This design of superheater produced a superheat of from above saturation temperature. To minimize gas solubility the superheat temperatures can be kept low. This is when small entrained air bubbles compress and superheat with rapid rises in pressure. Superheat is the amount of heat added above the boiling point. It was built with a low-degree superheat domeless boiler and still carries a domeless boiler. But a container of liquid with only microscopic bubbles can superheat dramatically. Her boilers ran at but relied on a substantial amount of superheat. Other liquids are known to superheat including 2% milk and almond milk. Unlike most other solids, ice is difficult to superheat. This process can increase the contact resistance, superheat the relay and lead to fires.