Pierre,
Thanks so much for including me in your response. I think you were spot-on comparing Viessmann to Apple. The Viessmann has a very innovative DCC controller which the competitors are now copying. I enjoy supporting small innovative companies like Viessmann. They have always answered my emails promptly and to my satisfaction. That said, I hope Viessmann will take Apple's lead by opening their source code for other software companies to help develop "bells and whistles" for the system. This could help Viessmann's bottom line by allowing them to sell licenses to software developers. Viessmann could have online or in-house conferences with future developers. I think this could speed up the development of software for the Commander. In these tough economic times, there may be quite a few software engineers with free time on their hands that would like to develop their own products for the Viessmann Commander. I'm going to leave this post in English, because my translation program is so poor at communicating what I'm really trying to say. Perhaps someone on the Forum has a better one. Patiently waiting....lewi