We live in Whistler, BC and recently had a Supreme/Ambiance Fireplace installed. The key selling point was a firescreen door so the unit could operate like a fireplace. The screen door is not functional, and has not been sufficiently tested by Ambiance. The unit needs a glass door with a tight seal to work, and we would have never purchased this unit had this been clear. With the screen door, smoke pours into our house when we lite a fire and after troubleshooting several configurations with the installer we have concluded it needs to be replaced. Does anyone have experience with Isokern/Earthcore for wood burning fireplaces. We are looking at that as an option in addition to fixed inserts. Thanks!