🚀 go-pugleaf

jypai@ccnext.csie.nctu.edu.tw writes
> I'm one of the administrators of our computet center.
> We have a hostful of workstations, including NeXT, Sun, and IRIS.
> Recently we have a debate on this topic.
> My point is that raise the temperature up to 25 degree C (72 F) is  
good for
> 1. human body health
> 2. saving energy.

	I started to flame here. Then noticed where this was from.  I  
don't live in a climate the requires air conditioning...
	In Canada and the US most homes and businesses are overheated.   
One study I read said 65 F for jobs requiring manual dexterity. 60 F  
for brain work. 50-55 for physical labour, and < 50 for sleeping.

> 
> Their point is simple:
> Cold (around 22 C (67 F) or lower) is good for machines.
> 
> I know that workstations need special care.
> There's a specification table saying its (possible) working  
temperature range.
> But I need to know what is best for them, and what is reasonable.

	We try to keep our machine room at 18 C, Workstation rooms at  
20 C.  
	Colder is better to a point.  Watch the humidity.  Don't want  
condensation on the circuit boards.  Most lcd's start having trouble at  
-20 C or so, and some electrical components stop at -40.

	More important than the temperature though is the change in  
temperature.  Whatever temp you have, keep it the same.

	For hard drives the MTBF drops by 50% for each 10 C up in  
temperature.  Can't say if the reverse is true.