[pianotech] Protection from underfloor heating

[Encore Pianos]

Run the fan and you have a FORCED HOT AIR system that dries out the wood far
more efficiently and quickly than simply allowing the heat to rise on its
own.  

Will Truitt 

-----Original Message-----
From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of Jim Ialeggio
Sent: Tuesday, December 11, 2012 10:42 AM
To: pianotech at ptg.org
Subject: [pianotech] Protection from underfloor heating

Regarding a protocl to try and see whats happening in and around the piano,
I think measuring temp as a single quantity, as has been suggested, would
not be useful. Rather, RH measured right up at the surface of the piano
(what surfaces...there are so many....start with
soundboard?) and air flow across that surface would be required. 
Further, my hunch, though I don't know how to physically run this test, is
that the important Rh is contained in a layer of air that is actually
extremely close, unto even a molecular layer of air right at the surface of
the wood. That is why fans are required for drying.

Keep in mind, air flow is a huge variable in this whole system. For example,
in our hot boxes, raise the temp but dont run the fan, and it will take much
much longer for the wood to equilibrate. Or take your laundry and run it in
the dryer with heat only, no fan. Come back 2 days later and you will still
be enjoying the luxurious feel of warm wet underwear.

Jim Ialeggio

-- 
Jim Ialeggio	
jim at grandpianosolutions.com
978 425-9026
Shirley Center, MA