1.1 ,This specification covers food cookers and food reheaters which use steam as the heat source. These units are also known as steamers, steam ovens, and steam cookers which utilize steam generated by gas, electric heat, or steam coil sources, or a combination thereof, in commercial and institutional food service establishments. This specification can be used for sub-zero-pressure steamers, pressure steamers, combination pressure/pressureless steamers, boilerless steamers, and connectionless steamers, and does not cover steam cooking equipment used by food processors who normally package the food that they cook.