Re: rack power question

[Petri Helenius <petri () helenius fi>]

Paul Vixie wrote:
> this is a strict business decision involving sustainability and TCO.  if it
> takes one watt of mechanical to transfer heat away from every watt delivered,
> whereas ambient air with good-enough filtration will let one watt of roof fan
> transfer the heat away from five delivered watts, then it's a no-brainer.  but
> as i said at the outset, i am vexed at the moment by the filtration costs.
>   
Have you made any calculations if geo-cooling makes sense in your region 
to fill in the hottest summer months or is drilling just too expensive 
for the return?

Pete