Use this energy chart provided by Coed Cymru to see how wood chip compares to other energy sources.
1) Locate the price you are paying for the fuel (in pence per litre or £ per tonne) on the appropriate fuel column.
2) Move horizontally to the dark blue column and read off the heat cost in pence per kWhour.
3) Continue horizontally to find the equivalent cost of a different fuel. How does this price compare with the market price of that fuel? Should you consider changing?