I am starting my first radiant project in my own home this April.  I am still researching and have found even more ideas than I can sort through.  I think I have Googled my limit and have not been able to find any personal info on using Roth panels or Ondol panels.  I would like to speak with anyone who has used them to get some feedback.  I would also like to see some pictures of peoples projects if possible.  I plan on taking plenty of pictures and video when I start this projuect and I hope to be a help to eveyone out there.