School piano

[DGPEAKE@AOL.COM]

Dear Friends and Collegues,

There is Kawai UST-8 Studio that I tune on a regular basis at a local 
highschool.  The problem is that is very unstable.  Last September I found it 
to be 30 cents sharp. It seemed very damp in the choir room.  I checked the 
humidity and it was between 40 and 50%. The floor is cement with no carpeting 
(it is a new school and I think they saved the carpet money for a better 
football field). I went ahead and installed a dehumidifier and humidistat.  
Then today I tuned it and found it 20 cents flat. The humidistat was not on. 
It is colder and the heat is on, so I believe it is now dryer in the room. I 
tune a lot of UST-8's in schools and never found such instability. So here 
are the questions:

    1. Should I install a humidifier to the system?
    2. Would a carpet underneath the piano help, or carpet the whole room?
    3. Do you have any other suggestions?

Thanx in advance

Dave Peake, RPT
Portland Chapter
Oregon City, OR