<html> <body> Jurgen - I can't give you specific recommendations (research required), but I would not be so quick to drop the idea of a room humidifier, especially in a basement space.  Most of the time, unless the basement is naturally dry, some type of dehumidifying process is necessary, even apart from the presence of a piano.  I'm sure there are varying quality units, as well as perfectly reliable humidistats that can be optained.  It may well be that you would have to rewire a unit to bypass the built-in sensor if you want to run it through a better grade humidity-sensing switch, but I wonder why you couldn't just use a standard (quality) appliance and adjust the setting based on whatever hygrometer is being used (also, hopefully of some quality), ignoring the nominal setting on the appliance entirely.  Am I missing something? David Skolnik At 03:01 PM 7/13/2005 -0700, you wrote: <blockquote type=cite class=cite cite="">I have a client with a 7' Kawai grand in a basement studio.  The Relative Humidity  is always on the high side (60%).  I urged him to monitor the humidity with an electronic hygrometer and to get a dehumidifier. He did this, however the controller on the dehumidifier in very inaccurate.  With the controller set at 40%, it cut out when the humidity is still above 60%.  The manufacturer told him they are all not precise.  He has searched for higher end units, but even the manufacturers of these do not guarantee the precision of their controllers. I would prefer to control the environment in the studio because it "should" be a straight forward thing to do.  I feel a Piano Life Saver System will simply always be fighting the higher humidity in the room. I have thought of using a Piano Life Saver humidistat to control a simple room de-humidifier.  Would this work?  Would he need a relay  between the humidistat and the de-humidifier? Any thoughts, and especially experiences, welcome. Jurgen Goering <a href="http://www.pianofortesupply.com">www.pianofortesupply.com</a> </blockquote></body> </html>