Cold and dry

[Don]

Hi David,

My experience in small country Churches parallel's that of John Ross. The
pianos don't seem to mind the low humidity--it is just the "change" of
humidity that needs to be controlled. As temperature drops RH rises. It is
not uncommon for -30 C to exhibit 80 to 90% R.H. The killer is when that
"outside" air is warmed up to +20 C (68 F for you metrically challenged
folks).

In Churches where DC systems are installed and a "set back" thermostat is
used the results are very poor as far as pitch stability is concerned.

My experiences in the far north where humidity is ultra low suggest that
low humidity 24/7 is better for an instrument than the rise and fall of
humidity levels.

At about 2 liters per week an awfully large reservoir would be required.

At 06:34 AM 10/13/2006 -0700, you wrote:
>         The problem won’  During the winter where it’    
>I’      David Love
> davidlovepianos at comcast.net
> www.davidlovepianos.com     -----Original Message-----
> From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On
>Behalf Of John Ross
> Sent: Friday, October 13, 2006 6:09 AM
> To: Pianotech List
> Subject: Re: Cold and dry       I run across old pianos, in unheated
>country churches, they seem to hold their tune reasonably well.      They
>do have the rust problem though, but who knows how long ago it happened.   
>  I think a heater bar, just to keep the moisture down would be adequate,
>if the rust problem isn't there yet. If it is already rusty, I wouldn't
>bother, with anything.      That is, if it is just a mediocre piano anyway.
>     I would watch which mothballs, I used, as it seems to me the fumes of
>some are corrosive.      John M. Ross
> Windsor, Nova Scotia, Canada
> jrpiano at win.eastlink.ca             
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Regards,
Don Rose, B.Mus., A.M.U.S., A.MUS., R.P.T.
Non calor sed umor est qui nobis incommodat

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