Installation of 70 S9

[Noface12]

I have trouble with this set up.

I have the electric part solved. I connected and ran 30 S9. After a like 7-8 hours, the temperature in the warehouse was 42C (107F).
The warehouse has an exhaust of 14x14" I think of 700 CFM.
I have a window opened so air can come inside.

I read that each S9 is 250CFM~4680BTU.

In order to solve my problem, I need to install a 20.000CFM exhaust + fan.
All together, it is costing me about USD17.000.

You think it is normal to pay so much for ventilation to install 70 S9?

[Steamtyme]

Is that a cost of 17,000$ wow.

How have you set up the warehouse? Are you using the hot/cold aisle setup?


I've never run anything this large but for 70 S9's at 250 CFM you need to exhaust 17500CFM

https://www.globalindustrial.ca/p/hvac/exhaust-fans/exhaust-and-supply/42-industrial-duty-exhaust-fan-3-phase-2-hp

Found this with a quick search,  1 for exhaust and maybe this

You could even 2 of these.

https://www.globalindustrial.ca/p/hvac/exhaust-fans/exhaust-and-supply/30-industrial-duty-exhaust-fan-1-phase-3-4-hp

And if you felt like doing forced supply air here's a filtered supply air fan. (This ones pricey)

https://www.industrialfansdirect.com/collections/intake-supply-air-fans/products/ncfi48-h-3t


In the end I would just say do some research on supply and exhaust fans and see what you can come up with. You can even build your own filter house for the intake air.

[ccgllc]

You think it is normal to pay so much for ventilation to install 70 S9?

Well, your 20,000 CFM number is in the right ballpark.  Not sure why you were caught unaware of the cooling needs - there are many MANY threads on that topic.

Regarding cost, no, $17,000 seems excessive - unless the warehouse owner is just ripping you off for the right to modify their warehouse.  Or your doing this on the East Coast of USA or California or maybe Chicago.

Remember that what goes out must come in.  For S9s, I recommend about 1 square foot of screened opening per miner, so the equivalent of a 7 foot by 10 foot screened in area.

Absolutely layout your miners in a hot aisle/cold aisle arrangement - you do NOT want any exhaust air from the back of the miners mixing with their intake air.

I do hope your in an area with cool outside air.

[Noface12]

I live in Canada, Quebec.

The problem is that my warehouse is kinda isolated. It only has one window.
The warehouse has an exhaust of 14x14" which I believe is 700CFM (useless).

The only way I can install fans is on the roof and it is extremely expensive.

The US$17.000 is for the whole installation and equipment.

1 Exhaust fan of 20.000CFM
1 Fan filtered of 20.000CFM
custom made ducts
The roofer of what ever is call. The guy who open the hole on the roof and puts a base and make sure the roof can support the weight.
The ventilation guy to install the whole set up.

My warehouse is 17 feet high.

I was thinking to do a wooden box where it will have the square holes for each miner fan (exhaust). I will put that box just behind the rack and the fan of the miner will enter there.
Then all the miners will be exhausting the hot air inside that box.
That box, on the ceiling of the box, it will have the custom made ducts connected up to the roof of the warehouse and connected to the extractor .

So the hot air of miners go inside the box, the ducts connected to the ceiling of the box and extractor on the roof pulling the hot air outside.

Then we have another fan on the roof bringing air from outside to inside the warehouse, of course filtered.


That is the only best idea we had.

[ccgllc]

Is it possible for you to use vertically mounted fans on an outside wall?  The exhaust fan would only need to be a few feet above your top miner.  You could then build a "hot aisle".  Perhaps a standard stick wall (2x4) with 5/8" fire rated drywall.  You could put your shelves in against that wall and cut out the drywall for the miners to stick through.  A stock carpentry wall and wall work should be cheaper than roof work, and would not require any additional ducting since the wall (and a short, say, 4' wide ceiling) would be the duct.

You would still need intake air.  That doesn't have to be powered if the whole is big enough, but would if your much below that 70 square feet I previously mentioned.  But that could be in any wall space not contained by the hot aisle box.

The advantage, besides cost, is that rain will be less likely to come in a louvered wall fan.  You will want to intake fan to be at least a few feet away from any miners just in case some rain does come in (and some will unless your using a pretty fine filter that may block up when it gets wet and starve your machines of air).

[Noface12]

We tough of that idea before but the landlord doesn't let me modify the walls.

There is a garage door which is like 14ft long x 8ft high.

It is the façade of the warehouse so I cannot do anything crazy. The new idea is to cut small square on the garage door (wood made) and stick the exhaust antmzner trough there.

We need to install a drainable louver to cover the garage door from outside. Something like this.
https://m.grainger.com/mobile/product/DAYTON-Drainable-Louver-5NKK0
or like this
https://www.herculeslouvers.com/wp-content/uploads/2015/09/louvered_screening_06.jpg

We are planing to leave about 2 feet from the garage door to the louver cover.

I wonder if it will be enough space for the hot air to go away and pass trough the louver.

[ccgllc]

I'm guessing the landlord will not appreciate the garage door being permanently modified.

That would leave you two options:

1) Uninstall it, and build a wall there.

2) Open it and leave it open, then build an interior wall around it.

In either case, you could then build your hot aisle box and install your exhaust fan in the new wall.

If space permits, I'd suggest leaving room at one end of that 14' opening for an intake fan, and place the exhaust fan at the other end.  You want them as far apart as possible to avoid mixing the air.  Think about your prevailing wind direction when selecting which end of the opening they go.  You want the intake fan up-wind.

You could then place your miners around the interior perimeter of the hot aisle box.