What 120mm fans for hood?

[Ereefic]

I'm looking to get 4-120mm fans for a canopy, but not sure what's quiet and what's not. I'm looking from something quieter than Radio Shack fans with similar airflow. Any recommendations? Looking for something cheaper than the RS fans as well.

[AZDesertRat]

Vantec Stealth.
http://www.vantecusa.com/product-cooling.html#

[James77]

I second them- I have 3 1/2 inch ones, extremely quiet

[want2reef]

I use panaflo.

Very quiet. :)

[Ereefic]

I think i'm going to get the stealth fans. I assume a regular 12v 'wall wart' will be fine with these? What mV will I need to run all 4 fans?

[AZDesertRat]

I use a variable voltage AC/DC adapter from Harbor Freight Tools that is rated at 500mA. Its nice as I can vary the speed of the fans to fit the room and tank temperatures. I am running them at 9v DC right now and in the winter I slow them down to 7.5 or even 6v when I don't need as much evaporative cooling. Wal Mart sells a similar AC/DC variable voltage adapter for less than $10.

[Ereefic]

I have a adjustable voltage adapter as well, with a switch for 100mA or 300mA. Will 300mA be enough to run 4 of the stealth fans? Also, how do I wire these up as there are 3 wires coming from the fan?

[AZDesertRat]

I think each 120mm fan draws 80 mA so 300 may not be enough for 4 fans but its worth a try. As for wiring only use the black and red wires the yellow is not needed, just tape it off.

[lastin1]

<a href=showthread.php?s=&postid=7743086#post7743086 target=_blank>Originally posted</a> by Ereefic
I have a adjustable voltage adapter as well, with a switch for 100mA or 300mA. Will 300mA be enough to run 4 of the stealth fans? Also, how do I wire these up as there are 3 wires coming from the fan?

When you reduce the voltage, you will also reduce the current draw. Just wire it up and monitor the adapter for overheating. It should be warm to the touch. If you can't keep your hands on it, then it's overheating.

[Ereefic]

Thanks guys. I think i'm going to wire up 2 together and run them when the lights are on. Wire the other 2 together and hook them up to my temp. controller.

[BMitch]

<a href=showthread.php?s=&postid=7730522#post7730522 target=_blank>Originally posted</a> by AZDesertRat
I use a variable voltage AC/DC adapter from Harbor Freight Tools that is rated at 500mA. Its nice as I can vary the speed of the fans to fit the room and tank temperatures. I am running them at 9v DC right now and in the winter I slow them down to 7.5 or even 6v when I don't need as much evaporative cooling. Wal Mart sells a similar AC/DC variable voltage adapter for less than $10.

Do you have a link to either of these products?

[AZDesertRat]

Here is the one from Harbor Freight:

http://www.harborfreightusa.com/usa/itemdisplay/displayItem.do?itemid=46977&CategoryName=&SubCategoryName=

[Ti]

i just noticed those adapters come wih wattage ratings.

[crumbletop]

This is the adapter I got from fry's electronics to run my vantec stealths.

http://www.outpost.com/product/4011642

Jack

[jackforester]

Wow, 1200mA for $9.99! That'll re-charge my son's model airplane faster too.

[crumbletop]

They also have pretty reasonable prices on the fans.

http://shop4.outpost.com/category/Outpost/Electronic+Components/Computer+Components/PC+Cooling+&+Fans/Case+Fans?accipterAreaString=

Jack

[auSS/Tin]

Our LFS just started to carry these bad boys.

http://www.3dcool.com/product_info.php?cPath=66_73_81&products_id=1609

11db, 120mm. You have to touch it to know if it is spinning or not. I was totally blown away. LOL, no pun intended.

Bill

[badpacket]

Cool, but pretty low CFM that it is putting out. I would imagine you could take most 120mm fans, put a resistor in to undervolt them to 7-8v, spin them at ~1200rpm and get a quiet fan with weaker output.

[Ti]

what is more important, high cfm or high rpm?

[AZDesertRat]

Higher RPM usually means more noise, thats why 120mm fans are sometimes quieter than 80mm fans, they turn slower. Higer CFM means more noise too as it either means higher RPM or more pitch to the blades to move more air. At $12 the Stealth is a pretty good tradeoff, pretty quiet and moves a fair amount of air. At 9v they are probably somewhere around 1200 RPM and you can;t even hear them.

[MDboyz]

I always buy my fans from www.svc.com. They have pretty cheap price tho.

[badpacket]

MDboys,

Thanks for the link, found this:
http://svcompucycle.stores.yahoo.net/sy-fan-sff21d.html

And, they've got hose adapters on sale this month:
http://svcompucycle.stores.yahoo.net/july2006.html

And even better, they have baby reactors....
http://svcompucycle.stores.yahoo.net/ddc3r.html

OK, guess its time to get off the internet.