https://bit.ly/tTNJbU  

https://bit.ly/rTTVDh  

https://bit.ly/tbSuRU  

https://bit.ly/u5ApaI  

https://tiny.cc/hkg6x  

https://bit.ly/rFtjbp    

https://bit.ly/tQCRTO  

A well designed rack environment would include cold aisles (in front of the equipment with the AC vents) and hot aisles (behind the equipment with the air returns). Then the racks would have no gaps between the rack mounted equipment. If there are gaps between the equipment, then spacers are added to block air flow.

https://bit.ly/vFAx9U  

https://bit.ly/tsJOgn