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The ultimate beginner's guide to PC FANS

ScrubNinja

Grow like nobody is watching
Veteran
Yeah don't trust any website except Delta's in my opinion (they have a great one to sort through specs). Also I noticed that they make revision models and blah blah blah. Make sure you are comparing exact model numbers because my 92mm delta is listed as 1 amp a lot of places, but it's 1.5a.

You don't even wanna hear the variations I found online for my Thermaltakes. Shit is crazy out there. Even the specs on the back of the box were different to the amps on the fan's sticker. :crazy:
 

maryjohn

Active member
Veteran
I just checked the specs from delta, and those are wrong too. I'm going by the sticker on the fan.

just found a source for a converter like yours, but it doesn't have the amps.

and I just ordered a 6 amp power supply. price was right, and I will get two if need be, but I am thinking the other fan will go to a friend.
 

maryjohn

Active member
Veteran
if you click on the image on that site you can see plain as day 3.24a.

must be a mix up at the delta level.
 

ScrubNinja

Grow like nobody is watching
Veteran
Ok I am really getting confused here.

Please, bare with me, I am trying to work this out and I still have no idea what fan you are using as you haven't actually said after the initial amps mixup. Can you just tell me the model number on the sticker of the fan in your posession.

But yes, I would trust the sticker ultimately.
 

maryjohn

Active member
Veteran
the sticker says model afb1212ghe

however, I did buy it from the exact website you posted, and the exact listing, which clearly lists amps below 2.5, not 3.24.

Oh well I ordered a 5 amp digital power supply, for all my experimental needs. These fans are probably not a great solution due to electrical needs.
 

ScrubNinja

Grow like nobody is watching
Veteran
Ok bro, well I'll just leave it with you. Looks like you have a grip on things. When you say "due to electrical needs" do you mean the hassle sorting out the power supply? If so I think it's just how you're approaching it. Always KISS. This has turned into a whole saga when it should be a 15 - 20 minute job.

A PSU, a fan controller, end of story. Or a PSU, snip some wires and establish which speed to run at, job done in 20 minutes, and an hour or two spent studying the lab supply link so you understand what's going on.

But regardless, I hope I helped some. Good luck and let us know what you think of them, please! I am interested in getting one myself.
 

maryjohn

Active member
Veteran
just heard the explanation: starting amps is listed on the fan @ 3.24a. the sustained ampage is 2.45a.

they said it might kill an adapter rated 3amps "eventually".

question: if I get one with a fuse, am I just blowing fuses or the actual unit? I am thinking of my 5 amp supply running 2 in my newer, bigger rubbermaid. it would actually never run at full speed.
 

ScrubNinja

Grow like nobody is watching
Veteran
Damn, mj. You are really asking the curly questions, lol. When you say get "one", I'm not sure which one you mean exactly. And I couldn't help anyway, because I don't remember ever seeing a fuse in a power adaptor or PSU. Does it say overload protected? Short circuit protection? Even though I can't help, I can help you get better info and basically saying "one" is like if I came to the organics forum and asked you if my tea is ready without telling you the ingredients, if it's been aerated, etc etc. No electrician will help you without all the numbers, most likely, they're important as I'm finding out now.

I have learnt that a good PSU (or my 3amp adjustable) is overload protected, and a cheap one is not. So in the event of an electrical mishap, the good PSU shuts down safely - the cheap PSU potentially burns out/explodes/melts.

I am struggling just as much as you are to understand electricity at the moment so my opinion means little, but all the adjustable ones I've seen, apart from my 3A, have "cheap" written all over them. I suspect you won't understand any of it, but regardless, ST8dunwithsociety has really been trying to educate us worthless fools over in the cathode thread. There will be little bits here and there that may help you to get a little further in your understanding, so I hope you have checked it. Wish I could help more.
 

maryjohn

Active member
Veteran
by "one" I meant a fancy new lab power supply rated at 5 amps with a digital readout. got a pretty good deal.

the other "one" I found is this one:

thanks for all your help, this is helping me get it together. And I'm increasing capability from 2 plants to 3.
 

ScrubNinja

Grow like nobody is watching
Veteran
Indeed, thanks for posting it. It almost looks like mine rebadged. I like recommending mine but Dick Smith is an oz only thing, I suspect.

So...dumb question....have you plugged em in yet? I'll be pretty upset if you don't give us a mini review! (especially the volume at lower voltages). I'm pretty close to ordering one. I don't even need it but I figure it's a good tool in my arsenal for the future. I look at a fan as an investment. :D
 

oldone

Member
scrubber thickness advise please

scrubber thickness advise please

Hi Scrub,

Thanks for the very informative post. You have convinced me I can use a single 120mm PC fan for my whole cab ventilation.

I'm cooling 330 watts of PLLs (remote ballasts) in a 15 cu ft cab. Stealth is my number 1 goal. I have tried to pay a lot of attention to ventilation. I'm not venting the lights separately yet.

Air flows from the veg chamber intake --> flower chamber --> drying chamber --> exhaust fan --> scrubber --> past electrical bay --> out of cab.

The main intake is 50 sq in and the inter-chamber vents are 45 sq in. The scrubber will be up to 150 sq in. I can post a sketchup if you want.

I chose this Delta AFB1212HHE fan;
6.1 watts / 3500 rpm / 130 cfm / 11.4 mmH20 / 47 dba / 21 sq in intake
I like the high static pressure for pushing through the scrubber. Its kinda noisy but I'm hoping it will do the job running slower but also having a reserve when I need it. The fan will be raft mounted on foam and the fan chamber will be lined with sound deadening material.

So what thickness of scrubber would you suggest?

Thanks very much,
OO
 

ScrubNinja

Grow like nobody is watching
Veteran
Hi there oldone. Of course I wanna see the sketchup!!! lol.

Listen, I am no expert on the whole flow stuff, even if it looks like that, lol. I'm not actually sure you can do all that with one fan like you've chosen. I mean, that's 330 watts, two cabs, a drying room, and you wanna push through the filter? And then there's even an electrical bay for good measure :D

So taking into account that stealth is very important to you, goal numero uno, I think you're approaching it the wrong way. I mean, I can give you my suggestions if you still want to go ahead like you plan, but have you considered something like a panasonic whisper or an s&p fan? Would seem like a much better choice to me. Anyway let me know what you think and the sketchup would help. Cheers.

Oh but one thing I can say in advance - 0.46 amps of that delta is not gonna cut it.
 

BC Chronic

Paging Dr.Greenthumb
Veteran
Great thread Scrub...
Did you know you can use a 12volt DC dimmer switch for your fans AND be able to speed them up or slow them down?
Tried it and it works great.
 

oldone

Member
Man I'm glad I asked before I ordered the fan(s).

Here is the latest design. Its meant to fit under a stairway (shown without the top or doors). The white area is the electrical bay but I just thew that in there. Not sure about it yet.
album.php

picture.php


Its an E&F in the right side flower chamber. The 2 lower vents are meant to be to be partially blocked off depending on air circulation required in the res chamber.

The original design was for the whisper. I didnt like it because of low static pressure and I cant slow it down. Its on or off only.

I did leave enough room to mount 2 of those deltas...

Thanks again for your time,
OO
 

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