As the requirement for cleaner heating solutions gathers pace, condensing biomass boilers – boilers that burn wood pellets made from recycled sawdust or virgin timber from managed sources – are increasingly being seen as sensible options for people looking to reduce their carbon footprint.
One of the leading manufacturers of wood pellet boilers is Grant UK, a company that has been designing and manufacturing reliable, high quality, easy to install heating products for more than 35 years. Perhaps best known for their award winning oil fired condensing boilers, Grant UK has expanded its business very successfully into the new world of renewable heating technologies, offering the most efficient air source heat pumps, a sector leading eco efficient solar thermal system as well as the Spira Wood Pellet boilers – all in a range of sizes that would complement virtually any UK residence.
Grant has welcomed The Department of Energy and Climate Change (DECC) decision to include the Grant Spira range of Condensing Wood Pellet Boilers in the Domestic Renewable Heat Incentive Scheme (RHI). The MCS approved Grant Spira Condensing Wood Pellet boilers are available in outputs of 6kW up to 72kW and deliver efficiencies up to 97.4% which is impressive by any standard. Models are available for domestic properties or small scale commercial installations, the latter achieved by using two boilers mounted side by side. The solution is very efficient as the precise electronic burner control allows both units to modulate as one, down to just 25% of maximum load when the full output is not required.
With most pellet burning boilers, up to 20% of the energy that is produced is lost to atmosphere via the flue system. The Spira range features a unique secondary condensing heat exchanger designed to capture some of this lost latent heat energy, conveying additional warmth for the home. It’s just one example of the intelligent, value added design features you can expect from Grant UK products.
The Grant Spira Wood Pellet boiler requires very little maintenance in comparison with other wood pellet appliances. It has a self-cleaning system for the primary and secondary heat exchangers ensuring the system is debris free. The self-cleaning burner uses a premium EN Plus A1 standard pellet with low ash content, requiring minimal maintenance.
Wood pellet boilers are generally larger than traditional oil or gas boilers and will require a hopper to store the fuel, sited adjacent to the boiler. The Grant Spira is designed to be located in a garage, store or outhouse building, so it’s important to consider its position prior to installation. In addition, ventilation is a crucial factor for the appliance and the flue in order that its operation is safe and efficient. The boiler has an automated cleaning cycle which does result temporarily in an increase in noise levels, so that too should be considered when selecting a location for the boiler.
The Pellet storage is available in capacities from 3 to 6 tonnes. Pellets can be auger fed from storage hoppers into the intermediate pellet store supplied as standard with the boiler. Alternatively, for installations where an auger fed hopper is unsuitable, there is the Grant SpiraVac unit which swiftly and conveniently moves the pellets from the Grant external store to the internal Spira boiler hopper via vacuum hose. The system enables the bulk pellet store to be positioned up to a distance of 20 metres from the boiler.
Managing Director of Grant UK, Paul Wakefield says: “Our training team are seeing a huge increase in demand for knowledge in this arena and courses are at capacity.” Full details of the Grant UK Spira Wood Pellet boiler range and accessories can be found at www.grantuk.com.
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