Dean May wrote: > Be careful about thinking the a/c will keep RH down. Conditioned air coming > off the A/C evaporator coils is at near 100 % RH. If that air is blowing on > the piano, i.e., the piano is too close to a vent, then the piano is going > to pick up significant moisture, even if A/C is on full blast and the room > is cold. > > Dean Well, no. Relative humidity isn't absolute moisture content, it's temperature related. A/C exhaust is of a lower moisture content than the room air, because the cold coils condensed moisture from it as they cooled it. That's why an A/C produces water, which is diverted to an outdoor drip, or drain. Ron N
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