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<DIV><FONT face=Arial>I disagree almost completely. If the piano lid is left
open, yes the DC unit would likely have little ability to deter rust forming on
strings. But if the lid is kept closed, and of course, better yet, if a string
cover is used, and, of course, better still yet, if a nice thick quilted full
piano cover is used (that means placed on the piano!), the DC unit will indeed
very effectively deter the formation of rust on strings.</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>If one were trying to add humidity to the environment
on top of the soundboard, indeed, a DC humidifier placed on the bottom of
the soundboard would have little effect. That is because the
humidifier physically adds water molecules to the air, and if there is a
barrier (soundboard panel) to the migration of those molecules, then the
water vapor will stay in the environment of their origin (below the
soundboard). </FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>However, the holes, or lack thereof, in the
soundboard have little to do with the transmission of heat. The
dehumidifier portion of the DC system adds heat (raises the energy level of the
air) to the environment below the soundboard panel. Heat energy can and
does transmit through the panel and heats the air above the soundboard. The air
below the soundboard warms, the soundboard warms and then the air above the
soundboard warms. The warm air from below the soundboard does not have to mix
with the air above the soundboard for the temperature above the soundboard to
warm. </FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>In fact, if the piano could be perfectly insulated from
the room environement, the temperature above the soundboard would be equal to
the temperature below the soundboard after a period of system equalization. Of
course that won't happen, because a piano will not be perfectly insulated from
the room environment, but a good string cover or especially a good blanket
should get you most of the way there.</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>As long as that heat above the soundboard can be retained
(close lid, string blanket, whole piano cover), the environment of the strings
will be at a higher temperature and thus a lower relative humidity than it would
without the DC system. And thus the formation of rust will be
deterred.</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>Terry Farrell</FONT></DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
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size=3></FONT> </DIV>
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<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'">SNIP
My post, however, was dealing with the prevention of oxidation and/or rust not
the promotion of it. A DC unit in a grand won’t do much to prevent it. One
could argue that the string cover will retain some of the DC unit’s effects
but it seems to me that little is afforded here since the only pass through
from the underside of the soundboard to the top side are through the nose bolt
holes. I doubt that the amount of air passing through these holes in the board
are enough to effect much of a change topside.<o:p></o:p></SPAN></P>
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<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'">Greg
Newell</SPAN></P></DIV></BLOCKQUOTE></BODY></HTML>