Whole room humidity control better than Dampp Chaser. ( Right?)

[Andrew and Rebeca Anderson]

Greg,
A wool-felt string-cover alone will protect the 
strings against rust.  That has been well 
established by grand pianos in (ocean front) 
beach-houses with string-covers that have 
brand-new looking interiors after decades as 
compared to their unprotected neighbors.  Wool 
has the natural capacity to buffer humidity and 
any sort of cover probably prevents 
condensation.  This is the first accessory I recommend.

Add a DC system and undercover and you will then 
reduce the sound-board oscillation to negligible 
resulting in tunings that last until your next 
service.  You get to do a concert level tuning 
each time you return to the instrument.

I have two Sauters on the floor here.  They are 
fine pianos which are much more stabile than 
average.  One has a DC with undercover and the 
other has DC with undercover and 
string-cover.  The one without the string-cover 
is noticeably (to me) affected by the 
weather.  The other one hasn't been tuned in a 
coon's age and still has a solid tuning on it.

YMMV
Andrew Anderson

At 07:48 AM 2/18/2008, you wrote:
>Patrick,
>I completely agree. 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.
>
>Greg Newell
>Greg's Piano Forté
>www.gregspianoforte.com
>216-226-3791 (office)
>216-470-8634 (mobile)
>
>From: pianotech-bounces at ptg.org 
>[mailto:pianotech-bounces at ptg.org] On Behalf Of J Patrick Draine
>Sent: Monday, February 18, 2008 7:59 AM
>To: Pianotech List
>Subject: Re: Whole room humidity control better than Dampp Chaser. ( Right?)
>
>Greg,
>My (anecdotal) observation is that a standard DC 
>installation on a grand will not promote 
>oxidation of steel strings and copper windings, 
>while usage of a room humidifier often will 
>result in rapid accumulation of rust & dull 
>brown copper windings. If customers are inclined 
>to use a room humidifier I urge them to keep the 
>lid closed when not in use. Customers sometimes 
>blast the mist right into the piano -- sigh -- 
>they think they're "doing the right thing."
>
>Patrick Draine
>
>On Feb 18, 2008 12:36 AM, Greg Newell 
><<mailto:gnewell at ameritech.net>gnewell at ameritech.net> wrote:
>
>  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.

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