The owners are firing one of the boilers to run the laundry, the calliope and whistle, and a few other things. They have a natural gas burner on the boiler. It sits directly on top of the original Bunker C burner and can apparently be removed at a moment's notice to use the old burner again. It is also fully automated, using some sort of computer and monitoring system to keep it running perfectly. It produces about 60 pounds of pressure, of which around 30 makes it back to the calliope.