QUERY:YAMAHA GRANDS BUILT FOR JAPANESE MARKET

[Maxpiano@AOL.COM]

I service a couple of Yamaha grands that were sold by a dealer whom I know 
trades in gray market pianos.  My biggest problem is not with the quality of 
the pianos but the disreputable quality (read: character) of the dealer.  I 
was contacted before the purchase and advised extreme caution for reasons 
that have been aired on this thread.   The customers elected to go ahead 
anyway.  So far, no problems.  

My question is, when our humidity ranges from 70% (or even 80% plus) in 
summer to 30% with the heat on, how is the wood helped to acclimate itself to 
this range just by controlling the moisture content in the drying kiln?  
Knight used to post notice in their pianos that they were "manufactured for 
the American climate."  Just what IS the "American climate?"

Bill Maxim
South Carolina