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Author Topic: New mining room - need input for intake - exhaust setup  (Read 1118 times)
sloopy
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June 14, 2015, 09:17:03 PM
 #1


The summer months are brutal for me, and I thought I had a great space setup until I saw the windows to this "room".
There is only one large window which slides open. Half the window cannot be used.

So, I either have an intake, or exhaust, or split it into both. Fans I have covered, big ones, and I can make my own duct, or equivalent air routing methods which are proven. The source is the issue.

I have not yet thought of a cost effective, non-permanent damaging way to introduce another source for either an intake or exhaust.

The window I do have is a decent size, which I can measure if it matters, but say it is 30" X 30".

I don't want to get caught up in providing the specifications of my mini-farm, so I'm not asking for help to calculate CFM, etc, but I am sincerely asking for any advice on how to best cool a room with one window and no other way to provide another entrance / exit.

Say this window is the only way to move air in or out of the room and it is extremely preferable not to have anything hanging outside the window.

I am trying to cause the least amount of damage because I plan to sell this "room" in about a year, so would like to avoid ripping out the other part of the window, or cutting a hole through the brick on the outside.

I also do not want to draw attention to this as it is not noticeable unless I put something outside the window, but if there were to be a large 90 degree elbow pointing down for a cool air intake it becomes noticeable and there is too much car traffic for that.
Fortunately noise is not a concern.

Where I moved the miners from I had my exhaust much higher than the intake which was close to the ground. In this new space the power is cheaper, the room much larger, and I have the infrastructure to add a decent amount of miners. The overhead is available to double my current setup, but until I have this issue reasoned out I cannot run everything I currently own as I am pushing an average 65 on the miners now. The few S5s in the mix run the hottest, the S4s not far behind, and I have my SP20s clocked way back and still usually have at least one side pushing uncomfortably hot. The SP20s and S3+ units run the coolest, but still hotter than I think is good.


Any suggestions outside of going vertical because that still does not give me a good intake / exhaust scenario.

Thanks for any input!

Transaction fees go to the pools and the pools decide to pay them to the miners. Anything else, including off-chain solutions are stealing and not the way Bitcoin was intended to function.
Make the block size set by the pool. Pool = miners and they get the choice.
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June 14, 2015, 09:55:44 PM
 #2

Are you prepared to open that window all day and night? If that is ok, mount a wooden board on the window-sill and cut holes on the board to mount 2 fans, one moving air in and the other moving air out. If you want the window closed for security, you will have to cut holes and mount fans on the glass.
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June 14, 2015, 10:11:42 PM
 #3

Are you prepared to open that window all day and night? If that is ok, mount a wooden board on the window-sill and cut holes on the board to mount 2 fans, one moving air in and the other moving air out. If you want the window closed for security, you will have to cut holes and mount fans on the glass.

JB, thanks very much for the input.
Yes the window can remain open for months. Security is not an issue. Unfortunately it is high traffic with cars going by all the time, but not much foot traffic at all. I guess that is good and bad.

Regardless your idea may be the only thing I can do, which I thought about but even with "heat rising" and of course I would put the exhaust up top, I am concerned I will be pulling that exhaust right back in.
Although, I should be able to control that with the fans. IF I put the much larger one on the exhaust side it should push the exhaust further, faster. 

The miners are currently all sitting on a large wire racks across the room. There are stacks, but I should consider going vertical to make this work the best I think. I lose too much space by doing a vertical arrangement. though, no stacking :/

I may just have to try it. I ran the CFM numbers, but I do not know the heat to cool including CFM and static numbers, and my "duct" or air routing methods are a hodgepodge of things, but it works without any hard 90 degree turns.

There is an attic space, but I am concerned about how much heat I put up there and how it may affect the cooling in other parts of the facility. I was just up there last night and didn't see any vents to the outside in that area of the space or I would have disconnected the AC vent tot hat room and ran an exhaust to the outside. If I dump straight to the attic it may cause a huge heat buildup there.

Again, thank you for the input. I may not have any better choice.

Much appreciated!

Transaction fees go to the pools and the pools decide to pay them to the miners. Anything else, including off-chain solutions are stealing and not the way Bitcoin was intended to function.
Make the block size set by the pool. Pool = miners and they get the choice.
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June 14, 2015, 10:19:10 PM
 #4

Stick a couple of those S5's on the window-sill with the fans blowing out.  They'll take care of the exhaust. 


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sloopy
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June 14, 2015, 11:01:56 PM
 #5

Yes Sir, I can certainly give that a shot, but I would still be hurting for the make up air, which with the current setup just pulls the hot air blown out the window right back in.
I need make up air / an inlet.

I am strongly considering the attic area as an exhaust, but the distance either way in the attic -  to an attic vent is long, and it is not an easy area to get in. Maybe as a secondary temporary plan, or in addition to the board with two holes plan.

For my temp solution I am going with the board with two holes, but unless someone or me comes up with a better idea I may simply have to move some of the miners to a different area.

I should have done more research before I jumped, but regardless I will (with a little help from my BTCtalk friends) figure out a way to make it work.

Nothing worth it is ever easy Smiley

I will get there. I haven't spent all the money and days of work to let it go, oh no, I simply have to keep bouncing this idea around here and in my head and, remind myself anything is possible.

Transaction fees go to the pools and the pools decide to pay them to the miners. Anything else, including off-chain solutions are stealing and not the way Bitcoin was intended to function.
Make the block size set by the pool. Pool = miners and they get the choice.
philipma1957
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June 15, 2015, 01:23:15 AM
 #6

you need to tell us more about the window.  does it slide left right ,

does it open up down?

can you do a little on left and right?

can you do a little on top and bottom?

If not you have problems. fixing will be tough

I see BTC as the super highway and alt coins as taxis and trucks needed to move transactions.
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June 15, 2015, 12:06:59 PM
 #7

you need to tell us more about the window.  does it slide left right ,

does it open up down?

can you do a little on left and right?

can you do a little on top and bottom?

If not you have problems. fixing will be tough

To open, it slides right to left, and then the left half is completely covered.

Top and bottom or left and right over the right open side are doable.
When open, and the glass slid all the way left I have approximately 24"x24", maybe a little more.

I did not have anywhere open this evening to grab a piece of plywood, but I will do so tomorrow and make some air moving "homemade

ductwork" to feed an exhaust. I'm guessing the best thing is to split it in half and run it to the top hole.
I figured I will build a frame off the back of the mining rack from some cheap 1X whatevers I have and using a combination of large

sheets of plastic and the sheet insulation I will taper that over to the largest fan which is approximately 36" OD. I will try to mount

the fan close to the window and then come off the front of the fan with the plastic and attach it to the top half of the window. The

plastic is the large "drop plastic" used in painting, etc, and I can plain old duct tape the seams. The fan should not have any issue

moving air if I can keep it from sucking the plastic closed, but using the wood should help.

I am concerned the plastic may melt so I will crank things up slowly and watch for signs of this before ramping up.
I will organize the hottest running miners, S4s and S5s on the second shelf of the rack so they aren't close to the edges, and put the

S3+ around the outside and lower shelves. Also keeping the SP20s inside the ring under the hotter units.

I need to check the heat tolerance of this insulation sheeting but it is the same thing you see attached to the outside of homes before

the siding goes on, etc. That along with the 1X whatever scrap boards I have should help make a good frame for the plastic, but still be

malleable. I will hope the heat is pushed out with this fan with such force it rises quickly and doesn't get pulled right back in.

I'd considered using a second fan for the intake, doing the same type of mounting with the thick plastic sheeting and framework, but

I've reconsidered and think with the room sealed the way it is that this large fan pushing out with this many RPMs - CFM, that if the

static pressure holds on the exhaust that open bottom half of the window will bring the make up air in and create a current int eh room

to pull the air back around and over the racks being pulled by the miner fans.

What do you guys think? Will I pull the hot air right back in?

It is seriously hot right now, but I downclocked everything and put a 24" commercial fan blowing out the window for tonight.   None of

the girls are over 70 tonight and other than the S5s I think that will be the highest the temps should go but I also have a temporary

gap in the only door to this area which I cannot leave. I will have to seal it.

I am still thinking about the attic. I will have 100 degree days soon, so I'll have to do something creative pretty quick. As long as I

am using safe methods and materials is what matters. The aesthetics are not important at this point, just being able to mine without

damaging anything.

I'll want to put a filter over the intake part of that window, so maybe that will help with creating some resistance to pulling that hot

air back in as well.

I am also willing to purchase materials, different fan or blower, etc if it makes things work better, but I need to get something in

place pretty fast and don't really want to wait for something to ship, but, I am always open to suggestions.

The door to that room has swollen from the heat already it became difficult to close, and working in there for a few minutes is enough

to get a little dizzy heh. I need to get a thermometer in there to check ambient so I can compare after making changes.

Thanks for anything you think may work well. Nothing is to crazy for me as long as it safe. As I mentioned I will make sure of the temp

ratings on the sheet plastic and insulation board.

Transaction fees go to the pools and the pools decide to pay them to the miners. Anything else, including off-chain solutions are stealing and not the way Bitcoin was intended to function.
Make the block size set by the pool. Pool = miners and they get the choice.
philipma1957
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June 15, 2015, 05:02:24 PM
 #8


I would use plywood same size as the opening  say 24 by 24

I would cut a hole for exhaust  and mount an exhaust fan only in the window.

I would open the inside door and allow in air that way.

I see BTC as the super highway and alt coins as taxis and trucks needed to move transactions.
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June 15, 2015, 08:49:08 PM
 #9

Airking 9166F

http://www.airkinglimited.com/page/window-fan.html

3500+ CFM of exhuast or intake your choice.

If you exhuast the fan should suck air through the vents in the room or other places.  You can always intake the fan and put a vent into the sheetrock and have it exhaust to the attic.

Sheetrock repair is very cheap.

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sloopy
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June 15, 2015, 11:47:06 PM
 #10

Hmm, I'd considered exhaust to the attic in my last post, but figured it would just get too hot, but that seems about the best bet.

So it won't work to exhaust and intake out the same window will it? I'll pull the hot air right back in.

Yes, sheet rock repair is cheaper than the alternatives.

Can't open the door Phil. If I had a way to get crosswind I'd already have that done and wouldn't have posted, but I hear you on using the whole window.

By the way, I have a window opening 32" X 33" on that right half I can get too so I think I am going to try the two hole method just to see. A few hours and a piece of plywood aren't much today if my back stays in one piece heh.

I'll still have half the sheet of plywood if I need to change and go back to the fan taking up the entire window and exhaust in the attic.

I'll capture my temps before and after. Right now I have a giant industrial fan pulling right off the back of the mining rack. This baby is huge, and I have a smaller commercial fan that is probably 24" pushing right out the window. The "intake" at this point is under the door and whatever leaks in the room. Temps on the S4s are 64ish on the front and 69ish on the back. S5s are 65 and 72. Sp20s are 85 / 115 clocked at about 1Ths, and S3+ are 47 - 48. Ambient is about 85F outside right now. I need to measure the room.
 Apologies for mixing the C and F there, but it is how I live. Same with Inches and Metric. Just the way I have to work.

I could live with those temps, but they won't stay that way during our 105 degree days which are coming. Luckily we have rain scheduled all week.

I love this stuff.

Comments are very much appreciated.

Headed to the hardware store. I've been thinking about a router for circles anyway.

On a side note I found a great deal on a Gigabit 24 port Buffalo Switch today. 100 in USD. The thing looks new. I told the guy I'd loan him money to get his wife an anniversary present and he said he didn't want to owe anyone so there ya go. I am going to put this baby in production, and yeah I know Gigabit to 100 doesn't make a huge difference if much at all for mining, but it is nice to have a backup.

Transaction fees go to the pools and the pools decide to pay them to the miners. Anything else, including off-chain solutions are stealing and not the way Bitcoin was intended to function.
Make the block size set by the pool. Pool = miners and they get the choice.
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June 16, 2015, 01:25:01 AM
 #11

if you do 2 hole method in 1 window make a hole high for the exhaust fan.


 try to attach a box  on the outside of the plywood.. turn it upside down. facing the stock opening downward.  then use a hole saw to cut a few holes in the plywood and the attached planter box.


you can find these boxes in lowes home depot  etc.

inside the house you could put a lite duty filter on the holes you cut .  the down to the ground facing opening in the planter box and no fans for intake may allow for the best way to get air inside.



I see BTC as the super highway and alt coins as taxis and trucks needed to move transactions.
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