nowhere nr being efficent, and spending money on proper fans ). I finally listened to people and got a small 100mm closet fan worked a treat Now im onto HPS and using a RVK 150mm working wonders with my 400w


edit for missing out half the words dam it im tired yo!