<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=Content-Type content="text/html; charset=iso-8859-1"> <META content="MSHTML 6.00.2900.3132" name=GENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=#ffffff> <DIV><EM>".......heater bars and a hygrometer to control them."</EM></DIV> <DIV><FONT face=Arial size=2><EM></EM></FONT> </DIV> <DIV><FONT face=Arial>Hygrometer will only indicate RH, not control anything. You need a humidistat.   <FONT size=5><STRONG>;-)</STRONG></FONT></FONT></DIV> <DIV><FONT face=Arial></FONT> </DIV> <DIV><FONT face=Arial>Terry Farrell</FONT></DIV> <BLOCKQUOTE style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px"> <DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>Do you have a hygrometer?  Giving recommendations without measurements is like shooting in the dark.  Rather ineffective except for certain movie stars... <BR><BR>It sounds like the best fit for your needs (provided humidity is that high consistently) would be DamppChaser's dehumidifier-only systems that contain heater bars and a hygrometer to control them.  A heater bar without control is piano damage happening every long period you leave it plugged in.  Undercovers and stringcovers would work together to further protect the piano and make the system more stabile.  <BR><BR>A full system would require maintenance in the form of adding water and if the actual measured humidity is lower you may want to go that way.  You would want to use a beeper system as no-one (not even residential customers) will bother to maintain water levels without aural stimulation.  In an institutional setting that would require some education as some ignoramus take-charge-types will just unplug the system rather then deal with it.<BR><BR>Good Luck,<BR>Andrew Anderson, Artisan Piano<BR></BLOCKQUOTE></BODY></HTML>