Cpu fan

there ya go... just play with it and see what it likes... also you shouldn't have to worry about smells for a lil while.. I wouldnt sweat it to much till it forces ya to.

yea i just finished coating the inside with white paint but had to take out the actual speakers because they went a few inches into the box. i need something to fill the holes with so u cant see the light through. what would u recommend me using?

Either glue some plywood over the holes, or get some contractor's plastic, the black stuff.. or, actually, I think there's a landscaper's plastic that's white on one side and black on another, but I can't remember where I read about it.

P@ssw0rd said:

be specific in what you want , a cpu fan is the fan specifically used to cool the processor. Just get any comp fan 80mm, 100mm, 120mm are all good sizes. But it would be better to just have the fan pushing out if you only use one. From my experience Passive intake works much better then passive exhaust. It goes back to the positive pressure thing again, Better to have all your air escaping from one spot if you ask me.

P@ssw0rd

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Yep! Use the fans to pull the (hot) air out, make intakes large enough that the fans don't have to work too hard.

im confused about how to make an air intake. im planning on getting 1 computer fan and putting it on the back as an exhaust for the hot air. what do u mean by intake? and could i put one on the back of the speaker so its not visible? the fan is going to be on the back also. im trying to make it completely light proof so if someone walks in my room they wont be able to see anything different from a normal speaker.

well you just need a hole for intake... cept without a fan in it... maybe foam

here is a picture i made to help explain it. is the only other thing i need an open hole for air intake? also what could i put in the hole so it can intake air but so its light proof? i dont want it to be visible as anything other than a speaker if someone walks into my room

kronik1023 said:

im confused about how to make an air intake. im planning on getting 1 computer fan and putting it on the back as an exhaust for the hot air. what do u mean by intake? and could i put one on the back of the speaker so its not visible? the fan is going to be on the back also. im trying to make it completely light proof so if someone walks in my room they wont be able to see anything different from a normal speaker.

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Whenever moving any substance through anything, you have an intake and exhaust (or, inlet and outlet), ok? Intake is what pulls or lets the air in, exhaust is the outlet or pulls or lets the air out.
You have computer fans that you want to use to move air through the grow room, right?

You don't want to chew up assloads of electricity, and you want to move as much air as efficiently as possible, so make larger, passive intakes (holes to let air in), and place all fans in such a manner as to have them be what's pulling the air (or pushing it, but to my mind it's pulling it) out via the exhaust (outlet).

Let's say you've got two 4" fans that move, say... 30cfm (that's 30 cubic feet per minute). What would be more efficient? A lot of people think that they need to have one fan on either end to then move 60cfm, but that's not the case. You will only actually be moving the same 30cfm, and could be causing a positive pressure inside the room should one fan be slightly more efficient than another (intake/inlet fan versus exhaust/outlet fan).

If you use both/all fans to pull air out then any intakes will naturally pull fresh air in due to creating negative pressure (a vacuum). Remember, nature abhors a vacuum, and anything that can fill up that space will. In this case that something is air, and you want as much of it flowing through as is necessary to keep humidity and temperatures down. Therefore, place the fans near the top of the room (Laws of Thermodynamics dictate this action), and your intakes near the bottom, as far away as possible from the exhausts.

Does that help?

kronik1023 said:

here is a picture i made to help explain it. is the only other thing i need an open hole for air intake? also what could i put in the hole so it can intake air but so its light proof? i dont want it to be visible as anything other than a speaker if someone walks into my room

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Very cool! Ok, you've got a couple of problems, first and main being that you need to block the light. ANYTHING you use is going to restrict air flow. To that end, I will suggest black foam, NOT closed cell! And make each and EVERY opening in that speak your intake. That way you can use a bit more foam to disguise the light. Consider maybe adding those LED strips around the speakers, assuming you have a pair, to make it look like you're just lighting up the speakers for the cool factor. Maybe you've seen some people's computers where their towers are lit up from inside, and those cars with the colored lights underneath that make them look all floaty, that's what I'm talking about here.

You want the exhaust near the top, believe me. Hot air always rises. I think you'd do better to create a bit of duct-work and put an actual carbon filter over the exhaust, I don't expect a dryer sheet to do much (they require heat and to be rubbed to activate the scent particles).

yes it helps me a ton thanks seamaiden. are u saying i should have 2 fans as the exhaust? and if so would i still need an open hole for intake since the air is going to need a place to go in because of the negative pressure

EXACTLY! That's what P@ssword was trying to say, too. Allow more for intake since you're doing it the way you've pictured, double the diameter of each fan would be my best suggestion. It's a lot like how water is moved through non-pressurized filters.

ok could i just get a thin material or maybe mesh and put active carbon in it? i was considering using a mesh pouch and putting the active carbon in it then stapleing the bag closed and putting it by the fan. if this will work would it be more effective infront of or behind the fan?

so this is what i need to do and get black foam and put it in all the holes in the front for air intake.will the foam completely block out the light?

almost you need the passive intakes at the bottom
remember twice the size of the fans

Crash, I think he would be able to use the speaker cone openings as intakes.

I don't know if the foam will completely block out the light, you could also create baffles that would really help (think of how a darkroom is set-up, many of them have a couple of passageways that u-turn on each other), but space constraints are a problem for you. I mean, that speaker box is only so big, right?

Panhead created a thread where he showed how he made an effective, inexpensive carbon filter from scratch. I would put the filter in front of the fans, make them push air through it, unless someone like panhead says otherwise is better.

Here you go, straight from panhead's fingers.
https://www.rollitup.org/grow-room-design-setup/63004-my-3-carbon-filter.html

i no i was going to put foam in the front holes where the speakers went but them i would have a problem with the light being seen from the front so im going to but a big hole in the back and put black open cell foam over it so it still sucks in air but cover up the light a little bit so its not as visible

i cant do the idea of making the holes where the speakers were as the intake holes so im going to cut a square out of the back thats twice the size as the fans and staple a half or 1 inch sheet of black open cell foam over the hole so it blocks most of the light but still allows air flow. any advise or suggestions?

here check mine out,

yea thats what i was going to do, make a little pouch and fill it with active carbon and put it over the fan so it blows the air through the carbon filter. how long do those filters last before u can smell the chronic

their is nothing cheaper buy 10 you can stack these on top of each other just stack a few Newegg.com - MASSCOOL FD08025S1M4 80mm Case Fan - Case Fans

kronik1023 said:

would u recommend cpu fans or is there something cheaper or better for a small area like mine

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