My first mining setup / mini-farm

I wanted to share some pics, specs, and details about my first mining setup. I'm really happy with how everything turned out and how well it’s performing, all thanks to the tips and info I've gathered here. Hopefully, it’ll help someone else thinking about a small setup, or just be interesting for those into casual Bitcoin mining like me. I’m already on my third project, so I’ll post about projects two and three when I get a chance! So, I’ve got this split-room design with two areas: a ‘cold’ room for the miners, shelving, and infrastructure, and a ‘hot’ room where the exhaust goes. This setup keeps the miners cool and stops hot air from recycling back into them. The air intake for the cold room is filtered to keep out dust and moisture. This design not only extends the equipment's life but also boosts efficiency since the miners use less power when they’re cooler. Plus, it makes the workspace more comfortable since it stays cool and the miners are pretty quiet (fans aren’t cranking up). Right now, it's running at 2600 TH/s (2.6PH), but I expect it to hit around 3.2PH by August when my next batch of equipment should arrive. I'm currently using a mix of Whatsminer M31S+ and the Antminer 17 series, but I’m upgrading the 17s to S19 Pros in a few weeks. The setup is in a basement below ground level. This room used to have a coal-fired boiler and was also a coal storage area. It even has two handy coal delivery hatches that I can use.

Did you just copy-paste my mini-farm? that is mining plagiarism, ya like the split-room was my idea anyway.   Such a neat set-up you got right there, very well done, I should send you some merit as soon as my bag is filled. I wish I could find those 25mm insulation boards where I live, do they have a more common name? like a material name or something, I am stuck with MDF sheets that are hard to cut, I have to use a CNC machine to get the wholes close to perfect and it still end up a bit off. What is the total power consumption at the moment? 90-100kw ? Make sure your 3 phases are balanced to avoid getting into troubles, also wait for a hot day to come by and test all wires' temperature to see if they are warm / hot, I became paranoid after the last incident and the new farm has over-sized wiring to avoid any unplanned fireworks.

Funnily enough - yes I learned a lot from your post, but didn't fancy the idea of using MDF for the divider (glutton for punishment there) - that does sound like hard work! I saw another post elsewhere where they had used the insulation board material that I used. Also, I saw on a YouTube video (VoskCoin channel) a large commercial mining farm which also uses insulation board for this same purpose. It is literally perfect and so easy to work with. I think the original manufacturer / inventor is a company called Recticel but there are many others that manufacture it. 'Quinn' is another manufacturer. Not sure which country you are but try searching for 'Recticel insulation board' / 'Europhane board' / 'Europhane' / 'insulation board' / 'PIR board' / 'Polyisocyanurate board' (those are the search terms I'd try). It's approx 110kw total. The wiring gets hot on a hot day, but nothing to worry about... The supply cable is XLPE which is rated for 90deg. I have a thermal thermometer gun which I use to keep an eye on everything. The supply cable has never gone above 70deg, and the individual miner cables seldom go above 55deg (rated up to 70deg). Typically the miner fan RPMS are around 2000-2400 on the antminers, and around 3000rpm on the Whatsminers - which is a good sign the airflow is excellent. With the first set of fans I used, I found they were only effective when the air was cool-to-warm outside. On hot days, the miners increased their own fan speeds, which in turn increased the amount of airflow going into the 'hot' room. Eventually the airflow exceeded the CFM of the extractor fans, at which point everything went downhill fast. But the new extractor fans I've fitted are much higher quality with almost 60% increased CFM, which is enough to deal with every miner on full RPM (which never happens now).

@ Danieleither nice work Mikeywith here are links to boards  I  don't know sellers other then usa lowes https://www.lowes.com/pd/Common-1-in-x-4-ft-x-8-ft-Actual-0-9375-in-x-3-875-ft-x-7-875-ft-R-Expanded-Polystyrene-Foam-Board-Insulation/3365576 https://www.alibaba.com/product-detail/5-Years-Warranty-Insulation-Foam-Board_62409612287.html https://www.alibaba.com/product-detail/High-density-closed-cell-PIR-rigid_62526770985.html https://www.alibaba.com/product-detail/Roof-and-wall-thermal-insulation-material_1600078186987.html

That is a very neat job mate. Takes a lot of skill and guts to put something together of that size, and at home. Lucky you have good power costs. What sort of temps are you getting on the miners, any problems with them stopping during heat spikes?

Thank you - although it's not at home I rent some old wartime bomb bunkers (for storing professional fireworks) on a site that is now a windfarm. I am well connected with the site owners (pun not intended). They've allowed me to rent some other disused buildings on the site for hardware storage, and power is basically free but limited to the size of the supplies in the buildings - (so I can't just go putting in huge bitcoin mines)... But it works nicely for small setups like this and the site is secure. On a VERY hot day, and just once so far, the Whatsminers threw up some error codes for PSU protection, and when you look up the error code in documentation it says "check operating temperatures" or something like that, but they never cut out and the errors just disappeared when it got cooler.

Fans are pretty cheap, and since you have free power then you wouldn't worry much about the tiny amount of power they will consume running on higher RPM, so during summer time you might want to increase the fan-speed keep them static at say 90-100%, this is what I do to go through hot summer days, remember that you have some of the lowest quality gears (17 series) those have a very bad solder paste and high temps will eventually and easily break them, it's great to have gears of such size but the downside is that if you happen to lose a board then that's a lot of hashrate gone with the wind. Thanks a lot for the information guys, I think I now have a better understanding about these insulation boards, I will try to source them locally.

I am very impressed with your electrical supply. Very important note for you, off-the-shelf extension cables could be very risky. I only have two GPU based miners placed in my house. These beasts takes up 1800 watt of input. I have also connected them directly to the electrical grid meter (thats what they call it in India) from where direct electricity can be drawn. I have one breaker in between. However, over the period of time C13-C14 do not support the heating. I had incidence where my whole extension board burnt to dust. I am not sure how common is tis problem but my experience was horrible. I have switched to heavy duty wiring now for the room where I have installed miners. But considering your safety checks, I see myself next to zero in my set up. Lolz.

Hmmm, I hope you're wrong about the extension cables - I have used these in 4 small farms now without issues. The cables in this particular installation have been running constantly since April 2020. They are rated at 10A / 2300W each = 4600W per pair. Deduct 20% for constant load / safety = 3680W per pair, running 3250W load. The Whatsminers are a different matter though, they pull up to 3700W at 240v. Initially, I installed 1.5mm cable which did overheat - but later upgraded to 2.5mm cable.

Can you share the calculation for the airflow of the room? I'm planning to do a familiar farm. But mine will have some swamp coolers (since my area reaches outside ambient temperature of upto 48 deg Celsius in the summer).

For me it's pretty simple, because my farms are situated in a relatively cool climate (temperatures are rarely over 30 deg here in summer) - and most of the year in the 10-20 degrees range. I just made sure that my extractor fans were capable of moving more air than the miners would exhaust. Obviously it's important to ensure adequate intake also. For 17 / 19-series Bitmain, expect up to 500cfm of expelled air per miner (credit @philipma1957). So if you're running 20 of the above, your exhaust fans need to be capable of moving 10,000cfm (20 x 500). You should consider also that the exhaust fans may lose efficiency over time (e.g. as dust builds up on the blades) so it would be sensible practice to allow a margin on top of this (so 10,000cfm + 15% = 11,500cfm for 20 miners). Depending on the country, the fan capacity may be quoted differently e.g. meters per minute or meters per hour - but there are plenty of calculators and formulas online to convert into cfm.

As well as calculators to convert watts/kwatts to BTU so you have an idea of the heat load miners produce.

I'd estimate this cost about £6000 GBP to install and setup (everything apart from the miners). That's around $8000 USD

Do you happen to know how much is expelled by the antminer s9?

Since the dimensions of the fan are identical to 17/19 series, you 'could' assume 250cfm (500 / 2), however it's just a guestimate.

So I think assuming 270cfm would be a safe number. Assuming I have this number, for 50 miners that would be 270 x 50 = 13,500cfm. Assuming every miner burns 1450W, I saw an online calculator to calculate the W to BTU/hr which is 1W=3.412BTU/hr ( I don't know if this is correct.) So 1450W x 50 x 3.412 = 247,370 btu/hr. I don't know if this is correct or not. But if anybody knows how to calculate to get rid of this heat please help me. In the summer the ambient temperature here reaches upto about 49 degree Celsius sometimes.

49c is very hot. s9's have after market software. Braiins + You can clock the s9's down to 1000 watts set the fans to 95%. and still get about 12.4 th from them https://bitcointalk.org/index.php?topic=5036844.0 do it for the 3 hottest months.

Could someone advise why my images no longer show in this post? I want to send this to someone I've sold some miners to (to help them build their first hot/cold setup). The images have not been removed at the source site (imgur). What do I need to do to fix this so images show again?

It has or rather had something to do with "Imgur's imposed limits on IPs" and to put a stop to this recurring issue [at the time], "theymos decided to also put a limit" on Imgur's embedded images. - It's worth mentioning that you can post direct Imgur links without any issues. Alternatively, you can show them the "archived link" instead. Use another image hosting to reupload/repost them: e.g. TalkImg.com - Image hosting for BitcoinTalk BTW, I quickly went through some of the images and honestly, I have mixed feelings about wooden structures [will take a better look when you reupload them].

Brilliant - thank you! Photos updated and all working again. P.s. interested to know why you have "mixed feelings" about wooden structures?