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WOOD-FUELLED BOILER & STOVE RANGE  |
WOOD-FIRED HEATING |
BOILER MANUFACTURER |
INSTALLATION and MAINTENANCE |
FAQ
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What type of heating wood is most effective? The heat produced by the various existing types of wood is much the same. The differences that may be seen relate to the wood’s moisture content and its density. There are two main families of wood that can be burnt: hardwoods (from broad-leaved trees: oak, beech, ash, walnut and chestnut) and softwoods (from conifers: pine, fir, larch, etc.). The former are dense, so they produce a lot of heat from a small volume of wood. The softwoods have the characteristic of being consumed more quickly but producing a more rapid rise in temperature. (A cubic metre, or "stere", weighs roughly 400 kg in the case of a hardwood or 300 kg in the case of a softwood.) |
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What is the difference between wood chips and wood waste? Wood chips have been deliberately made into blocks, all of the same size. That type of wood may be called "forestry blocks". Wood waste comes from sawmills, joineries and other activities that use wood. It comes in all shapes and sizes, and even sawdust can be considered to be wood waste. |
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What do the descriptions G20 and G50 mean in relation to wood blocks? These descriptions refer to the size, in millimetres, of the wood blocks. During grinding, it is ensured that the wood blocks are all of the same size. |
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Why are people advised to use a dry wood for log-fuelled boilers? A perfectly dry wood (one that has undergone 12 to 24 months’ drying) will have a low moisture content – about 20% – which will allow better combustion and consequently be more efficient. |
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How should the wood be stored? Natural drying, meaning by exposure to open air, is the simplest way to dry the wood, with the wind and sun being particularly helpful. The wood should never be stored under polyethylene or nylon sheets, or in an airtight location. There are some elementary rules to which one should adhere: • The wood should be stored in a ventilated location. • The wood should be split (increasing the surface area for evaporation). • The wood should be shaped lengthwise in relation to use. • The wood should wait at least 18 months before being used. |
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What length of logs should I select for my heating equipment? Logs come in a number of lengths, from 20 cm to a metre. The user should choose the length that corresponds to the equipment’s firebox, as specified in the manufacturer’s technical description. N.B. With logs that are too long, the wood does not fall as it should, and the fire goes out. With logs that are too short, combustion may be of poor quality, resulting in reduced power. |
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How can one be sure of the quality of wood pellets? Good-quality wood pellets are made solely from softwoods and contain no additives, while having a low moisture content (less than 8%). |
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Lower calorific value for various species
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