The Cooker 400K/KPF features an integral automatic timer and has the added benefit of an optional external programmer. The 400 KPF’s cast-iron lower oven operates at half the temperature of the main oven. The power-flue makes if possible to site the cooker virtually anywhere in a kitchen. If you wish to use a conventional flue, then the 400K is the cooker for you. The 400K and 400KPF run on commercial kerosene.