[pianotech] Clarification Question: i'll take a pass

[Rob McCall]

Your reduction in total moisture was more than just the 10% you  
mentioned, as warm air can hold considerably more water per cubic foot  
of air than cold air can.  If you have the piano in 15 deg F, you can  
approach 100% humidity and still have very little total moisture in  
the air.

A more accurate measure of how much moisture is removed might be found  
by running the AC at a temperature equal to the existing temperature  
and then measure the RH after awhile.  I'm curious what percentage  
you'd have then...

Regards,

Rob McCall
Murrieta, CA

On Aug 28, 2009, at 06:46 , Terry Farrell wrote:

> A modern AC unit DOES remove water from the air. My shop will  
> usually go up to about 50% RH if I'm not in there for a couple days  
> - but then if I run my AC unit for a few house, the RH will drop to  
> 40% or lower if I run it long enough.
>
> Terry Farrell