3 hours ago, gfweb said:
Or just use an induction hob.
What difference would that make? And what kind of induction hob would be able hold several gallons of oil / fat?
As I already said, fish and chip shops don't use hobs and pans. You can't cook hundreds of fish and thousands of chips at the same time that way. Not quick enough. These places get very busy (or used to).