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Thanks for the info, I just dug my old PSU out of the closet and tested it out today. Everything is working great.

Whiteflour, thanks for the response! I have an old PC PSU I can use and a switch. Just not sure how to wire the switch into it? I think I may go this route because I am concerned 74cfm may not be enough and was looking at getting some more powerful fans.

Would I be better off just using an old PC PSU to power the fans? How would I need to wire that?

What would you use to power those things?

Hello I'm new here and would just like to thank everyone for all of the information! So I have a question about my setup. I have 2 small cabs ~ 2'x2'x4' each. I was looking at venting them each with 2 12v .4 amp 120mm 75CFM PC case fans, 1 for intake 1 for exhaust w/ DYI carbon filter. If I am...

How loud are fans like this? http://cgi.ebay.com/6-inch-INLINE-DUCT-FAN-exhaust-BOOSTER-blower-cool-air-/390127340450?cmd=ViewItem&pt=LH_DefaultDomain_0&hash=item5ad566cba2 Anyone have an idea in decibels? Would it be a better choice than 120mm PC case fans? I'm just worried it will be too loud.

any other thoughts?

Thanks, I was under the impression that wiring in parallel increased the demand on the power source because each component in the series drew the full 12v. Where as in series the first component draws 12v and that voltage drops based on the consumption of that component so the next component in...

I have a question along the same vein as gumball's. If I am using 4 120mm PC fans (2 instake, 2 exhaust) and am powering them via a 12v DC converter should they be wired in series or parallel or a combination with 2 in series on each of 2 parallel circuits? I just want to make sure I don't start...

Thanks for the response. Its a 2'x2'x4' room with a 74CFM intake fan and a 74CFM exhaust fan pulling through a carbon filter as seen in the link from my first post: https://www.rollitup.org/do-yourself/...rt-carbon.html I have 2 such rooms both with their own intake fan, exhaust fan and...

I'm looking at exhausting 2 rooms individually, each are approx 2'x2'x4' Would a couple of DIY filters like found here: https://www.rollitup.org/do-yourself/101248-best-diy-ez-walmart-carbon.html with a 120mm 74cfm computer fan for exhaust work? 1 fan for intake and 1 for exhaust + filter on...