At the Scottsdale NANOG Spring 2001 I asked for volunteers to install
temperature and humidity data loggers in their colocation facilities.
I wanted to determine what are "typical" colocation enviromental
conditions. I was tired of people asserting all sorts of numbers
as the required conditions for a colocation facility.
Although I haven't received all the data loggers back (if you have
one I still want it back), I have posted the data I collected on
my personal web site.
The sample is too small to be useful, but it is data.