Surface Heating
The cooking surface on a Steam Shell Griddle operates on the basic principle that steam transfers heat faster and more efficiently than any other method.  Therefore, circulating steam beneath the griddle plate is used to heat the cooking surface; not electric elements or gas burners that can cause temperatures to fluctuate by up to 100°F on the griddle surface, causing burning and fluctuating cook times.
 
American Griddle Steam Shell Cook Times