Ventilated gas oven for food products and heat exchanger for said oven

Ventilated gas oven for food products comprising a cooking chamber (12) equipped in the lower part with a feeder and/or cooking plate (13) for food products, a source that supplies the heat inside the cooking chamber (12), a motorised centrifugal fan (15) positioned near the rear wall (20) of the cooking chamber (12) as well as diffuser elements (16) for air circulation by a motorised centrifugal fan (15) and extending into the cooking chamber (12) over and below the said cooking plate (13) wherein the source that supplies the heat comprises a burner for gas or a similar fuel (101) and a heat exchanger (100, 100'), at least comprising a pipe (103) and at least one radiation body (104) positioned crosswise in the cooking chamber (12) and inserted into said pipe(103).