Thanks all, for the responses.  Ron L, I think you may be quite near the piano in question!  It's in New Richmond, WI, and I only found two Ron Lindstrom's in all Wisconsin!  Anyhow, the work was about to begin when I got the phone call this a.m.  It sounded as tho' they'd been fretting about the issue for some time... and waited until the last 30 minutes to inquire of anyone who MIGHT have a clue. (It's like the people that pay $200 to move a free (junker) piano before they ask if it's salvageable.) I wound up recommending that they not heat under the piano (which is a console). It is a music studio, and they have placed it for optimal acoustics, so it will not matter that they are committing to the one location. If they ever should eventually vacate, the unheated portion of the floor will not be very large since it's a console.  I also recommended a Dampp-Chaser, as I usually do for those pianos where stability is a bigger issue than the typical home. (In a home, I recommend at least a room or whole-house humidification, which helps the residents' health as much as the piano's.) Thanks again, Paul <div>On 2/2/07, Dean May <<a href="mailto:deanmay@pianorebuilders.com">deanmay@pianorebuilders.com</a>> wrote:<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> <div bgcolor="white" link="blue" vlink="purple" lang="EN-US"> <div> I would think an area rug under the piano and a DampChaser undercover should negate any effects of the heat off the floor. The coils won't be making the floor hot, just slightly warm. If they avoid the area under the piano, then they are pretty much stuck with that location for the piano.   <div> Dean Dean May             cell 812.239.3359 PianoRebuilders.com   812.235.5272 Terre Haute IN  47802 </div> <div> <div style="text-align: center;" align="center"> <hr align="center" size="2" width="100%"> </div> From: <a href="mailto:pianotech-bounces@ptg.org" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">pianotech-bounces@ptg.org</a> [mailto:<a href="mailto:pianotech-bounces@ptg.org" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)"> pianotech-bounces@ptg.org</a>] On Behalf Of Farrell Sent: Friday, February 02, 2007 12:33 PM To: Pianotech List Subject: Re: In-floor Radiant Heating </div><div>   <div> I am not an expert with radiant heat. However, the more consistent you can keep the environment surrounding the piano, the better. I agree with you that it would be better to leave the area of the piano free of the radiant heat source. </div> <div>   </div> <div> I should think that a grand piano without a full DC (with bottom cover) installation placed over a radiant heat source would likely have a rather short lifespan. </div> <div>   </div> <div> Terry Farrell </div> <blockquote style="border-style: none none none solid; border-color: -moz-use-text-color -moz-use-text-color -moz-use-text-color black; border-width: medium medium medium 1.5pt; margin: 5pt 0in 5pt 3.75pt; padding: 0in 0in 0in 4pt;"> <div> ----- Original Message ----- </div> <div>   </div> I just had a phone call from a music studio that is installing electric coil radiant heating in the floor. She wondered about the advisability of putting the coils directly under where the piano will be placed.  I'm thinking it may be better to avoid it, but I should defer to the greater expertise of this list. For some reason, although this question has been bugging them for some time, they only now decided to call me to ask... now that the workers are there putting the tiles in the floor... so time is of the essence.  If I don't get a definitive response from the many wiser persons here, I think I would advise them to avoid an area for about a one-foot perimeter around the piano. TIA, Paul </blockquote> </div></div> </div> </blockquote></div>