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Hey I posted in your other thread.
Your intakes should be 2x the volume of your exhaust for proper negative pressure and efficient passive extraction of the heat.
If your exhaust is a larger volume than your intake, than it's trapping heat inside the tent and not able to efficiently pull it out.
Example: If I had 12" exhaust, i'd want 24" intake or equivalent.
I see, so you are talking in terms of volume and not CFM? |
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With that much CFM you definitely won't need any intake fans, lol. That tent will be sucking itself inward with all of the negative pressure.
4 fans total? or 2 fans total?
FYI Intake should be approx 2x what the exhaust is.
Intake should be twice the exhaust? So for 3000CFM hot air exhaust, i need 6000CFM intake? Wouldn't that create positive pressure? I thought negative would be better? I calculate based on total inches/volume. Yes intake should be twice the volume as the exhaust for proper negative pressure. Same thing weed growers do to prevent odor/smells, keeps the air flowing in one direction only through a filter that gets rid of the smell. They use this same system. You can buy flange kits up to 12" in duct size and customize/add them to your tent. I am pretty sure you meant the other way around... More air going out then going in for negative pressure... Otherwise it doesn't make sense... |
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^^^ This is just not correct at all... ^^^
With positive pressure (more going in than coming out) the hot air in the grow tent will be forced out of any gaps that may exist (zips, doors etc.). You want NEGATIVE pressure inside the grow tent. That means that all the hot air is removed by the fans sucking air out and is not forced into the room.
To be honest, you don't really need intake fans... If you have exhaust fans, the negative pressure will suck air from the room into the grow tent, making the intake fans relatively unecessary
Yes, i was wondering how would that affect the room though. With that much amount of air being sucked out, wouldn't it make the room extremely dry or something else? I guess i need to keep some ventilation on in the room too. |
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With that much CFM you definitely won't need any intake fans, lol. That tent will be sucking itself inward with all of the negative pressure.
4 fans total? or 2 fans total?
FYI Intake should be approx 2x what the exhaust is.
Intake should be twice the exhaust? So for 3000CFM hot air exhaust, i need 6000CFM intake? Wouldn't that create positive pressure? I thought negative would be better? |
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So I have started to my rigs in a grow tent as they made my apartment basically unlivable due to the heat. I currently use two 6' inline fans to pump air out, and a 12K BTU standing AC to pump cold air in it (it's using 15kW!). I was wondering what temperature should i get within the tent. It's at 104F when i seal the tent and ~90F when i don't, basically dissipating the heat into my small one bedroom apartment. Should i use bigger fans? Was thinking of changing to 12' 1060CFM ones instead of 400CFM. Is 104F too high?
Thanks
Best option would be to vent the AC into the tent and have an exhaust fan move the air outside of your apartment through a window. You shouldn't be venting that hot air into your apartment. Yes, I agree using exhaust. Divided into 2 parts, the first part throws hot air from your RIG/tent/room and other part throw air outside but I doubt the weather in TEXAS if it can maximally suck the air from out inwards can decrese the temperature during the daytime. Yeah, in the summer it'll be around 100-110F during day. Maybe cooler during night though. |
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So I have started to my rigs in a grow tent as they made my apartment basically unlivable due to the heat. I currently use two 6' inline fans to pump air out, and a 12K BTU standing AC to pump cold air in it (it's using 15kW!). I was wondering what temperature should i get within the tent. It's at 104F when i seal the tent and ~90F when i don't, basically dissipating the heat into my small one bedroom apartment. Should i use bigger fans? Was thinking of changing to 12' 1060CFM ones instead of 400CFM. Is 104F too high?
Thanks
Best option would be to vent the AC into the tent and have an exhaust fan move the air outside of your apartment through a window. You shouldn't be venting that hot air into your apartment. Yes, i am venting them outside. I use both the dryer one and I have combined the other one through a standing AC that has those window kit. I got a 12,000 BTU standing AC but looks like it's not enough for 7 rigs, the tent stays at 100F. And I don't think the AC can withstand 24/7 operations... The AC is getting pretty hot after 48 hours. Here I have an image of my setup:  I would be in the end putting 18 rigs in this tent. However I am very skeptical if i would ever be able to suck enough air out and provide enough AC... By the looks of it, i need to get 4 more AC unit... that's an additional 400$ monthly electricity bill. |
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U should do somethin about the noise. Over may hours or days, it could drive u psychologically nuts if u keep enduring it. It is not healthy to endure this 24/7 at home.
Wat u need is stronger fans and maybe some high density rockwool to block the noise so it does not harm your health. Well, GPU noise isnt so bad compared to asics. So, sound wise, u may be ok.
Consider underclocking the gpu if it gets too bad. Besides air-con, there is nothing much u can do. However I dont think adding more air-conditioners are worth it. It may be better to just underclock in summer.
What do you think of this set up? This potentially could host 9 rigs, or 18 if i do two rows. I would be moving around 3000 CFM in. I haven't decided yet if i need to do the same on the intake, or just use negative pressure. I would use those extra input on the bottom and point them outside. |
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You're concept of cooling is flawed. It is not efficient to try to "cool" the miners. What you have to deal with is getting rid of the waste heat. Two fundamentally different principals.
Also, please describe your "rigs", it looks like you're talking about GPU and this is the Bitcoin mining forum which means ASICs.
right, sorry. It's a 6 gpu rig with open air frame. I have 1060s to 1080ti in there. A rig runs around 800-900kW. If your rigs are using 800-900kW power, no wonder you have heat problems. That's about 256 Tons Of Air Conditioning. 900kW at 240Vac, .9pf = ~ 4100 Amps? This is not in an apartment, or your power consumption numbers are off. I think i was off in my metrics again... A single gpu rig 6 gpus, in total it should consume around 800-900W, not kW... I am consuming around 210kWh per day according to my electric company. |
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We are in Austin and are considering hosting miners in our warehouse if you are interested. MOJO miner, are you from Odessa?
I am actually in Austin! Shoot me a pm, let's talk about it. |
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What region are you looking to set up in?
I live in Texas man, i am preparing for the harsh summer we are going to get. |
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I use a tier shelving unit 7ft high 2ft deep by 4 ft wide. Have a cover on it. 36 x 580rx. Air in it is 45c. Cards around 73c-80c and I have a 6inch duct grow op fan sucking air out of it. The smaller the cubic ft area you have, the quicker the air is changed. I looked at it like cubic ft area with cfm 440cfm ÷ (4x2x7=56) = 7.85 times per minute. Then divide 60 seconds by the result. 7.62 seconds air is totally changed in that area. I'm happy with it and it keeps everything cool. Just my cents 100w fan vs 1500w a.c.....
That's nice, but isn't 45c for air and 73-80c for gpus a bit on the high end? Your gpu fans must be running at 80% all the times right? |
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You are crazy trying to stuff that into a small apartment. There is no fix other than dont do that. Its not like you can cut holes and add ventilation. You are already throwing most of your profits away trying to run AC
Hmmm yeah i agree. It's that my operations are not big enough to rent an industrial space and too big for an apartment. All i could find was 2000$ for 1500 sq ft industrial space with triple phase. I would need at least 50 rigs to justify the cost. |
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So I have started to my rigs in a grow tent as they made my apartment basically unlivable due to the heat. I currently use two 6' inline fans to pump air out, and a 12K BTU standing AC to pump cold air in it (it's using 15kW!). I was wondering what temperature should i get within the tent. It's at 104F when i seal the tent and ~90F when i don't, basically dissipating the heat into my small one bedroom apartment. Should i use bigger fans? Was thinking of changing to 12' 1060CFM ones instead of 400CFM. Is 104F too high?
Thanks
No, you're not using 15kW dude. Average 12BTU ac uses like 1200-1500 watts, not 15,000 watts. Also those inline fans need to be pointed OUTSIDE. not back into the room. All you're doing is generating heat, and recirculating the new heat your generating back into the tent. ac creates heat. where's the exhaust going? back into the room? that's not going to work. exhaust on the tent. where's that going? back into the room? that's not going to work. Yes, 1.5kW typo there. I am pointing them outside and also using the dryer vent to go out. Definitely can't have them heat the room. |
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You're concept of cooling is flawed. It is not efficient to try to "cool" the miners. What you have to deal with is getting rid of the waste heat. Two fundamentally different principals.
Also, please describe your "rigs", it looks like you're talking about GPU and this is the Bitcoin mining forum which means ASICs.
right, sorry. It's a 6 gpu rig with open air frame. I have 1060s to 1080ti in there. A rig runs around 800-900kW. |
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Yah i've looking at those, however i was thinking of having like 100 gpus (currently at 42) in a 4'x8' tent. Looks like it not feasible at them moment. |
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How many rigs/GPU's are you running in your 1 bedroom apartment?
I have 7 6gpu rigs in my apartment atm. I have used the outlets from my range and plan to do the same with my dryer too. going all in |
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So I have started to my rigs in a grow tent as they made my apartment basically unlivable due to the heat. I currently use two 6' inline fans to pump air out, and a 12K BTU standing AC to pump cold air in it (it's using 15kW!). I was wondering what temperature should i get within the tent. It's at 104F when i seal the tent and ~90F when i don't, basically dissipating the heat into my small one bedroom apartment. Should i use bigger fans? Was thinking of changing to 12' 1060CFM ones instead of 400CFM. Is 104F too high?
Thanks
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Hi!
I have just started to mine and found lots of useful posts in here. However i think i have maybe outgrown my capacity. I have 10 rigs in my small one bedroom apartment and I have the AC turned on 24/7 even in a 65 degree weather... I have tried grow tent, standing AC, negative pressure, but in vain. Anyone has any tips? Also the summer in Texas gets pretty hot too... Any experience on how i can deal with that weather? Thank! Greatly appreciated!
Mojominer
How did u deal with the noise and heat? AC isnt a good idea. U should go for alot of fans for airflow. That's what i am having issues with atm. I am using two ~400 inline fans to suck to air out from my grow tent. However I think that it's not enough for the 7 6gpu rigs i have in there. Hopefully I sleep pretty dead and once i close my bedroom door, it's not as bad. |
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Hi!
I have just started to mine and found lots of useful posts in here. However i think i have maybe outgrown my capacity. I have 10 rigs in my small one bedroom apartment and I have the AC turned on 24/7 even in a 65 degree weather... I have tried grow tent, standing AC, negative pressure, but in vain. Anyone has any tips? Also the summer in Texas gets pretty hot too... Any experience on how i can deal with that weather? Thank! Greatly appreciated!
Mojominer
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Houston has a few, Im actually about to start building out a warehouse in January. MCHouston is user on here who might be able to help in Houston.
Awesome, thanks for that. Ideally I'd like to start closer to Austin due to where I live but I'm not against regular trips out to Houston if the facility is secure. Have you had any luck? I am in the austin area also |
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