http://www.facebook.com/video/video.php?v=1231472541731
I had an HVAC problem I was asked to trouble shoot. Thermal Video helped again. Many data floors have stratification issues .The air can be stagnet because it can't move do to static pressure under the floor plenum. If you have some HVAC knowledge thermal Infrared can help trouble shoot in minutes.
The unit is a liebert down flow.