Hi Julien,

I would like to do free air cooling for some small datacenter. Idea is to use cold air from outside to cool the servers room in order to limit AC power when possible.

I like that idea getting rid / reducing the amount of chillers.

I have sensors inside servers room and outdoor to collect temperature and humidity. I calculate both dew point and try to estimate thermal bridge value.

Perfect!

Has anyone already worked on this can give me some clues?

Harald (harald.rossol@erecon.de) from erecon did already something similar in the past to heat up it's office (during winter ;-) and cool down its servers. He has a nice and successful approach doing this. I met him on a datacenter event.

cCheers Thomas