RE: BTU Question for a small Computer room

If your AC system is not on your UPS, doesn't your computer room heat up
rather quickly if you lose power?  

We have dual 4 ton AC units for our computer room (7 400s, dozen Windoze
servers and various networking gear/tape drives,etc.).  Each can hold the
temp in the event one is lost.  Our 14KvA UPS is in a separate room and the
entire facility is backed up by 2 natural gas generators.  One 20KVa unit
powers the UPS which powers all the 400s, server, comm gear, phone, etc, and
a 12KvA generator that powers the AC units, house lights and a few other non
essential things.  The entire place is monitored with power sensors and
environmental sensors which report everything via a web interface or alerts
via cell phones.  We go in the data center once a week to rotate tapes in
all the 3570 drives.  Our data center is not even in the same building as
our offices (across the parking lot).  
cjg

Carl J. Galgano
EDI Consulting Services, Inc.
600 Kennesaw Avenue, Suite 400
Marietta, GA  30060
(770) 422-2995 - voice
(419) 730-8212 - fax
mailto:cgalgano@xxxxxxxxxxxxxxxxx
http://www.ediconsulting.com
AS400 EDI, Networking, E-Commerce and Communications Consulting and
Implementation 
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-----Original Message-----
From: James H H Lampert [mailto:jamesl@xxxxxxxxxxx] 
Sent: Thursday, June 17, 2004 11:45 AM
To: midrange-l@xxxxxxxxxxxx
Subject: Re: BTU Question for a small Computer room


For what it's worth:

We have a 170, 2 Linux boxes, 3 Windoze boxes, 2 UPSs, and assorted
networking hardware all running 24/7, along with a 40s and a D02 running as
needed, all in a confined space. Instead of a dedicated air conditioner, we
have a high security (steel frame with expanded metal, not wire mesh) screen
door (we call the place "the cage") and a big industrial roof-mounted
exhaust fan (on a speed controller, and tied into one of the UPSs). We also
keep a thermometer in the room. The temperature rarely climbs above the high
70s, and if it does, we can simply turn up the fan to full blast, and it
will cool off rather rapidly.

We used to have a similar installation without the screen door, in our
former facility. It was located under a stairwell, and instead of the
roof-mounted fan, we had (following some equipment failures) a pair of 24"
box fans exhausting into the stairwell. We called that computer closet "the
sweatbox," even after the fans (and the same thermometer we use
today) went in.

In both cases, the cost of a dedicated air condititoner would have been
prohibitive, mainly because there isn't any exterior wall to poke a "window"
unit through.

--
JHHL


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