<HTML><BODY style="word-wrap: break-word; -khtml-nbsp-mode: space; -khtml-line-break: after-white-space; ">Hi Roger,<DIV><SPAN class="Apple-tab-span" style="white-space:pre"> </SPAN>Thanks for sharing this. Do you have any info on the ambient RH during this period? Were these grands using DRY humidistats?<BR><DIV> <SPAN class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><SPAN class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><DIV>Regards,</DIV><DIV>Fred Sturm</DIV><DIV>University of New Mexico</DIV><DIV><A href="mailto:fssturm@unm.edu">fssturm@unm.edu</A></DIV><DIV><BR class="khtml-block-placeholder"></DIV><BR class="Apple-interchange-newline"></SPAN></SPAN> </DIV><BR><DIV><DIV>On May 20, 2006, at 5:57 PM, Roger Jolly wrote:</DIV><BR class="Apple-interchange-newline"><BLOCKQUOTE type="cite"> <FONT size="3">Hi Stan. <BR> I think the results of the data loggers show a lot. This graph is a sample of two closely matched C3 grands in a teaching studio at the University. The pianos sit side by side . Both pianos had calibrated data loggers fixed in identical positions on the centre beam. <BR> Humidity and temperature measurements were made every 15mins 24/7.<BR> One piano with cover, one without.<BR> The covered piano had the damp chaser unplugged for a few days.<BR> Tuning changes were also made on a weekly basis, but I will share that data at a later date.<BR> You will note that the temperature of the covered piano is one to two degrees higher because of reduced circulation, but the humidity is on average 10% higher.<BR> My research has shown that pads should be changed every 60days for maximum efficiency.<BR><BR> Just some teaser information.<BR><BR> I will get around to collating and publishing more extensive data later.<BR><BR> Point. These bottom covers work, now we have to collectively find better ways to install them.<BR><BR> Regards Roger<BR><BR> <BR> </FONT><SPAN><DIV><graph.jpg></DIV></SPAN></BLOCKQUOTE></DIV><BR></DIV></BODY></HTML>