<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML xmlns="http://www.w3.org/TR/REC-html40" xmlns:v = "urn:schemas-microsoft-com:vml" xmlns:o = "urn:schemas-microsoft-com:office:office" xmlns:w = "urn:schemas-microsoft-com:office:word" xmlns:m = "http://schemas.microsoft.com/office/2004/12/omml"><HEAD> <META http-equiv=Content-Type content="text/html; charset=iso-8859-1"> <META content="MSHTML 6.00.6000.16608" name=GENERATOR> <STYLE>@font-face { font-family: Calibri; } @font-face { font-family: Tahoma; } @page Section1 {size: 8.5in 11.0in; margin: 1.0in 1.0in 1.0in 1.0in; } P.MsoNormal { FONT-SIZE: 12pt; MARGIN: 0in 0in 0pt; FONT-FAMILY: "Times New Roman","serif" } LI.MsoNormal { FONT-SIZE: 12pt; MARGIN: 0in 0in 0pt; FONT-FAMILY: "Times New Roman","serif" } DIV.MsoNormal { FONT-SIZE: 12pt; MARGIN: 0in 0in 0pt; FONT-FAMILY: "Times New Roman","serif" } A:link { COLOR: blue; TEXT-DECORATION: underline; mso-style-priority: 99 } SPAN.MsoHyperlink { COLOR: blue; TEXT-DECORATION: underline; mso-style-priority: 99 } A:visited { COLOR: purple; TEXT-DECORATION: underline; mso-style-priority: 99 } SPAN.MsoHyperlinkFollowed { COLOR: purple; TEXT-DECORATION: underline; mso-style-priority: 99 } SPAN.EmailStyle17 { COLOR: #1f497d; FONT-FAMILY: "Calibri","sans-serif"; mso-style-type: personal-reply } MsoChpDefault { FONT-SIZE: 10pt; mso-style-type: export-only } DIV.Section1 { page: Section1 } </STYLE> </HEAD> <BODY lang=EN-US vLink=purple link=blue bgColor=#d8d0c8> <DIV><FONT face=Arial>Cy, the DC unit can't physically put out enough moisture to control the humidity a room, the action or the pin block. If it did, I wouldn't have read 15% humidity in the room when I tuned the piano. As I wrote before, after 6 week the humidity in the room was up to 40% and the pinblock was back to normal.</FONT></DIV> <DIV><FONT face=Arial></FONT> </DIV> <DIV><FONT face=Arial>A church is another story. Congregation enters, humidity goes sky high. Congregation departs humidity drops. That is the one place I *would* use a DC unit. I would also add a string and undercover. That's the only way you have some control in a church of keeping a piano in tune. You then just hope for the best for the action and pinblock.</FONT></DIV> <DIV><FONT face=Arial></FONT> </DIV> <DIV><FONT face=Arial>Al Guecia</FONT></DIV> <BLOCKQUOTE dir=ltr 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> <DIV style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B> <A title=cy@shusterpiano.com href="mailto:cy@shusterpiano.com">Cy Shuster</A> </DIV> <DIV style="FONT: 10pt arial"><B>To:</B> <A title=pianotech@ptg.org href="mailto:pianotech@ptg.org">Pianotech List</A> </DIV> <DIV style="FONT: 10pt arial"><B>Sent:</B> Monday, February 18, 2008 4:39 AM</DIV> <DIV style="FONT: 10pt arial"><B>Subject:</B> Re: Whole room humidity control better than Dampp Chaser. ( Right?)</DIV> <DIV><BR></DIV> <DIV><FONT size=2>What is the difference between a DC humidifier in a piano, and a room humidifier sitting even farther away from the action cavity?</FONT></DIV> <DIV><FONT size=2></FONT> </DIV> <DIV><FONT size=2>If a gallon of water a week disappears into the air, it doesn't matter whether it's from a box sitting on the floor or one hanging under the piano.  Humid air from a DC gets into the action cavity the same way dry air gets in there without a DC.</FONT></DIV> <DIV><FONT size=2></FONT> </DIV> <DIV><FONT size=2>Sure, whole room humidity control is great, and there are all kinds of special situations (like the church I had that was built *over* a stream), but it's inconsistent to argue that DC moisture can't enter the action cavity, but humid air from a ceiling vent can.</FONT></DIV> <DIV><FONT size=2></FONT> </DIV> <DIV><FONT size=2>--Cy--</FONT></DIV> <DIV><FONT size=2>ABQ, NM</FONT></DIV> <BLOCKQUOTE dir=ltr 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> <DIV style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B> <A title=gnewell@ameritech.net href="mailto:gnewell@ameritech.net">Greg Newell</A> </DIV> <DIV style="FONT: 10pt arial"><B>To:</B> <A title=pianotech@ptg.org href="mailto:pianotech@ptg.org">'Pianotech List'</A> </DIV> <DIV style="FONT: 10pt arial"><B>Sent:</B> Sunday, February 17, 2008 10:36 PM</DIV> <DIV style="FONT: 10pt arial"><B>Subject:</B> RE: Whole room humidity control better than Dampp Chaser. ( Right?)</DIV> <DIV><BR></DIV> <DIV class=Section1> <P class=MsoNormal><SPAN style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'">Al,<o:p></o:p></SPAN></P> <P class=MsoNormal><SPAN style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'">                I agree that DC units do not address the pin block in a grand piano. Have you also noticed that the brochure seems to suggest that it controls humidity in the action cavity as well? I believe that it’s even a bit of a stretch to claim that it helps to prevent rusty strings in a grand as the pictures would seems to indicate. Perhaps that’s different with string covers but that’s not stated. I wish the pictures would be re-taken showing upright keys, actions, strings and pin block drawings. It sure would save a lot of time I spend in educating my customers.<o:p></o:p></SPAN></P> <P class=MsoNormal><SPAN style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'"><o:p> </o:p></SPAN></P> <DIV> <P class=MsoNormal><SPAN style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'">Greg Newell<o:p></o:p></SPAN></P> <P class=MsoNormal><SPAN style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'">Greg's Piano Forté<o:p></o:p></SPAN></P> <P class=MsoNormal><SPAN style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'">www.gregspianoforte.com<o:p></o:p></SPAN></P> <P class=MsoNormal><SPAN style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'">216-226-3791 (office)<o:p></o:p></SPAN></P> <P class=MsoNormal><SPAN style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'">216-470-8634 (mobile)<o:p></o:p></SPAN></P></DIV> <P class=MsoNormal><SPAN style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'"><o:p> </o:p></SPAN></P> <DIV> <DIV style="BORDER-RIGHT: medium none; PADDING-RIGHT: 0in; BORDER-TOP: #b5c4df 1pt solid; PADDING-LEFT: 0in; PADDING-BOTTOM: 0in; BORDER-LEFT: medium none; PADDING-TOP: 3pt; BORDER-BOTTOM: medium none"><STRONG><FONT face=Tahoma size=2></FONT></STRONG> </DIV></DIV></DIV></BLOCKQUOTE></BLOCKQUOTE></BODY></HTML>