When buying logs, one of the first things you need to know is whether they are from hardwood or softwood tree species – or mixed.
The general difference is that hardwoods (deciduous, broadleaved tree species) tend to be denser than softwoods (evergreen, coniferous species). This means a tonne of hardwood logs will occupy a smaller space than a tonne of softwood logs. Dense woods will burn for longer than less dense woods, so you will need fewer ‘top ups’ to keep your stove burning. If you buy wood by volume you will get more kilowatt hours of heat from a cubic metre of hardwood than softwood – assuming both types have the same moisture content.