Using a Grow Tent for a mining rig cooling case?

[seanverlast]

Are you venting your hot air outside from the output of exhaust fan(s)?  Also, are you bringing in air from outside on the intake side?  That is what made a big difference for me.

I am jealous of your temps.  I live in Austin, TX and in the summertime it gets brutally hot here.

Yes, exhaust goes outside and intake from the outside as well, ducts are some 8 feet away from each other. I know TX is hot, we get some 115F here during the summer as well... but we get very cold winters, we had like 5F for some weeks last winter with snow and everything. I was running all my GPUs with just a few fans and a 2 feet window open, thats how cold it was.

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[Stonehands]

So I also live in Austin, TX, and am planning a setup using a grow tent.  @Saltyminer - in your experience, does simply pulling the air from outside and venting it to the outside keep the temps low enough?  How large is your intake and exhaust ducting?  I've been considering doing weird things like tapping into the air intake of my HVAC system to pull the cool air from, and then vent it either into the attic or to the outside.  Some tips from you guys would be very welcome before I ruin my house ha!

[saltyminer]

I ran my rigs in a tent last summer and pulling air from outside and venting kept the cards at a reasonable temp.  I would not recommend pulling air from your HVAC system, that will likely put a huge strain on your unit and could cause expensive damage.  Bring in 100F air from outside is not ideal, but I figure that it is probably similar in temp to what a GPU would be exposed to inside a gaming PC while playing a game.  I run 4 fans with 8" ducts, 2 intake and 2 exhaust.  The inside of the tent has an ambient temp of 90F to 100F, which sucks, but won't run my electric bill up and the cards still run around 65C. 

[Stonehands]

4 fans? Wow.  I'm only running 10 gpu, and 6 hard drives...maybe 1400w total.  The tent is in my garage.  So I'm hoping I can get away with a single 8" exhaust duct with a 450ish cfm fan that pumps it out through a vent in my attic to the outside.  Ideally I wouldn't need intake ducting at all (since i'm in the garage which isn't air tight), I'll just open up the flaps on the tent at the bottom.  Think that could work?

[saltyminer]

It sounds like you should be ok, the good thing is you can always add another fan if needed.  Using a passive intake and the fan for exhaust definitely makes the most sense.