thanks a lot for your help. Our planned fresh-air cooled rooms will be used both by our own equipment and by customers. But most of them are ISPs and ASPs, so they are open for non conventional solutions (for regular business customers we have regular rooms with CRACs).
I've heard with interest of your presentation during 2007 Gartner Data Center Summit. Now, I'm seeking a real technical solution for fresh-air cooled DC (facility of 2000-3000 m sq) - designs, suppliers etc.
But for my technical department the main questions are: Is it possible not to use air condition? In case of failure of "fresh-air cooling" idea, will we have to add normal coolres later with more effort and cost?
Maybe a reference visit in one of fresh-air cooled DC would help to convince our engineers to accept this way of thinking about Data Centres?