This contraption has its own 20A circuit.
It shares the circuit with 3 industrial fan blowing out towards the windows.
Building rules prohibits me from modifying the window and install barn fans...
It eats 520watts and can suck 65 metre square of air volume per minute.
Its currently turned off and will in good use when its needed on hot days.
The warehouse has 63Amps/3-Phase 220-240v power so my electrician says I can play with 3 x 63amp = 189amps - less 10-20% for safety buffer.
So 150amps divide by 5amps (6xGPU-rig) or about 8amps for the 12-13xGPU rigs = 30 rigs (6xGPU-rigs) or 18 x 12-13xGPU-rigs.