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Thread: higher speed fan solutions?

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    swords's Avatar
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    higher speed fan solutions?

    Well I am happy with my plant shelf but I want to make it cooler, once I put some insulation on it, it should hold in cool air better than just the panda film I have on it now. But I also want a stronger fan, but not a much bigger fan. 4-6" diameter is as big as I want to go and it needs to be flat and mountable like the PC fan from radioshack I currently use which is mounted on my windowframe. I just crack the window (or even not open the window in mid winter) and the cold air gets sucked into the air vent. It's just not powerful enough to drop all 3 shelves as steep as I want during the lights-on period mainly. It worked fine in the old days when i was cooling only one shelf. If I can bring in 2-3 times more flow I'm relatively certain all 3 will be right where I want them.

    So, does anyone know of small square fans or mini box fans I could use other than a radioshack PC fan?

    I bought a housing ventilation "booster fan" from the hardware store and wired it up but that thing makes it sound like a plane is continually flying over the house so I'm not thrilled with that at all.

    I'm looking at this:
    http://cgi.ebay.com/Mini-Box-Fan-AC-...item4ceb9811ba
    and wondering can I wire it to a power cord or maybe even a lighting dimmer switch to adjust the speed, and will it be crazy loud being an air-conditioner fan?

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    Tamer's Avatar
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    http://www.frozencpu.com/cat/l1/g36/Fans.html

    Take your pick. You also might want to look for reviews on specific fans. Surprisingly, noise and CFM differs greatly on seemingly identical fans that have the same RPM.
    Radioshack probably sells cheap junky fans and jacks the price up.
    From your description of what you want the dimensions to be like, your best bet is going to be a computer fan. You might also find the same fans for cheaper elsewhere. This site just has good selection and information like NewEgg.

    Just a few things to keep in mind though:

    Larger fan = quieter/more air
    Faster RPMs = louder/more air

    Quote Originally Posted by swords View Post
    I'm looking at this:
    http://cgi.ebay.com/Mini-Box-Fan-AC-...item4ceb9811ba
    and wondering can I wire it to a power cord or maybe even a lighting dimmer switch to adjust the speed, and will it be crazy loud being an air-conditioner fan?
    That fan is loud. If you want it to be fairly quiet, look for a fan that produces no more than 32dB. I personally do not like noise period so I bought some very low noise fans that operate at 14dB but at the cost of not moving nearly as much air.

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    swords's Avatar
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    My radioshack one has actually lasted for five or six years on the first highland chamber. It's just not powerful enough to service 3 shelves.

    I will look at the link...

    Hmm 217 CFM looks nice. I could blast em with a cyclone season every so often!

    How do you power up one of these fans? The radioshack PC fan you just splice on a normal power plug. On a higher speed setup I would want to have a variable speed since I wouldn't need wind shear all the time.

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    Tamer's Avatar
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    Google would probably be a better resource than me for something like that. I know tons of people that use the fans for things other than their computer. Though, I run my fans straight off of my computer's power supply.

    For a controller, you can get something like this:
    http://www.frozencpu.com/products/62...l=g36c17#blank

    If you want to adjust fan speed. But you may still need something besides that if you intended to splice it and plug it straight into the wall.

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    swords's Avatar
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    Far out we're getting closer!

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    Tamer's Avatar
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    217 CFM :O

    It's going to sound like a Jet Engine. Or possibly a high-powered blow dryer. :P

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    I have a ton of server grade CPU fans laying around. If you want a few I would be more than happy to send them to you for cost of postage. I'll send you pics if you are interested. They are about 3" X 4" if I had to guess.

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    Let's positive thinking! seedjar's Avatar
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    Not sure where to get a particularly quiet fan, but one thing you could do about the noise is to mount it with a vibration dampener. Build a thick gasket out of soft foam and use elastic string or soft vinyl twine to hold the fan to the rack. Otherwise, you could splice the fan into the middle of your duct, and hang it from the ceiling with bungee cords or the like. You can make a decent muffler from a coffee can or the like if the sound is coming from the bearings/rotor and not just a result of vibration.
    ~Joe
    o//~ Livin' like a bug ain't easy / My old clothes don't seem to fit me /
    I got little tiny bug feet / I don't really know what bugs eat /
    Don't want no one steppin' on me / Now I'm sympathizin' with fleas /
    Livin' like a bug ain't easy / Livin' like a bug ain't easy... o//~

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