Hardwood Australian firewood is a hardwood which is denser than softwood, so it gives off more energy. High Density Australian firewood is denser and heavier wood than others and contains more heat per volume, burn longer, burn slower, more steadily, and thus provide warmth for longer. Ignition Australian firewood can be easily lit because it is very dry wood. The drier the wood the easier it is to ignite. Moisture content Australian firewood has been dried to 10-20% moisture content to ensure that it burns well, produces more heat and creates less smoke and creosote. Smoke Australian firewood gives off little smoke, itâ??s important that you consider whether the firewood you choose will smoke heavily or not when itâ??s burned. Sparks Australian firewood is very dry, if wood isnâ??t completely dry, it will spark when it burns