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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