I have heard the complaint before that Dampp-Chaser systems must be ineffective because they only affect the soundboard from one side. Even so, they actually work, which fact should outweigh purely theoretical considerations. Areas where continuous room-climate control is impossible should include most private dwellings in addition to churches and auditoriums. A lot of people can't or won't pay to have even a Dampp-Chaser system installed in pianos, much less complete home humidity control systems. Finally, Dampp-Chaser systems which affect both sides of the soundboard are available for vertical pianos. Bob Anderson Tucson, AZ
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