At your data center yes. Not in ours.

In ours the hot aisle is completely enclosed with storm doors on both ends and plates from the top of the racks to the ceiling. There are almost no ceiling tiles in that section as that entire space is the return back to the CRAC units. It's generally 80 degrees in there. Our DC strictly enforces gear pulling air in the front and ehausting it out the rear.

All cables are above the racks on the cold side. Cold air flows down the aisles and drops out of the ceiling. As cold air falls that's a win. And of course hot air rises also a win.

Hot aisle cold aisle is much simpler to maintain when customers are renting racks rather than cages.

We see a mix of this depending on who built the DC. Raised floors are very expensive while duct-work is much less so.

- Larry "DrFranken" Bolhuis - Personal Development IBM i timeshare service. - Commercial IBM i Cloud Hosting.

On 1/10/2020 11:11 AM, Rob Berendt wrote:
Hot aisle / cold aisle still has the cooling coming from the floor. At least at the GR DC.

Rob Berendt

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