mass1Sometimes referred to as woodfuel heating systems, biomass heating systems are usually fuelled by plant materials, such as logs, woodchips, or energy crops. As such, heating with biomass is considered to be carbon neutral as the carbon dioxide (CO2) released when burning biomass is equal to the CO2 absorbed in the original growth of the biomass during photosynthesis.

“Biomass” is any organic matter that has stored energy throughout its life via the process of photosynthesis. When we speak about biomass in the energy industry, we are typically referring to the combustion of wood or waste products in order to release their energy in the form of heat.

In the UK and Scotland a biomass boiler burns logs, pellets or wood chips, and is usually connected to a central heating and/or hot water system in much the same way as a standard gas or oil boiler would. It is a great renewable solution for the direct replacement of aging oil or LPG systems central heating systems in areas not serviced by the mains gas grid, or to replace expensive electric immersion or storage heaters.

Solarizing can supply and install biomass boilers in a range of sizes and variants. From small domestic systems beginning at 16 kWth, all the way to 200 kWth+ commercial community heating systems.Solarizing have the experience and the ability to design and install systems that perfectly match your requirements and fully comply with Renewable Heat Incentive (RHI) design standards.

We only use high-quality boilers from manufacturers, ensuring that the system you invest in is built to last.

Affordable heating fuel: although the price of wood fuel varies considerably, it is often cheaper than other heating options.

Financial support: wood fuel boiler systems could benefit from the Renewable Heat Premium Payment and the Renewable Heat Incentive.

A low-carbon option: the carbon dioxide emitted when wood is burned is the same amount that was absorbed over the months and years that the plant was growing. The process is sustainable as long as new plants continue to grow in place of those used for fuel. There are some carbon emissions caused by the cultivation, manufacture and transportation of the fuel, but as long as the fuel is sourced locally, these are much lower than the emissions from fossil fuels. So although we cannot define biomass as completely carbon-neutral, it is a low-carbon technology.

Savings will vary depending on the existing setup and system choice, however for reference an automatic-fed pellet stove will typically save the average household £580 / year if displacing electricity, rising to as much as £720 for those displacing LPG. CO2 savings are significant; displacing electricity will save 7500kg of CO2 per year.
Our Biomass heating systems are highly efficient and are able to convert up to 90% of the heat energy produced during burning of the biomass fuel into usable heat. We have different sizes of system available whether you require heating for your home, business, or have larger heating requirements. They are also relatively quiet and very easy to use.

Biomass boilers can be installed in most properties, but there are some considerations to take into account. A local fuel supplier would be ideal, to reduce any costs associated with transportation. Perhaps most importantly, wood boilers are larger than their fossil-fuel cousins, so you will also need space to store the fuel: somewhere that’s handy for deliveries but also appropriate for feeding the boiler.

Our expert survey team will assess the suitability of your property for biomass boiler installation.

Our biomass boilers come in a range of sizes and designs, and can be installed both for domestic and commercial purposes.

We design biomass heating solutions which are fuelled by logs, woodchips and wood pellets and will provide a future of reliable operation with a focus on the longevity and 20 year operation of the systems. We can also supply and deliver high quality woodchip and pellet fuel to keep your system running.

Our in-house experience engineers will adapt any type of biomass system to connect to your central heating and/or hot water system in much the same way as a standard gas or oil boiler would.

Biomass heating systems are a great renewable energy solution for the direct replacement of aging oil, or LPG heating systems in areas not serviced by the mains gas grid, or to replace expensive electric immersion or storage heating systems.

There are a range of biomass boilers, each with their own benefits.


mass-imageTo date, wood chip boilers have dominated the commercial market in the UK. Fuelled by wood chips, these boilers can be configured to run on a wide range of different fuel specifications with moisture contents from 15% to 50%. Boiler sizes range from 40 kW – suitable for a large house or small business – to power station sized boilers of 100 MW and more. Boiler responsiveness is determined by the fuel moisture content that the boiler is designed to accept; in general the drier the fuel, the more responsive and efficient the boiler. They can be fed automatically from a store of woodchips, making it simple to run.


Pellet boilers and stoves range in size from a few kilowatts (kW) – for houses or small commercial buildings – to megawatt (MW) size units for district heating systems. Pellet systems are generally the most responsive of the biomass boilers, have the simplest controls and are the closest to fossil fueled boilers in terms of maintenance and operating intervention. The pellet fuel comes in a standardised size and moisture content, ensuring reliable and efficient heat generation. Smaller systems are usually manually loaded but larger systems can be automatically fed.


Log boilers require wood to be manually loaded into the boiler, making them suitable for houses or small applications where labour is available. In contrast to a log stove, however, they are typically loaded just once or twice a day, and this batch of logs is then burned in one go, at high temperature and efficiency. This means that log boilers are usually used along with a large water storage cylinder (a buffer tank, accumulator tank, or thermal store) to capture the heat produced, ready to be used when required.


Traditional log stoves provide radiant heat to a room. They need to be manually fed with fuel as required to maintain the heat output, and achieve significantly higher efficiency (around 70%) than open fires. Some log stoves incorporate a boiler to provide hot water for domestic purposes or to heat radiators. Some may also incorporate a hob and/or oven for cooking. As mentioned, log stoves generate radiant heat into the room in which they stand and it is not possible to provide hot water without also heating this room.

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