... ten types of electric appliance, including barbecue oven, traditional oven, electric rice cooker, egg cooker, electric gridiron, ... the effect of three types of heat transmission: heat convection, heat exchange and heat penetration. Optimal energy-saving ... oven (2500W) to roast chicken, while it takes only 30 minutes for light-wave oven (1000W). 12L Automatic frying roaster with halogen oven ...