Thermoboost - When a Thermoboost is heated to 150°C in the oven for 30 minutes then placed in the base of a Thermobox, heat is slowly released into the food products. In field tests this doubled the length of time that a Thermobox can hold food at temperatures above 63°C. The Thermoboost is available in ¼ and ½ gastronorm and pizza box size.