It would actually have to cool the soundboard down some for the soundboard to increase its MC - the air would have to really directly blow on it for the majority of the time. BUT, for sure, I totally agree with you that a piano in line of air flow from an AC duct is a disaster waiting to happen - just like a heat duct. Terry Farrell On Aug 30, 2009, at 9:11 AM, Andrew Anderson wrote: > Water does not have to condense (greater then 100% Rh) out of air to > increase MC in wood, it simply has to be available in the air, > greater Rh = greater availability. We don't like to see pianos > sitting in 60% Rh without a stringcover at least. What about 80 to > 90% Rh coming out of a duct and blowing directly onto the piano? > > Andrew Anderson > > On Aug 30, 2009, at 4:22 AM, Terry Farrell wrote: > >> How is cool air blowing out an air duct going to "give up its >> water"? If the air was at 100% RH at the coils, it will be at 99.9% >> RH or lower as it exits the vent - how is it going to loose any >> more water? >> >> Terry Farrell >> >> On Aug 29, 2009, at 10:01 PM, Andrew Anderson wrote: >> >>> SNIP >> >>> Cold air straight out of a duct (short ones make this obvious) has >>> a high relative humidity and can easily give up its water. >>> >>> Andrew Anderson >> >
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