Your fuel target: details that will help in planning economy during the Second World War, so that fuel rationing can be avoided. The number of hours taken by various domestic appliances to consume one unit of fuel. Items include light bulbs, a radio, a vacuum cleaner, a kettle, an oven, a boiler, gas and electric fires, a kitchen range and a lamp. The types of fuel are coal, gas, electricity, coke and oil, in descending order of quantity.