Negative Pressure and Heat Removal Design- Need Advice

[bmocrypto]

Hello,

Trying to come up with a solution to get rid of heat in proper way.

Diagram below represents proposed design. HOT aisle will be in the middle of the room with 10" (inch) intake fan (1200CFM) removing excess heat.

https://i.postimg.cc/vmCxnjbK/gpu.png

According to omnitecdesign room by 11'x13'x9' requires 257 CFM for negative pressure. That being said I'm hoping that 1200CFM intake should be enough to do the job.

I have two questions that I would love to get assistance with:

1)I have ability to reroute one of the HVAC conduits to the mining room and bring cold air. Questions around that. Since this is cold air do I have to run ducking all the way to the floor or let the cold air settle by itself? Additionally, Is there any potential harm for hardware equipment by introduction AC air?

2)There are two exaust windows as an option. One is located 12 FT from the HOT Aisle and second one 37 FT. 2nd window being preferred I wanted to ask if the exhaust distance will have an effect on the performance of the intake fan?

Thank you in advance. Any feedback is greatly appreciated!

[Coinfarm ventures]

The hot/cold aisle separation will not work with GPU rigs unless you have fans tied to the racks which force the air in the direction you want. You also need some kind of curtain or barrier between the hot & cold areas.

Yes, all ventilation fans will perform at lower CFM when static pressure is higher (when the duct is longer). These grow tent fans are designed for high static pressure, so you shouldn't have a problem. The worst type of fan for static pressure are Lasko box fans, where the 2500 CFM rating drops to near zero with even a small amount of airflow constriction.

I just recommend buying a grow tent, which will already have holes for ventilation that you can easily connect the ducting to. They already have air filters or they're very easy to install. Place the shelf inside the tent.

You won't need to open that little side duct as long as the airflow through the mining room is high enough. I recommend a minimum of 100 CFM per kW. If you use 60A of that 100A panel, which is 14.4 kW, you need 1440 CFM. So your ceiling fan will be enough.