<HTML><HEAD> <META charset=US-ASCII http-equiv=Content-Type content="text/html; cha= rset=US-ASCII"> <META content="MSHTML 6.00.2800.1505" name=GENERATOR></HEAD> <BODY style="FONT-SIZE: 10pt; FONT-FAMILY: Arial; BACKGROUND-COLOR: #fffff= f"> <DIV> <DIV>Mark,</DIV> <DIV> </DIV> <DIV>Just a couple ideas:</DIV> <DIV> </DIV> <DIV>1.  I'm sure you're right about the RH reaching 10%RH.  It's = my understanding that a sling psychrometer will be somewhat more accurate at= the low end (anyone who can confirm or debunk this please?).  Usi= ng such a tried and true tool doesn't hurt when making the case, either.</DI= V> <DIV> </DIV> <DIV>2.  One way to dramatically improve your situation = economically is to put half-systems in all pianos - just heater bars an= d humidistats.  It's amazing what you can do by cutting out m= ost of the effect of the high summer swings.</DIV> <DIV> </DIV> <DIV>Bill Shull</DIV> <DIV> </DIV> <DIV> In a message dated 1/13/2006 5:12:13 PM Pacific Standard Time, pi= anotech@nhpianos.com writes:</DIV> <BLOCKQUOTE style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: blue = 2px solid"><FONT face=Arial>After years of complaining about the environme= nt in the Music Building<BR>at a school that I service, there finally seems = to be some movement<BR>towards at least exploring a solution to the problem.= I have been asked<BR>to provide a range of both humidity and temperature th= at would be<BR>considered the minimum requirements for the pianos. Right now= , humidity<BR>swings between 20% and 70%, measured with my radio shack digit= al<BR>thermo/hygrometer, although I have a hard time believing that it doesn= 't<BR>drop lower than that. Temperatures in the heating season frequently<BR= >reach into the upper 70's, with a few rooms hitting well above 80F on<BR>oc= casion! I have suggested that anything outside the 30% - 60% range is<BR>bad= for the pianos, with an ideal of mid 40%'s, but I don't know how to<BR>answ= er the temperature question. Any suggestions?<BR><BR>Mark Dierauf, <BR>Conco= rd, NH<BR></FONT></BLOCKQUOTE></DIV> <DIV></DIV></BODY></HTML>