Hi guys hoping to get some feedback on my room plan:
https://i.gyazo.com/d73e124bf0a2ce32e0198c927a095e8f.png#1 is my current plan: pull cold air in from the window and push them over rigs with fans behind each rig, then pull hot air out from the front of the rigs and use an exhaust fan in the ceiling to collect hot air and exhaust it out of the roof. This should be sufficient cooling for about the ~105 GPUs I can fit on that shelving unit
HOWEVER! I would like to leave open the possibility of expanding in the future without having to move the exhaust fan's ceiling location. So I was wondering if #2 would work if I double my size. As you can see I'd be using fans on the ground to push the incoming air up at all the rigs but I'm unsure if that 15 ft (4.5m) is too much distance to hope to carry the air.
Fwiw, I'm dealing with 75-85 Fahrenheit (24-29c) ambient temps
Any thoughts would be appreciated!
Getting this as efficient as you can is HVAC math. I'm good enough at HVAC to be dangerous, but I do my own work and haven't ever screwed anything up majorly. Your most limiting factor is probably input and exhaust air volume of the room based on the opening sizes. I'd calculate that first and then the fans you have pushing the air over the rigs may be an issue or a bonus, but if those are portable, easy to cope later. You want input and exhaust as far away from each other in the room as possible. Ideally you also input from near or in the floor and exhaust from the ceiling or very near as well. Guessing is why most home cooling systems are inefficient, almost nobody nobody does the math, they just slam in a too big or too small system and cash the checks.
What type of fans are you going to use for input and exhaust?
