Thanks for feedbacks !
Using both or your suggestions :
> container is lifted and floor of the container is grating with one boxed fan (
https://powerstarelectricals.co.uk/industrial-extractor-exhaust-axial-blower-ventilation-wall-mounted-plate-fan-151-p.asp ) under each shelf (one shelf is 24 GPUs on 2 floors - each floor is 12 GPUs) with each shelf let the air go through (metal grating shelfs)
> At the opposite one boxed fan on the roof to exhaust air so air is going through the shelfs end components
@tg88 when temp outside are 30 ° C what temp inside the container ? is it closed also in summer? what temperature for your GPUs ? Thanks for the drawing and pics

!
@nsummy it's for a project that would need to be mobile. Have experience on 200 Gpu small farm but in a regular warehouse not in a container. Yes GPUs would be sitting in the open.