Wood pellets are a type of biomass fuel, made from compacted sawdust or other waste from sawmilling and manufacturing.
The calorific value of wood pellet averages out at about 4.8 kWh per Kilogram. Moisture content and the source material can have a bearing on the final heat yield.
1 Litre of oil = 2 Kg of wood pellets and 2.8Kg of wood chip (at 30% Moisture content)
The cost per tonne is currently around £200 - £260
We are the local suppliers of both Imperia Heat & KG Premium wood pellets and can provide a quick efficient delivery service at very competetive prices.
They come in a range of sizes: 6 or 8 mm diameter is typical, while for larger systems 10 or 12 mm diameters are common.
Wood pellets should be dry, clean, mechanically robust and have an ash content defined by the appropriate standard. They should also flow freely and be able to be delivered via a pneumatic system. To qualify for RHI payments they must also be BSL registered.
Wood chip boilers are a brilliant option for those with access to waste wood and a wood chipping machine. Wood chip can be even more cost effective than wood pellets and, if you are burning your own waste, you can't get a cheaper fuel alternative.
Around 3.5 kWh per Kilogram, depending on moisture content.
Wood chip can take up to three times the storage space of wood pellets and need to be kept dry. Wood chip boilers are normally very versatile and will take most biomass pellets and sometimes logs placed directly into the burning chamber.
A wood chip boiler differs from a pellet boiler in the way that the chips are kept flowing into the boiler. Wood chips will not flow as easily as wood pellets, so an agitator mechanism is needed. The wood chips are placed into a drum and the agitator arm stirs the chips to keep them flowing. Without this the wood chips could solidify into a solid mass in the hopper and cause system blockages.
We are as yet un-equipped to supply Wood chips but therev is a nationwide network that is growing monthly. Please look at on Google for suppliers in your area.
3.6 kWh per Kilogram, depending on moisture content.
Yes, logs can be placed directly into the burning chamber of most Biomass boilers available, but for frequent log burning it is recommended that you include a heat storage tank. A modern alternative are compressed logs, these are basically log sized wood pellets and give the same benefits as pellet in most circumstances.