Hi all, Just curious about how you all might comment on the proposed use of geothermal heating and cooling in a historic house. It runs a continuous loop of water circulating through pipes 9 ft. underground where the temp is about 65 degrees year round. It is circulated through the house by putting water pipes under the floors and in the walls. While I loved the idea of 'going green' and maintaining a fairly stable temp (if indeed it really will be, as we have very hot summers and fairly cold winters), I really wonder about the wisdom of putting pipes with water in them in the walls of a very old and quite important two story house. Construction is wood except for exterior walls that are brick with space between inner and outer wall. Lucy ========================================================= Important Subscriber Information: The Museum-L FAQ file is located at http://www.finalchapter.com/museum-l-faq/ . You may obtain detailed information about the listserv commands by sending a one line e-mail message to [log in to unmask] . The body of the message should read "help" (without the quotes). If you decide to leave Museum-L, please send a one line e-mail message to [log in to unmask] . The body of the message should read "Signoff Museum-L" (without the quotes).