has anyone seen this kind of USB speed control fan comes in 200 mm

I haven't, but there are other options. Currently I use this https://www.amazon.com/Easycargo-Controller-Playstation-Raspberry-Ventilation/dp/B07JMQ6KND/ and this https://www.amazon.com/CRJ-Voltage-Step-Up-Sleeved-Adapter/dp/B081K8LBH3 on some 140mm fans, and I found these https://www.amazon.com/NOYITO-Stepless-Controller-Regulator-Switch/dp/B07PMNLMMH/ that give even greater control. Buy the fans use want, use the adapters you need, and you're good to go. The Noctua NF-A20 FLX only requires .08a max, so you could even add additional y cables and fans for further expansion.
 
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mhenley said:
I haven't, but there are other options. Currently I use this https://www.amazon.com/Easycargo-Controller-Playstation-Raspberry-Ventilation/dp/B07JMQ6KND/ and this https://www.amazon.com/CRJ-Voltage-Step-Up-Sleeved-Adapter/dp/B081K8LBH3 on some 140mm fans, and I found these https://www.amazon.com/NOYITO-Stepless-Controller-Regulator-Switch/dp/B07PMNLMMH/ that give even greater control. Buy the fans use want, use the adapters you need, and you're good to go. The Noctua NF-A20 FLX only requires .08a max, so you could even add additional y cables and fans for further expansion.
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Those look better than the usb -> fan connectors I use for my networking stuff.

Be careful with a 200mm fan, sometimes the usb power source doesn't have enough power to start a fan, so you may have to give it a manual push, should be good to go once its in rotation.
 
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Yeah I've used some of those cables/controllers to add fans to appliances that needed more ventilation, like routers/modems, or in areas like AV cabinets. You just have to get fans that are relatively low power, but have decent performance at those lower RPMs.
 
mhenley said:
I haven't, but there are other options. Currently I use this https://www.amazon.com/Easycargo-Controller-Playstation-Raspberry-Ventilation/dp/B07JMQ6KND/ and this https://www.amazon.com/CRJ-Voltage-Step-Up-Sleeved-Adapter/dp/B081K8LBH3 on some 140mm fans, and I found these https://www.amazon.com/NOYITO-Stepless-Controller-Regulator-Switch/dp/B07PMNLMMH/ that give even greater control. Buy the fans use want, use the adapters you need, and you're good to go. The Noctua NF-A20 FLX only requires .08a max, so you could even add additional y cables and fans for further expansion.
Click to expand...
have you ever post some photo of the above setup? I actually look into the Noctua 200mm before I post the above. They are missing the front metal plate, but a bigger problem is, there is no cable reasonably long. So I wonder for your above setup, the cable is long enough?

Just now, "TheSlySYL" said the USB power is not enough to power 200mm, I never thought of that, if so, I am stuck w/ the above 12 cm fan
 
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It really depends on the particular fan. I power quite a few 140mm fans via usb, but I have one in particular (an older corsair fan with blue LEDs) that doesn't get enough juice from a usb 2.0 connector to restart itself. I just give it a nudge and its good again until the next power outage.

It's also not cooling anything that even slightly needs active cooling, (a node in my Mesh network) but I feel better having it there.
 
well, in the old days, people buy open air audio rack, and dust sucks up all over the inside and on the MDF boards. But now w/ these fans, they can be kept in an air tight cabinet, that way, no more dust.
 
Happy Hopping said:
have you ever post some photo of the above setup? I actually look into the Noctua 200mm before I post the above. They are missing the front metal plate, but a bigger problem is, there is no cable reasonably long. So I wonder for your above setup, the cable is long enough?

Just now, "TheSlySYL" said the USB power is not enough to power 200mm, I never thought of that, if so, I am stuck w/ the above 12 cm fan
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He said sometimes. Unfortunately companies don't always list the initial starting voltage/amperage required, but thankfully with many return policies at different vendors the risk is low on being stuck with something. Also, if you use a USB block and not the port on a pc, you run into fewer problems with startup because there is plenty of juice available. Also, I'm sorry. I don't have photos of the setup I mentioned. It's located behind my home theater equipment and cable routed in quite tight.
 
@ mhenley:

When you setup your unit, does the manual tell you how many in. of space you must leave at the outflow of the fan? for e.g., say you need to put a pair of speaker on the left / right side of your cabinet, does your manusl say how many in. is require to get proper air flow
 
Unfortunately, not really. Some manufacturers say 6" above and 2" on the side, others are 8" on both, some don't list anything at all but we all know they need to breathe. None of these measurements are spec, just recommendations. I generally follow "more is better" but if I question it then I add a little extra for peace of mind. I'll happily throw what my wife calls "stupid money" to save my investments.
 
Not quite 200mm (about 120x240 mm), but this is the company that originally designed those fans (probably same oem, tbh): https://a.co/d/6LGLCeT

If you check their website, they may have 200 mm fans... but I doubt it.
 
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Happy Hopping said:
https://www.amazon.com/SCCCF-Cabinet-Cooling-Control-Cabinets/dp/B09VD75DHX/ref=sr_1_3?crid=16O80R8XHNNPR&keywords=scccf+usb+cabinet+quiet+fan&qid=1694767210&sprefix=,aps,109&sr=8-3&th=1

this product is very good. But has anyone seen some other brand that has the 200 mm silent version of the same thing?
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Noctua has a 200mm fan. And they offer it in a 5v version, with a USB adapter cable. So it can be properly powered by a USB port and get full speed, compared to using a typical 12v computer fan, with a USB adapter.

https://www.amazon.com/Noctua-NF-A20-5V-PWM-200x30mm/dp/B07F1DKVWB/ref=sr_1_1_sspa?crid=8YX1CKHWVR6D&keywords=noctua+200mm+fan+5v&qid=1697061763&sprefix=noctua+200mm+fan+5v,aps,145&sr=8-1-spons&sp_csd=d2lkZ2V0TmFtZT1zcF9hdGY&psc=1

However, if you don't need full speed and want a quiet fan: using a 12v fan instead, will net you a low speed/quiet fan. I have a 120mm 12v fan with a USB adapter, stuck to the back of my Asus router, with some dual sided tape. powered off one of the two USB ports built into the router.
 
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I look into the Noctua option, in the end, it doesn't have that metal face mount, and I have to order the other parts to make it work.

I really like the link that Nobu above given, it comes w/ everything. So now, a new quick question arise:

You notice in the 1st link I provide or the link that Nobu provided, fans are on 1 side. It shows some cool air coming in, and hot air coming out. My question, why does both link shows the fans at the left or right? Can you have say, the cool air fan on the rear, and say a few more cool air fan on the rear, and the hot air fan at the rear as well? Meaning, I don't want to use the right side of the cabinet, just the rear, and say 4 fan total, and the rear, 2 to 4 fan out, whatever is needed? In other words, is there any reason we can't have all these fans at the rear? because for cabling

a) all you need is a small hole.
b) you can even bring the UPS inside the cabinet, and have 1 or 2 cables branch back out at the bottom, along w/ cable to the speaker. Those few small holes shouldn't affect a hand full of fans at the rear


P.S. I assume that photo is suggesting hot air rises to the top, as such, they have to get the hot air exhaust fan at the top, venting out
 
Happy Hopping said:
I look into the Noctua option, in the end, it doesn't have that metal face mount, and I have to order the other parts to make it work.

I really like the link that Nobu above given, it comes w/ everything. So now, a new quick question arise:

You notice in the 1st link I provide or the link that Nobu provided, fans are on 1 side. It shows some cool air coming in, and hot air coming out. My question, why does both link shows the fans at the left or right? Can you have say, the cool air fan on the rear, and say a few more cool air fan on the rear, and the hot air fan at the rear as well? Meaning, I don't want to use the right side of the cabinet, just the rear, and say 4 fan total, and the rear, 2 to 4 fan out, whatever is needed? In other words, is there any reason we can't have all these fans at the rear? because for cabling

a) all you need is a small hole.
b) you can even bring the UPS inside the cabinet, and have 1 or 2 cables branch back out at the bottom, along w/ cable to the speaker. Those few small holes shouldn't affect a hand full of fans at the rear


P.S. I assume that photo is suggesting hot air rises to the top, as such, they have to get the hot air exhaust fan at the top, venting out
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That will just create turbulence and not actually circulate air in the entire enclosure. When cooling you really want air flow to change direction the least amount as possible. And since hot air is already moving up you just want to exhaust it out the top and bring fresh cool air in from the bottom. And you want to balance it, pressure in = pressure out.

Think of cooling your house with fans, if you have two windows in the front and one goes in and one goes out with fans, how will that cool the back of the house?
 
but at post #11, Nobu posted that amazon link, the 2nd photo from the top shows cool air comes in from the bottom, and hot air coming out at the top. Can that be move to the rear of the cabinet? In other words, cool air comes in from the bottom, and hot air coming out at the top from the back side of the cabinet?
 
Happy Hopping said:
but at post #11, Nobu posted that amazon link, the 2nd photo from the top shows cool air comes in from the bottom, and hot air coming out at the top. Can that be move to the rear of the cabinet? In other words, cool air comes in from the bottom, and hot air coming out at the top from the back side of the cabinet?
Click to expand...
That is fine. Maybe i misread but it sounded like you wanted the intake and exhaust fans side by side, which is what I was saying would do almost nothing. But bottom and back/top is fine.
 
okay, 1 quick question: you think 4 intake cool fan + 2 outtake heat fan will work ? because AC Infinity only support up to 6
 
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