If you choose wood for constant heating, then you should give the choice in favor of the highest coefficient of heat transfer, which is affected by the density. Such firmness may differ oak, beech and birch. Due to the fact that the oak, of course, is more priority, but it is more difficult to find it, then a good option will be a birch, according to the density. Middle -free ones include coniferous trees, as well as a pear and apple tree. Such varieties will be less heat, but it will flare up much faster. Soft varieties of trees as aspen or alder are more often used in decorative fireplaces, which are aimed more at creating comfort and decor.
