Room Dehumidifiers vs. Dampp-Chaser

[Gayle Mair]

To Richard Moody,

The Dampp-Chaser dehumidifier reduces the relative humidity under a grand
piano sound board in an area less than the size of the sound board, but
allow me to explain:  The warm air created by the dehumidifier rod carries
the reduced humidity air up to the sound board.  It picks up moisture from
the sound board, cools and becomes heavier than the surrounding air so it
falls to a point below the piano and hits the floor or is carried away by
air currents within the room.  The moisture content in the sound board area
of the reduced relative humidity area equalizes not only through the sound
board but across the sound board.  The dehumidification effect is enhanced
by producing lower relative humidities through higher temperatures and by
adding dehumidifiers across the area under the sound board.  This is an
ongoing process, 24 hours per day, 365 days per year if necessary.  

This is a simplified version of the moisture content reducing mechanics of
Dampp-Chaser dehumidifiers.

----------
> From: Richard Moody  <remoody@easnetsd.com>
> To: pianotech@ptg.org
> Subject: Re: Room Dehumidifiers vs. Dampp-Chaser
> Date: Friday, August 22, 1997 4:02 AM
> 
> I still have not figured out how a Dampchaser can keep a zone of
> humidity different from the room the piano is in more than three
> inches away from the heat bar, or the water tank.  
> 
> Richard Moody
> ps  No I havn't measured the humidity 2 inches 3 inches 14 inches 25
> inches away from a damp chaser.    Nor compared the values above and
> below the soundboard.  But some one has or is gonna ??
> 
> 
> .  .  .  .  .  .  .  .  .         .  . .....   .   .  .     .     .  
> ...   ..   .  .  . .  . . .... . . . . .. .  . . .  . . .
> .> > my own personal experience, the pianos that have a complete D-C
> System
> > hold
> > > tunings much better.  I don't like to change pitch up and down
> back to
> > > A-440 every 6 months for my regular customers because it puts
> unnecessary
> > > wear and tear on the pinblock.  A D-C system helps the piano stay
> at
> > pitch
> > > much better.
> > > 
> > > I hope this helps!  Why not contact Dampp-Chaser Electronics for
> their
> > > newest packet of information?
> > > 
> > > Sincerely,
> > > 
> > > 
> > > David A. Vanderhoofven, RPT
> > > Joplin, Missouri, USA        
> > > e-mail:  dkvander@clandjop.com
> > > 
> > > web page:  http://www.clandjop.com/~dkvander/
> > > #pianotech page:  http://www.clandjop.com/~dkvander/ircpiano.html
> > >