Shaver Boiler Question

[boyland]

I have been looking at the shaver boiler it appears with the front of the boiler being a square box door and burn box being round with a square door there is an area in between the round and square that would be fully exposed to heat? Meaning it would be able to get pretty hot not surrounded by water. I wonder if anyone has experience to share on that area as well as the temp of the door itself.

I saw the one guy sprayed his with foam I would be worried about this area catching the foam on fire?

Let me know what you guys are experiencing with this, I am evaluating this unit.

Thanks