On Sunday, Aug 31, 2003, at 18:08 US/Eastern, Eddie wrote:
- A fan left on all the time does 5 things - it passes air, it passes dust, it collects dust, it wears it's bearings and brushes, and it uses electricity. A fan that is on only when the equipment is used
Good points you make. However, most, if not all, fans used in computers do not have brushes.
One trade off to consider in energy savings is the decreased life of the hard drive when spinning up and down. If considering this for environmental reasons, consider if replacing the hard drive sooner uses more net power than leaving it on. Does it take more power to build a hard drive (the pro-rated amount due to lesser MTBF), than to run a hard drive for a year (for instance)? How about emissions from more shipments of parts? Inrush current from powering up from whatever reduced power mode is used? Lost productivity waiting for the machine to boot up?
I suppose the definitive answer is there is no definitive answer.
Regards, JJ
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