<html> <body> From the DampChaser website, under Major Manufacturers Recommendations: <div align="right"><img src="cid:6.0.1.1.2.20070215150928.00d03eb0@pop.suddenlinkmail.com.0" width=175 height=25 alt="d07f75.jpg"> </div> "...Yamaha fully endorses the use of the system with Yamaha pianos in areas that are subject to extremes in humidity.  Without such a system, it is very difficult to control the humidity around the piano." Of course this guy (dealer) will probably say that DampChaser just put that on their website without Yamaha's permission.  Call Yamaha tech support and see if you can get something in writing from them to pass on to the customer. Bill Jeffreys Tyler, TX   At 02:24 PM 2/15/2007, you wrote: <blockquote type=cite class=cite cite>Hello All: Still on the Yamaha grand at issue, the one with the noisy strings. Now it turns out that the Yamaha dealer is telling my customer that installing a Damppchaser system on the piano will ruin it, and should never be done under any circumstances. Anyone know what Yamaha's official policy is on Dampp-chaser usage? Thanks again, Patrick C. Poulson Registered Piano Technician Piano Technicians Guild</blockquote></body> </html>