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Oil Boilers, Biomass Boilers, Solar PV, Air Source Heat Pumps, Hot Water Cylinders


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 home-owners 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 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 spira boilers are MCS approved, so are included in the Government’s Domestic RHI scheme.

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 range use wood pellets.

The process of burning wood produces ash, so it’s natural that a certain amount of regular cleaning and maintenance will be required which can be tedious. Grant has, however, found a better solution with a unique ‘self cleaning’ design, reducing the need for regular cleaning.

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 burner. 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 product can operate in much the same manner as a standard gas equivalent 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 extreme efficiency (thanks to our award winning patented condensing heat exchanger) we are able to provide you with some of the most efficient boilers available on the market.

Uses wood pellets for extreme efficiency

During the burning of any fuel any water content must be evaporated prior to combustion, this requires additional energy.  Our boilers use the most efficient form of fuel – 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 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 range is designed to be housed in either a garage or out-house, so where exactly you will be locating the unit at your property is an important consideration before purchasing.  You have the ability to 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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