For us, in Southern California, that is not an issue - we live in the desert - low humidity already. Actually the guys who were here in the office said to leave the AC off for some of the time and give it a rest at night! If it runs constantly and you make the thermostat too cold you can burn out the compressor.

VOYAGER:
MC to FLL 11/07
MC/Dover 6/06
MARINER:
BCN / Ven 10/11
Alaska 2001|2006
Panama Canal 2003
NAV
Caribbean 11/06
Bermuda|New Eng/Canada 6/04
PG 5/05
OCEANIA
Nautica |Ist/Athens 6/07
Regatta|Baltics 6/08
Riviera 2013 Crossing -Istanbul to Miami