I am a homeowner with a radiant heat system. The local viessmann rep talked me into installing a vitodens 200 boiler in my house and I believe it was a mistake to do this.
I have had trouble with it several times. This past winter it would stop working and I would have to reset it. The installer (on recommendation from the local rep tech support) replaced 2 over temp sensors and fixed the problem. The unit was still under warranty, but labor was not covered so I am stuck with a very large labor bill because of faulty $XXX sensors. This was the second time he replaced one of those sensors.
The installer (whom I came to have a lot of respect for) told me that he thought the viessman was difficult to work with and install. He also showed me some low quality plastic parts inside the unit that I was suprised to see. He was not impressed with the viessmann boiler or control system.
Hope this helps some other home owner...do not be pushed into using something you do not want to do.
The other thing I found surprising was the gross markup the installers charge for viessmann. I believe my installer paid the supply house about $XXXX for the boiler. One quote I recieved from an installer wanted $XXXX extra for a viessmann, and that was for a job that had weil mclain boiler included. So he already charged me $X for the weil mclain and was going to ad $XXk on top of it.
(No pricing, due to site rules )
[Edited by Jultzya on 05-25-2006 at 07:36 PM]