Grants Biomass Boilers
Heppelthwaite the Red Van Plumbers are approved installers of Grants Biomass boilers. The Grant Spira Condensing Wood Pellet Boilers utilize award winning patented stainless steel turbulator baffle system. This is world renowned for guaranteed quality and installed by qualified “The Red Van Plumbers”, you are in safe and competent hands when you choose a Grant boiler.
Grant Spira condensing wood pellet boilers (biomass)
How the boiler works
On start up the auger feeds the wood pellets from the hopper into the burner where it is lit by an ignition element. The burner output modulates to achieve the set temperature by controlling the feed rate of pellets. The fan in the burner propels hot gas generated from the fuel into the Spira’s primary heat exchanger. The heat energy is then transferred to water from the central heating system, before being circulated around house to radiators/underfloor. It is important to note that in modern pellet boilers, biomass boilers, up to 20% of the energy that is produced is lost to the atmosphere through waste gases exhausted by the flue system, The Spira has a unique secondary condensing heat exchanger which has been designed to capture some of this lost latent heat enegy, so it can maintain extremely high efficiencies. The boiler’s fully automatic cleaning system will periodically wash the condensing unit of any debris in the tubes and also activate the brazier within the burner to clear the combustion chamber of ash build up, which reduces maintenance time.
A unique and efficient biomass boiler
Single units are available in outputs of 6-26kW with an efficiency of 97.4%, and 9-36kW with an efficiency of 93.1%. They come complete with a pellet store/hopper and feed auger, which automatically supplies the Spira with fuel.
Grant has also extended the output options of the Spira to enable installations up to 72kW to be accommodated, utilising two boilers and a central hopper/twin auger arrangement. Models include 12-52kW, 15-62kW and 18-72kW. Using two boilers to achieve higher outputs is very cost effective, as when the units are combined in this way their precise electronic burner controls allow both units to modulate as one, down to just 25% of maximum load when the full output is not required. This, combined with the extremely high condensing efficiencies achieved, makes the Spira a unique option when considering a biomass boiler.
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