Hi David, >Dear Don, > >What is the compensation formula? (for humidity levels) When outside air comes into a building for example in Winter time, the temperature of the air is raised. This causes the Relative Humidity to drop dramatically. The formula which should be available from your local weather office will allow you to use the ir long term records of high and low humidity levels to calculate the true indoor value, assuming you know the indoor temperature. I wrote a paper on this in 1979 and havn't used the formula since. For Steinway humidity recommendations, I suggest you contact them. I believe they become uncomfortable about anything lower than 38%. Regards Don Rose drose@saskmaple.net
This PTG archive page provided courtesy of Moy Piano Service, LLC