<!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 6.00.2800.1458" name=GENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=#ffffff> <DIV><FONT face="Times New Roman">Hi Don,</FONT></DIV> <DIV><FONT face="Times New Roman"></FONT> </DIV> <DIV>With respect, even when and upright is against a wall back covers improve<BR>the response of DamppChaser systems. That might not be so in = a more<BR>forgiving climate. But where I live is not forgiving *at all*. = (4% to 84%<BR>yearly)<BR><BR><FONT face="Times New Roman">That's even more = than here, where we bottom out at about 12-15% inside (top range the same as = yours).  Everything we do helps, and that cover definitely helps.  One thing = we always do for our own clients is use two dehumidifiers in uprights, even = small ones.  The second one goes above the keys, anywhere from 8-25 watts = depending on various factors.  That gives us incredible stability.</FONT></DIV> <DIV> </DIV> <DIV><FONT face="Times New Roman">I always enjoy your knowledgeable = posts.  </FONT></DIV> <DIV><FONT face="Times New Roman"></FONT> </DIV> <DIV><FONT face="Times New Roman">Best regards,</FONT></DIV> <DIV><FONT face="Times New Roman">Ruth</FONT></DIV></BODY></HTML>