Humid tropical sunshine for two weeks straight. Had all the windows open and fans blowing for two weeks straight because the whole house HVAC system kicked it. New HVAC system comes this week. With two weeks straight of 60-80 degrees of temperature and around 80% humidity, how long should we seal up and dehumidify the house and let the piano set before we get it tuned? Upright Yamaha, 18 years old, two owners, played infrequently.