View Full Version : fans for heater core
I'm trying to build my first watercooling rig and I just got a heater core. The cooling area is 21cm X 18.5cm. My question is what should I use for a fan? One 120mm in the center or Two 92mm's or something else?
Thanks
dreadlord79
01-23-02, 10:22 PM
Is the radiator inside the case or outside? If it is in the case, are you going to have it pulling air in or blowing it out?
I haven't decided yet. I'm using a 4Q full tower ATX case (seen here at VH http://www.virtual-hideout.net/reviews/4q_fulltower_atx_case/index.shtml ), like I said before this is my first try so I'd appreciate suggestions on placement, air direction, etc.
thanks
I'd vote for two quiet (albeit lower cfm) 92's. You can get plenty of air and some peace and quiet.;)
yo could always get one of these :)
http://comairrotron.com/dcfans/FalconDC.htm
muddocktor
01-24-02, 12:47 AM
Originally posted by mr_kow
yo could always get one of these :)
http://comairrotron.com/dcfans/FalconDC.htm
Dude, that fan is just outrageous! 300 cfm, he'll need to strap a 2X4 to his butt so that he doen't get sucked up into the fan. I bet you that critter sounds like a tornado moving past you.:eek:
I'm thinking I'll put the radiator in the rear towards the top and have air sucking in the case and put an exhaust fan on the top of the case. Or maybe put the radiator in the front at the bottom with air sucking in and have exhaust's in the rear and top (I need them for my OC'd vid card, unless I get a block for that too). Any suggestions are appreciated.
ButcherUK
01-24-02, 03:48 AM
I use a http://comairrotron.com/dcfans/MajorDC.htm at half-voltage and it's a great fan. Good airflow, nice pressure handling and quiet. Also the flat sides make it a better fit for a core than the round 172s. I'd really strongly reccomend one of these (or the 300cfm variant) over a pair of 92s or a 120 - you'll get much better airflow for the same noise.
In terms of air noise, they're not much worse than a delta and it's a roar of air not a scream of bearings which is a lot less annoying. not bad considering you get about 6 times the airflow of a delta. :)
Thanks for the advice. It looks like a great fan, but $70 is just too high for me.
ButcherUK
01-24-02, 07:48 AM
$70?! I saw them on caseetc for $30. I got mine for £5 ($7.50) from an online surplus store. :)
The Overclocker
01-24-02, 10:36 AM
bigger fans move more air at a lower noise, any questions?
if the fan is too loud run it at 7 or 5 volts
Originally posted by mr_kow
yo could always get one of these :)
http://comairrotron.com/dcfans/FalconDC.htm
OMFG I was so stoked when I saw the maltese fan. It would have fit perfectly on my radiator....
Then I saw the price tag:mad:
Why in the hell would I pay $75-$130 for a fan?!?
I checked ebay already, but the largest comair (or any kind of) fans were 120mm. Anyone know where I can get some of those massive comair fans for cheap? prefferably in the US..
res0r9lm
01-24-02, 02:07 PM
Originally posted by Krusty
OMFG I was so stoked when I saw the maltese fan. It would have fit perfectly on my radiator....
Then I saw the price tag:mad:
Why in the hell would I pay $75-$130 for a fan?!?
I checked ebay already, but the largest comair (or any kind of) fans were 120mm. Anyone know where I can get some of those massive comair fans for cheap? prefferably in the US..
caseect (http://www.caseetc.com/cgi-bin/caseetc/F-400.html)
UserName
01-24-02, 02:12 PM
Use a hoot (http://www.overclockers.com/tips461/index02.asp). Quiet and outragous air flow. Why mess with less?
Patchmaster
01-24-02, 02:25 PM
Anyone know where I can get some of those massive comair fans for cheap? prefferably in the US.. How about this one: Major DC (http://www.mpja.com/product.asp?product=14039+FN)
I know nothing about this merchant; just found it doing a Google search. I have this same fan in a different power connector configuration. It's a great fan. Extremely well built. Moves a LOT of air. It's not quite at the Maltese level but it's close (300cfm vs 235cfm). And this is a fantastic price for these things. I may order a couple more just for the hell of it.
Oh, be aware these things pull a lot of current. If you have a less than robust power supply you might run into trouble. Also, if you intend to sleep anywhere within about 100 feet of this thing, you probably want to think about some way to turn it down a bit at night. I use one of these rheostats (http://bgm.bgmicro.com/prodinfo.asp?sid=058798611111111113421723730&prodid=PWR1044&page=1&cri=rheostat&stype=3). It's a bit clunky, but it does the job nicely
Was in an electronics store today and sitting on a shelf with a whole bunch of fans, I find a Comair Patriot. The fan has three wires, red, black, and blue/white striped. Anyone know what the blue/white wire is for? I think it's a tach output or a fan performance sensor (whats the difference anyway) but I thought those wires were yellow. Can anyone clear this up?
You need this baby:
http://comairrotron.com/dcfans/CaravelDC.htm
550 CFM!
49dBA!
Probably hella expensive.
Yodums
Originally posted by Patchmaster
How about this one: Major DC (http://www.mpja.com/product.asp?product=14039+FN)
OMG! That is an awesome deal! caseetc.com is selling that thing for like 40 bucks and this site has em for 12.50! I went ahead and bought 2 just for the hell of it.
Patchmaster
01-24-02, 08:11 PM
OMG! That is an awesome deal! caseetc.com is selling that thing for like 40 bucks and this site has em for 12.50! I went ahead and bought 2 just for the hell of it. After I posted that link I went back and ordered a couple myself. I think I'm going to use one to ventilate my garage. I ordered a couple small power supplies also so I can use the fans for stuff other than the computer if I want.
For those who might have a need, they also had 2m CAT 5 patch cords for $0.50. Hopefully you won't mind bright yellow. I grabbed ten of those. I don't actually have a need for them, but now I know I'll never run out of short CAT 5 cords.
ButcherUK
01-24-02, 09:35 PM
Blue wire ais a fan perf sensor, dunno what the signal is - they don't work with mobo headers.
patchmaster and krusty - is the reseller reliable?
did you receive the fans thatt you ordered?
just makin sure before i order a few :)
f155mph
01-24-02, 10:31 PM
Those of you who are getting those 230cfm fan, you might want to buy some finger guard too. Comair uses metal blades not plactic. So it can probably take your fingers off.:D
res0r9lm
01-24-02, 10:38 PM
anybody needing grill for 172mm fan they have them at caseect
Originally posted by f155mph
Those of you who are getting those 230cfm fan, you might want to buy some finger guard too. Comair uses metal blades not plactic. So it can probably take your fingers off.:D
I thought they were supposed to be all metal blades too. I think the site I bought mine off of mixed up a few words:
"NO. OF BLADES: 7 Metal frame, Plastic blades"
Maybe they mant metal blades, plastic frame.:confused:
EDIT: ooh, just did a quick calculation. one fan draws 27 Watts of juice at 12V! I'm thinking I'll either need a new PSU or find a way to combine my 300w and 320w psus. I'll be running one of those fans, 2x120mm fans, and 2x92mm fans. Not to mention my pump...
res0r9lm
01-24-02, 11:57 PM
Originally posted by Krusty
I thought they were supposed to be all metal blades too. I think the site I bought mine off of mixed up a few words:
"NO. OF BLADES: 7 Metal frame, Plastic blades"
Maybe they mant metal blades, plastic frame.:confused:
EDIT: ooh, just did a quick calculation. one fan draws 27 Watts of juice at 12V! I'm thinking I'll either need a new PSU or find a way to combine my 300w and 320w psus. I'll be running one of those fans, 2x120mm fans, and 2x92mm fans. Not to mention my pump...
here is an guide on combining 2 or more psu
click here (http://www.procooling.com/articles/html/linking_multiple_psu_s_as_one_.shtml)
Originally posted by res0r9lm
here is an guide on combining 2 or more psu
click here (http://www.procooling.com/articles/html/linking_multiple_psu_s_as_one_.shtml)
That article didn't exactly have what I needed in it. the only thing I found that I would need to know is that the +5v line needs a load at startup. Unfortunately, I still don't know how I could get both psus to turn on when I hit the power button on my computer. After all, only one psu is plugged into the mb.
Perhaps if I splice the mb wires for teh second psu into the mb wires for the first...
res0r9lm
01-25-02, 12:38 AM
yea green wire is power might also have to splice p.g. signal wire and also have to splice ground of course
Patchmaster
01-25-02, 12:54 AM
Maybe they mant metal blades, plastic frame. No, they have it right. The frame is a painted metal. I'd guess aluminum. The blades are a hard plastic material, considerably thicker than the more normal computer fans. Despite the fact they're plastic, these blades will most assuredly cause serious damage to any body parts that stray into their path. A fan guard is definitely a good idea. Allied Electronics (http://www.alliedelec.com/catalog/pf.asp?FN=83.pdf) has one made specifically for this fan. Some construction cloth would probably work and be a lot cheaper.
ooh, just did a quick calculation. one fan draws 27 Watts of juice at 12V! I'm thinking I'll either need a new PSU or find a way to combine my 300w and 320w psus. I'll be running one of those fans, 2x120mm fans, and 2x92mm fans. Not to mention my pump... You probably won't need all those fans if you add this big one, but you might not have any trouble. I was able to run the MajorDC, 2 80mm fans and 2 60mm fans, along with two Celeron CPUs, a CD-ROM and a CD-RW, all from a 300W PS. I've since upgraded to a 450W PS, but the 300W did fine with the fans.
I have the Patriot and I'm wondering how to use it to cool my heater core. Should I attach it directly to the core or should I mount the fan like 1" - 1.5" away from the core? I'll most likely mount the radiator on the rear of the case and put the fan inside sucking air in through the heater core. Also, how should I attach the heater core to the case?
thanks
res0r9lm
01-25-02, 01:27 AM
mount atleast 1" away. sucking I'm using industrial strength velcro onmy rad
h2sammo
07-25-02, 07:57 AM
quatto,
in what electronics store did you see the patriot?
and for how much? how strong was the fan? size, etc
thx
I found it at Gateway Electronics in San Diego, I'll post the specs when I find the fan again.
Owenator
07-25-02, 08:43 PM
From the rest of the thread is sounds like you've made up your mind but might I suggest four 80mm fans? I use four to get the equivalent of a 160mm square fan on my rad. I have the fans mounted about two inches off the rad sucking air through. The fans I bought are panaflo L series 24cfm at 21 dBA I believe. I got them from www.allelectronics.com for $4.50 each. I have a total of eight in my case 4 intake 4 exhaust. Here's a pic.
O
Owenator
07-25-02, 08:55 PM
Here's a close up:
O
I'm building a shroud out of lexan so i can mount a 120 in front and 120 in the rear of the heatercore. I'm trying to keep the noise down and those comair's are damn loud
wildfrogman
07-26-02, 02:29 AM
Yep the comair rotron 235 cfm fans are a bit loud but not as bad as say a 80cfm 80mm fan or 40+cfm 60mm fans. Have you tried 7 volt mod on the fans......i did that the first day and am working on a switch ~off~7~12 volt so i can turn on off slow down etc
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