[josaka]

I think it's because it's dry. Facilities guy in the semi plant I used to work in told me that their highest energy usage was when it was humid, not when it's hot or cold. Said the energy cost to cool the humid air to pull out water and then heat it back up to the fab's target temp was pretty massive.

[dv_dt]

seems like you should be able to dump part of the waste heat back into the output air after the cooling stage.