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dfridge

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What is the average or typical heat in btu's put out by a 3/4 full 84" rack?

My company is moving to a custom built office.  I was asked to figure out in BTU's, what kind of heat each rack would put out, or a pretty close guess, for cooling purposes.  Our 5 racks (enclosed) are 3/4 full now, with 1u servers, and a 3com switch, along with a couple of 16 disk arrays.  The booklet that came with the server says it puts out about 1372 BTU an hour.  We will probably be adding more servers later.  So, I am guessing 40, 000 btu per hour, per rack(27 servers, and switches, ups, etc.).  That just doesn't sound right, does it? I am guessing the 1372 is server at full load?  That just sounds awful high.  In 6 yrs in IT, sadly, this is the first time I have been asked this.  
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Callandor
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computerfixins

We use the 1-ton of cooling per rack in our data center...just as a generelized rule of thumb...  

The lazy admin way :)

that said; you should probaly use callandor's... o.O