In principle, nonetheless, all tree species are suited as firewood, “suggests heating skilled Hermann Hansen, marketing consultant at Göttinger Tagblatt’s Renewable Sources Company (FNR). Much additional crucial for the combustion is that the wooden is properly dried Hans Eiber, forester and creator of the non-fiction e-book “Brennholz”, suggests he prefers hard, dense-pored woods such as beech and oak. According to Eiber, beech burns even cleaner.
Oak, on the other hand, contains a lot of tannins, i.e. acids, which can hurt the stove if used usually. With soft woods like spruce and pine, you need to don’t forget that the resin they comprise, when burned, contains soot. Hansen also tells Tagblatt that resins are really electricity-prosperous and that a spruce log as a result delivers a lot more heat than a beech log.
However, the drinking water content material plays the decisive portion in the calorific benefit. Freshly reduce wooden can include up to 50% of its fat in water. Right after at least 1 year of dry storage, the wood is “dry in the air” and therefore is made up of only 15 to 20% drinking water. If wood is burned although moist, the h2o ought to first evaporate in advance of combustion can begin. This success in a decline of calorific worth.
On top of that, not all wood components are fully burned. Wood gases can type in the variety of tar and soot in the chimney. A fire in the chimney can manifest. Burning moist wood is consequently not only uneconomical, but also damaging to the surroundings.
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