Is condensation an issue at all here with the AC cooling it? Just curious.
I've had my AC unit blowing directly at my 3*7970 for over a year now, never had a problem, but in the summer, the AC can barely keep up... temps are getting over 80 C on hot days.
Part of air conditioning (heat exchange) works to cool the air cools by removing moisture.  Static electricity would be a bigger risk than condensation... the condensate accumulates on the coils of the A/C unit and (hopefully) is removed by some method (a drain?).
Static electricity does have a tendency to be worse in dry air and is a bigger risk factor IMHO.  I seem to notice this more in the summer months of air conditioned server rooms.  Although I am not sure an R2D2 unit such as that would cause any concern for overly dry air and static electricity.