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Biomass Boilers – An Overview

Grant biomass boiler rangeBiomass boilers are the RHI approved boiler of choice to replace fossil fuelled appliances.

The instability of oil and gas prices have meant that many homeowners are looking for an alternative source of heating to provide warmth and hot water for their properties.

Unlike fossil fuels which are a depleting resource, biomass fuel can be sourced from a “closed carbon cycle” system.  This is an environmentally friendly way of harvesting fuel to heat your home or building. A closed carbon cycle system is one where the amount of carbon emitted during the burning of biomass fuel is balanced by the planting of trees, therefore cancelling out the harmful effects of  heat being released into our atmosphere.  Trees need carbon dioxide to grow so it is good partnership, one which is environmentally friendly.

Grant condensing biomass boilers are additionally MCS approved, so included in the Government’s Domestic RHI scheme.

Biomass boilers and wood pellet fuel

The term biomass refers to a type of fuel sourced from living/non living plant matter, which could be in the form of either wooden logs, wood pellets or chips – wood pellets being the most energy efficient.  Our Spira condensing biomass boiler use wood pellets.

The process of burning wood produces ash, so biomass boilers normally require a certain amount of regular cleaning and maintenance, which can be tedious. Grant has, however, found a better solution with a unique ‘self cleaning’ boiler design, reducing the need for regular cleaning.

Biomass boilers differ from traditional solid fuel boilers. Apart from the green aspect, the units are fully automatic and behave more like an oil or gas boiler, using advanced controls which cleverly regulate the amount of fuel being delivered to the burner to match the heat demand on the boiler. The fuel is fed to the burner via an auger connected to the adjacent pellet store/hopper. This can, in turn, be automatically supplied from a bulk pellet store which can vary in size.

Our boilers have many benefits including:

A rapid ignition system with modulating burner

This means our boilers operate in much the same manner as a standard gas boiler to give you a greater degree of control of your energy output and control.

Requires little intervention

Grant are proud to have a unique self-cleaning design and automated fuel feed so the need for you to intervene is kept to a minimum.

Lower energy consumption and greater efficiency than the competition

A boiler using biomass fuel is far more cost effective to run than fossil fuel boilers.  Due to the extreme efficiency of our boilers (thanks to our award winning patented condensing heat exchanger) we are able to provide you with some of the most efficient boilers on the market.

Uses wood pellets as opposed to other types of biomass fuel

During the burning of biomass fuel any water content must be evaporated prior to combustion, this requires additional energy.  Our boilers use the most efficient form of biomass fuel which is wooden pellets.  Compared to logs and wood chips these have a very low moisture content.  This helps with their combustion efficiency and therefore reduces your energy consumption.

Suitable for home use

Grant biomass boilers are a safe, cost effective and convenient way to heat your home.  One thing to consider is the amount of space you may require.  The Grant Spira is designed to be housed in either a garage or out-house, so where both the boiler and store will be located at your home is an important consideration before purchasing.  The biomass boilers use an automatic feed for the wood pellet fuel too, which means more convenience for you.  Combine this with its self cleaning systems and you have a great choice for cost-effective green home heating.


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