Continuous oven for continuous baking, - having at least two continuous baking chambers (2, 3) lying one on top of the other, - having a plurality of oven modules (2 1, 3 1) with partial baking chambers, which together form the continuous baking chambers (2, 3) between a respective initial oven module (2 1, 3 1) leading in the baked goods conveying direction (F 2, F 3) and a respective final oven module (2 3, 3 3) in the baked goods conveying direction (F 2, F 3), - wherein the oven modules (2 1, 3 1) are arranged on multiple levels in such a way that the at least two continuous baking chambers (2, 3) lying one on top of the other are thereby provided, - having at least one baked goods conveying device for continuously conveying baked goods between the respective initial oven module (2 1, 3 1) and the respective final oven module (2 3, 3 3) of one of the continuous baking chambers (2, 3), - having a heater for indirectly heating the continuous baking chambers (2, 3) with a hot gas via a hot gas flow path (11 1, 11 2), wherein the heater has: -- a first heating device for selectively indirectly heating one of the initial oven modules (2 1, 3 1) of exactly one of the continuous baking chambers (2; 3) or a plurality of initial oven modules (2 1, 3 1) of a plurality of continuous baking chambers (2, 3), -- a second heating device for selectively indirectly heating --- at least one oven module (22, 23; 32, 33) of the oven modules (21, 31) following the initial oven module (21; 31) of exactly one of the continuous baking chambers (2; 3) or --- at least one oven module (22, 23; 32, 33) of the oven modules (21, 31) following the initial oven module (2 1; 3 1) of a plurality of continuous baking chambers (2, 3), - wherein each of the heating devices (8, 9) of the heater has a burner (6 1, 6 1) and a hot gas fan (7 1, 7 2), - wherein the continuous oven is designed such that the at least two levels of the continuous oven formed by the multi-level arrangement of the oven modules (2 1, 3 1) can be operated separately from one another. - having at least two continuous baking chambers (2, 3) lying one on top of the other, - having a plurality of oven modules (2 1, 3 1) with partial baking chambers, which together form the continuous baking chambers (2, 3) between a respective initial oven module (2 1, 3 1) leading in the baked goods conveying direction (F 2, F 3) and a respective final oven module (2 3, 3 3) in the baked goods conveying direction (F 2, F 3), - wherein the oven modules (2 1, 3 1) are arranged on multiple levels in such a way that the at least two continuous baking chambers (2, 3) lying one on top of the other are thereby provided, - having at least one baked goods conveying device for continuously conveying baked goods between the respective initial oven module (2 1, 3 1) and the respective final oven module (2 3, 3 3) of one of the continuous baking chambers (2, 3), - having a heater for indirectly heating the continuous baking chambers (2, 3) with a hot gas via a hot gas flow path (11 1, 11 2), wherein the heater has: -- a first heating device for selectively indirectly heating one of the initial oven modules (2 1, 3 1) of exactly one of the continuous baking chambers (2; 3) or a plurality of initial oven modules (2 1, 3 1) of a plurality of continuous baking chambers (2, 3), -- a second heating device for selectively indirectly heating --- at least one oven module (22, 23; 32, 33) of the oven modules (21, 31) following the initial oven module (21; 31) of exactly one of the continuous baking chambers (2; 3) or --- at least one oven module (22, 23; 32, 33) of the oven modules (21, 31) following the initial oven module (2 1; 3 1) of a plurality of continuous baking chambers (2, 3), -- a first heating device for selectively indirectly heating one of the initial oven modules (2 1, 3 1) of exactly one of the continuous baking chambers (2; 3) or a plurality of initial oven modules (2 1, 3 1) of a plurality of continuous baking chambers (2, 3), -- a second heating device for selectively indirectly heating --- at least one oven module (22, 23; 32, 33) of the oven modules (21, 31) following the initial oven module (21; 31) of exactly one of the continuous baking chambers (2; 3) or --- at least one oven module (22, 23; 32, 33) of the oven modules (21, 31) following the initial oven module (2 1; 3 1) of a plurality of continuous baking chambers (2, 3), --- at least one oven module (22, 23; 32, 33) of the oven modules (21, 31) following the initial oven module (21; 31) of exactly one of the continuous baking chambers (2; 3) or --- at least one oven module (22, 23; 32, 33) of the oven modules (21, 31) following the initial oven module (2 1; 3 1) of a plurality of continuous baking chambers (2, 3), - wherein each of the heating devices (8, 9) of the heater has a burner (6 1, 6 1) and a hot gas fan (7 1, 7 2), - wherein the continuous oven is designed such that the at least two levels of the continuous oven formed by the multi-level arrangement of the oven modules (2 1, 3 1) can be operated separately from one another.