Pan-type apparatus (10) to fry or boil food products in a suitable liquid, it comprises a pan (12) to contain the liquid, a first casing (14) which delimits inside itself a closed housing chamber (22) which houses at least part of the pan (12), burner means (18) disposed in the housing chamber (22) and suitable to generate a flame which, directly or indirectly, heats the pan (12) and flue means (19) to extract the combustion fumes from the housing chamber (22). The apparatus comprises separation means (24) disposed in the housing chamber (22) and suitable to define at least a first chamber (26) adjacent to the pan (12), which houses said burner means (18), and a second chamber (28), between the first chamber (26) and the walls of the first casing (14), which communicates on one side with the first chamber (26) and is connected on the other side to said flue means (19). A conveying path (P) for the fumes is defined between said at least one first chamber (26) and said at least one second chamber (28), so as to determine a forced transit of the fumes to lap the pan (12) for a determinate transit time.
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