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
This PTG archive page provided courtesy of Moy Piano Service, LLC