DC

[Jonathan Finger]

-----Original Message-----
From: pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] On
Behalf Of Don
Sent: Thursday, February 13, 2003 12:54 AM
To: Pianotech
Subject: RE: DC

Hi Jonathan,

What is the lowest out door temperature that occurs? If it causes the
wall
cavities in homes to drop below the dew point such a unit would flirt
with
serious home damage. It also does not address the high end of the
spectrum
for humidity.

If you look here I think you will find your basic premise that humidity
is
fairly even will be quite quite shattered.

http://ccc.atmos.colostate.edu/~coagmet/rawdata_docs.php

I charge about $300 US for a full upgright install--which saves the
client
3 tunings per year.

At 10:09 PM 2/12/2003 -0700, you wrote:


Don, my premise is that the humidity is not even.  If I thought it were
even, there would be no need for climate control.  

I haven't seen problems with wall cavities getting too cold.  I'm
assuming you're referring to the temperature in the walls approaching,
or reaching dew point, and then causing condensation.  This isn't a
problem here, or at least not with the type of climate control I'm
talking about.  

I tried to look at the URL that you posted, but it simply took me to a
page explaining raw data.  The readings should be somewhat different at
CSU I would think, but not significantly different from here.  I suspect
that it would show fairly wide swings between summer and winter.  I know
for a fact that these swings happen, because I measure them.  

I can get a customer's piano stable to the point that it isn't dropping
more than a few cents in 6 months.  Furthermore, the unisons are still
tight, and octaves clean over the breaks.  This tells me that the piano
has remained fairly stable.

I just seems more logical to me to try to affect everything around the
piano, rather than try to create a bubble right around it.  Since there
is no need for dehumidification here, I am talking only about the
humidification properties of both units.  In certain climates, one is
clearly able to do a better job.

Jonathan Finger RPT