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Industry recommendation for comms room temperature range

We are placing some equipment in a 3rd party telecoms POP. A survey revealed what we thought was a rather high temperature at 30 degrees centigrade. The air conditioning seems to have failed.
Ambient temperature about 6 degrees.

Is there an industry standard which relates to comms rooms which I can refer to?

We intend placing switches routers DSLAMS etc in the POP.
The switch has a range in its specification up to 40 degrees but I am concerned the temperature in the summer could go higher and get close to that if the problem is not resolved.

The maintenance engineer who visited (we reported it as a fault) said the temperature is not ususual and not something to be concerned about....

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rutlandict
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rutlandict
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1 Solution
 
aleghartCommented:
30C is not terrible for switching equipment.  There are debates about reduced equipment life for hard drives and tape media.  But the most problems come from temperature and humidity variation, not the actual reading itself.

I do agree, however, that if the outside temp is 6C with internal at 30C, you will definitely be seeing problems in the summer time.

Confirm with the building engineer if the HVAC is separate for that room.  If they are using house air, then you are pulling heated air in during the winter months, not cool air.  So, you may be fine in the summer time, when house air is switched to cool.

Drop a monitor in the room for 24 hrs.  Let it record temp & humidity, min & max.  You can get one fairly cheaply for around $40.
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kdearingCommented:
In my experience, you will see reduced MTBF at constant that temperature.
But the real problem may be the humidity.
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aleghartCommented:
I've never enough hard drives from the same manufacturing line, nor the actual run-time stats to calculate MTBF.

Also, you'd need two environments, one @30C and one @22C to make the comparison.

With a general MTBF of 50,000 hours, you're looking at 5.7 years.

A desktop-grade 7200.11 drive from Seagate has a 5-year warranty and 750,000 hours MTBF (85+years!).

I don't plan on any of the servers to run in production for that long, much less the hard drives.

You need to look at the annualized failure rate (.34% for this drive) instead.  The MTBF only helps if it is short, and you can plan PM (preventive maintenance) around it.
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jjmartineziiiCommented:
I would say 30% humidity at around 21 degrees C
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jjmartineziiiCommented:
Also, here is a datasheet from a company called spin wave systems: http://www.spinwavesystems.com/DataSheets/Data%20Center%20Monitoring.pdf
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aleghartCommented:
FWIW, ours is set at 74F @ 40%RH.  In Los Angeles, it takes some work to keep the RH up that high.  We see <20% ambient on a regular basis.

The house air is from cooling towers, so we don't see the additional drying effect of smaller air conditioners.  The in-room HVAC has it's own humidification system.

Using standard commercial HVAC is more cost efficient for us.  We don't have that cold-air buffer to buy extra time when the AC dies...but buy staying at 74F instead of 68F, we are not overrunning the units, which would cause freeze up or premature failure.

The 58F blast of air coming from the ducts are plenty cold on my bald head...no need to introduce thermal shock at the servers' intake.  :)
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rutlandictAuthor Commented:
I'll allocate points to those responses above soon if nobody thinks there is a recognised industry standard available. e.g. in the way Cisco have a standard for minimum acceptable packet loss which ISPs often refer to.
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kdearingCommented:
According to Cisco -
"Design conditions should be 72 to 75°F (22 to 24°C) and 35 to 50 percent relative humidity."
http://www.cisco.com/en/US/solutions/ns708/networking_solutions_products_genericcontent0900aecd806fd327.pdf

Also note:
"This incremental threat of hardware failure can be quantified using the Arrhenius equation, which states that for every 10 degrees Celsius that a piece of equipment operates nominally above specification, the lifespan of that component is essentially halved."
http://www.cisco.com/en/US/solutions/ns708/networking_solutions_products_genericcontent0900aecd806fd32e.pdf
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rutlandictAuthor Commented:
There is a European standard apparently (at least that is what BT operate by)
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rutlandictAuthor Commented:
ETSI EN 300 019
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