Fitted my first DRU fire a few weeks back, an LPG Circo BF Stove..... 3 weeks after fitting it I got a call back as the glass had completely sooted up, I mean totally black. After re-reading the translated Dutch fitting instructions to see if I had done something wrong (they are quite ambiguous and vague) all I could find was that one of the logs had somehow moved a little from its correct seat so I stripped it, cleaned the glass and re-laid the logs. I phoned DRU to check if I had over looked anything and they said it was probably this out of alignment log. I know Coal and log placement is important, especially with the soot LPG fires produce but this was awful and also a very expensive fire.
Might look nice but a horrible thing from an engineers perspective, hope I don't have to fit another....