The document compares the costs of various fuels for heating including wood chips, wood pellets, natural gas, heating oil, LPG, and electricity. It provides the price per unit of each fuel, the kilowatt hours (kWh) provided per unit, and the cost per kWh for using each fuel in a boiler. Wood chips are the cheapest option per kWh at 2.9p/kWh, while electricity is the most expensive at 15.0p/kWh. The document presents this information in a table to allow for easy comparison of the different fuel options.