Need Help with Heat Removal and Negative Pressure Design

Hey everyone, I'm trying to find a good way to manage heat removal effectively. The diagram below shows my proposed setup. The HOT aisle will be right in the center of the room, and I plan to use a 10" intake fan (1200 CFM) to pull out the excess heat. According to omnitecdesign, for a room that’s 11’x13’x9’, I need about 257 CFM for negative pressure. So, I’m hoping that my 1200 CFM intake will get the job done. I've got a couple of questions where I could really use some insight: 1) I can redirect one of the HVAC ducts to the mining room to bring in cold air. Should I run the ducting all the way to the floor, or can I just let the cold air settle on its own? Also, could introducing AC air cause any issues for the hardware? 2) There are two exhaust windows I could use. One is 12 FT away from the HOT aisle, and the other is 37 FT away. I’m leaning towards the second window. Will the distance of the exhaust impact how well the intake fan works? Thanks a lot for any input! I'm looking forward to your advice.

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.