Biomass boilers use either seasoned wood (solid fuel), dried and processed wood chips or dried and compressed wood pellets in combustion chambers with water heat exchangers to produce hot water and heating. For reliability and availability wood pellets are the most convenient source of energy, however if you have your own source of wood then a solid fuel boiler could be the best solution for you.
How does it work?
Biomass pellet boilers require dried and compressed wood into pellets containing high energy density. The pellets are then delivered to site then stored in a dry hopper, before being fed in a controlled manner into a combustion chamber within the boiler unit according to demand. Different sizes of hopper and feed mechanism are available which will dictate how often manual loading and fuel deliveries are required, these are selected according to available space and client preference.
What do I need to install it?
A 1.5m x 1.5m internal space for the biomass boiler will be required and potentially additional space for an internal or external hopper will be required for additional fuel storage capacity. This depends on the size of the property needing to be heated and the desire of the client to manually load it. A flue will have to be run out from the boiler location to remove the by-products of the combustion.
As the biomass boiler is capable of putting out at similar temperatures to a fossil fuel boiler, a lot of the existing heating and hot water system can be maintained providing the safety systems are up to date. We undertake full technical surveys before the start of each project so these costs will be identified before you accept a price.
How much will it save me?
For domestic scale deliveries typical biomass prices are around £310 (incl. VAT) per tonne including delivery currently, dropping significantly if quantities are increased. This leads to a fuel cost of around 6.5p/kWh. This boasts a slight saving over conventional oil or LPG, which currently costs between 7.5-8p/kWh. The RHI tariff is also available for both commercial and domestic properties. The domestic tariff is currently 10.98p/kWh for 7 years whilst the 20 year commercial tariff is two stage, starting at 7.6p/kWh then dropping to 2.0p/kWh after a designated number of annual run hours. We will provide you a full cost benefit analysis tailored to your property to ensure you have clarity over your return on investment.