Temp at Level 3 data centers

Keith Stokes keiths at neilltech.com
Thu Oct 12 22:57:30 CST 2017

If you are using hot/cold aisles and don't fill the rack, don't forget you have to put in blank panels. 


Keith Stokes

> On Oct 12, 2017, at 5:45 PM, William Herrin <bill at herrin.us> wrote:
> On Wed, Oct 11, 2017 at 8:31 AM, David Hubbard <
> dhubbard at dino.hostasaurus.com> wrote:
>> Curious if anyone on here colo’s equipment at a Level 3 facility and has
>> found the temperature unacceptably warm?  I’m having that experience
>> currently, where ambient temp is in the 80’s, but they tell me that’s
>> perfectly fine because vented tiles have been placed in front of all
>> equipment racks.
> Hi David,
> The thing I'm not understanding in this thread is that the last time I
> checked Level 3 was a premium player not a cost player. Has that changed?
> If a premium data center vendor is asking you to swallow 80F in the cold
> aisle, something is very wrong. But realize I just said 80F in the *cold
> aisle*. DC cooling is not about "ambient" or "sensible cooling" or similar
> terms bandied about by ordinary HVAC professionals. In a data center, air
> doesn't really stack up anywhere. It flows.
> If you haven't physically checked your racks, it's time to do that. There
> are lots of reasons for high temps in the cabinet which aren't the DC's
> fault.
> Is all the air flow in your cabinet correctly moving from the cold aisle to
> the hot aisle? Even those side-venting Cisco switches? You're sure? If
> you're looping air inside the cabinet, that's your fault.
> Have you or your rack neighbors exceeded the heat density that the DC's
> HVAC system supports? If you have, the air in the hot aisle may be looping
> over the top of the cabinets and back in to your servers. You can't
> necessarily fill a cabinet with equipment. When you reach the allowable
> heat density, you have to start filling the next cabinet. I've seen DC
> cabinets left half empty for exactly this reason.
> Regards,
> Bill Herrin
> -- 
> William Herrin ................ herrin at dirtside.com  bill at herrin.us
> Dirtside Systems ......... Web: <http://www.dirtside.com/>

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