Dovre stoves and fires are designed to burn wood and smokeless fuels and have been independly tested to exacting standards for safety, heating efficiency and emissions. The 250, 225, 425, 525, 500, 700, Vintage and Sense models have also been approved for the burning of wood in Smoke Control areas. Wood is the better fuel in environmental terms being carbon neutral, as the amunt of carbon dioxide released into the atmosphere is approximately the same as that absorbed by the tree during growth . It is also a renewable resource, practiculary when derived from plantations and culttivated woodland. For optimum results, we recommend logs should be seasoned for 2 years or more to achieve a moisture contet below 20 %. This will not only give up to twice the output of freshly felled timber but help avoid a build up of tar in your flue. Furthermore, if you can obtain hardwood logs this is better still, as they will have around twice the calorific value of softwoods, of equivalent weight.