No pilot. No chimney. A combustion tube ran diagonally across the sump When the burner was ignited to heat the wash and final rinse, a spark plug provided the flash for the bang which vented out the front at toe level so you did not want to have a throw rug too near it nor did you want to be standing there at the moment of ignition. The final rinse was heated to 180F, which was not great for plastics, not that most pitchers or non-dish-shaped objects would fit into those regimented loading pattern racks anyway, and for drying, the door eeked open a few inches to flash dry the dishes.