Since 1978 defy has revolutionised cooking with thermofan technology that allowed us to cook two meals at the same time. In addition to the hot air coming from the thermofan, hot air is blown into the centre through the ventilation holes located on the sides of the cavity. This air circulation method results in more homogenous air distribution. Surf cooking technology allows you to cook three different meals at the same time without mixing their flavours and aromas.