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question about a certain type of fan, DIY scrubbers.
Posted 15 May 2012 - 07:08 PM
some fans are centrifugal and are blowers, etc. i was at wal-mart and they have mini 4inch high velocity fans for $7. why can't you just throw that little fan in a tube and attach a DIY scrubber?
the fan is incredibly fast for its size, way more powerful than any pc fan ive ever seen. i'm talkin about small areas, like 4 cubic feet. i've seen very few homemade scrubbers on here with pictures of their fans as well. and certainly a pc fan is not the proper fan.
so, does anyone have experience with these mini fans? they are on amazon as well for a little bit more money.
any pictures with homemade scrubbers and fans attached in micro boxes? i'm not interested in mini pc fan setups really, those don't interest me. also, does the coffee can scrubber work any different than the pencil cup scrubber? the coffee can is not mesh screen all the way thru like the pencil cup is, so i imagine airflow and carbon coverage is different.
Posted 16 May 2012 - 01:21 AM
Posted 16 May 2012 - 03:44 AM
I think the 'catch on fire temp' for nylon is much higher than the surface of a cfl could produce.
Posted 21 May 2012 - 12:32 AM
One more question.. I don't know much about electricity, but I am under the assumption that as long as I do not exceed 15 amps, I can connect as many power strips to each other as I want, right?
For instance, two strips in the box with light bulbs+socket adapters both plugged into another strip with fans all plugged in another strip to the wall. Is this bad? Six 26 watt lights plus four 0.35amp fans adds up to about nothing so am I in the clear?
edit: all the power strips state 15 amp maximum
Edited by johnneyb420, 21 May 2012 - 12:35 AM.
Posted 21 May 2012 - 08:50 PM
Posted 21 May 2012 - 11:30 PM
You could always buy a 'kill-a-watt' and plug into it to see exactly how much wattage you're running though it. I bought one for that very purpose. They're about 25$ and they're really handy to have to check other stuff around the home. You can figure all this out with math and stuff...but they're a pretty cool tool to have anyways
*do not plug 1000w ballast into kill-a-watt...they tend to melt at around that wattage, still works though lol
** not an electrician!
Posted 22 May 2012 - 07:04 PM
I was having trouble keeping temperatures down. It's 17 inches high, 16 inches across, and 23 inches deep, about the size of three small little pc setups. I have 6x26 watt CFLs, three 4in PMX high velocity fans for circulation, one PMX 4in fan connected to the pencil cup scrubber, and 2 120mm pc fans for intake, one 80cfm and one 40cfm. I'm thinking 88 is the best it can get in such a small spot? When it's really hot it can go up to 92.
Or the problem is airflow thru the scrubber and/or light traps? I really don't know.
Edit: the scrubber is connected to the exhaust, and the two intake fans are NOT stacked, they are side by side.
The room I am testing it in is also on the top floor, in the upper 70s. That could also be the problem. Perhaps when it is moved to his house it will be in a colder location.
Edited by johnneyb420, 22 May 2012 - 07:22 PM.
Posted 22 May 2012 - 09:18 PM
i have a feeling if i detach the pencil cups and drill holes in the bottom, it will be minimal difference so i haven't done that, not worth the trouble. i think the problem is the exhaust fan, it is one of the round ones hanging. what can i do to get air flowing nicely?
the exhaust barely has airflow, but there is some, it is very warm. the intakes work great.
edit: I left the temp. meter out in the room, and it says 79 so perhaps it is normal to be ten above or so in the box. still doesnt feel that warm, the ac would kick on and it hasn't.
now it says 77 in the room, which is what i thought. so temps are rising about 15 degrees on the inside.
Edited by johnneyb420, 22 May 2012 - 09:43 PM.
Posted 22 May 2012 - 09:26 PM
edit: I had to modify the inside of my fan to make it work. I believe I took it apart, and cut off this plastic wall on the inside. I also sealed off the other intake on it so the only air going through that fan is coming from the carbon filter.
-yea If you have one of those circular yellow shop fans, and it is trying to pull air in from both sides....you might need to modify the inside slightly to make it more efficient. There should be a plastic rib that separates the fan into two sides. I removed it, and sealed up all the seals with hot glue.
Edited by RongBip, 22 May 2012 - 09:34 PM.
Posted 22 May 2012 - 09:40 PM
based on my available size in there, what can i do or buy and still have enough room for whatever he does with it.
i would consider buying a real 4in hydro fan, yet i hear those are just too loud and probably overkill for something this size.
Posted 22 May 2012 - 11:42 PM
Posted 23 May 2012 - 01:11 AM
i really would like to get this down to an acceptable temperature, someone here has got to have a solid answer with maybe some math involved or something, what can i do? my light traps are simply boxes placed on the outside behind the fans, about 3 inches deep, expelling at the bottom. so, the air shoots out of the fan and hits the cardboard wall and has to travel down a few inches. on the intake, the air is sucked in from the bottom and travels up basically an inch, which is so minimal that is why my intakes work great.
my problem is the exhaust and that goddamn pencil cup filter which no one has been able to show their fans connected to it with positive results. without the filter the box vents like a champ and will get down to room temperature basically, so my exhaust plus that stupid cup filter is the problem.
any ideas guys?
Posted 23 May 2012 - 12:24 PM
Posted 23 May 2012 - 03:50 PM
how precise does the 2x intake to exhaust have to be? because i have roughly twice the intake. it is very close, with two 120mm fans as intake and one 6in diameteter exhaust.
maybe i should make the coffee filter and see if airflow is any better? i can almost feel no airflow whatsoever, the filter severely restricts everything. is your filter as small as mine in the photo above?
also, what if i were to add a small 80mm intake above the other two intakes on the side? i didn't do any pi x r squared crap but i think that would help significantly, right? sucks every time i need to make an adjustment, this thing gets completely disassembled.
Edited by johnneyb420, 23 May 2012 - 03:55 PM.
Posted 23 May 2012 - 05:48 PM
Posted 23 May 2012 - 06:54 PM
Posted 24 May 2012 - 01:25 AM
i dont know if i should add the 80mm intake or what, or just leave it how it is and accept 95 degrees on days that are hot as hell.
maybe i should try the coffee filter scrubber, because this fan cant pull shit thru the pencil cup.
Posted 25 May 2012 - 02:41 AM
Posted 25 May 2012 - 02:42 AM
Try running just the exhaust and use a lighter to see if the intake sucks more air with the fans off. You might be pushing more air in then the exhaust can remove. That's how I roll. Just and exhaust fan and the air gets sucked into my intake hole.
From the many journals I have read the passive intake is the best thing to use
Posted 25 May 2012 - 03:47 PM
the temperature is hotter without the exhausts on, so they are helping. i might just leave it as it is, it gets to 88-90, but the more i read, those are acceptable temperatures.
people have had positive results with high heat, i'm guessing it should do fine in 90 degrees, it is what it is.
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