How Much Does a Biomass Boiler Cost?

a Biomass Boiler in action

Installing an automatic biomass boiler can cost between £5,000 to £25,000

The Renewable Heat Incentive pays you per kWh of renewable heat you produce

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As more and more people are become concerned about their carbon footprint, more eco-friendly ways of heating are becoming more popular. This is where biomass boilers come in.

Biomass boilers could be the answer to your green issues, and can save you money in the process!

If you'd like to dive right in and get free quotes from our suppliers, pop your details in this form, and our local professionals will be in touch shortly.

In This Boiler Guide:

a Biomass Boiler in action

Biomass Boilers in the UK

Biomass systems are fuelled by wood pellets, chips or logs which can either provide heating in a single room, or power central heating and hot water boilers.

Biomass boilers generally take up more space than a regular gas or oil boiler and are more suitable for people not connected to mains gas who have space for storage.

Recent figures show wood-burning biomass boilers account for only 0.5% of all boiler sales nationwide.

This suggests many homeowners in the UK still choose to have conventional gas and oil boilers, despite the environmental benefits and energy bill savings biomass models offer.

How Much Does a Biomass System Cost?

Type of Biomass Boiler
Size of Boiler
Average Cost
Manually Fed Log Boiler
£4,000 to £7,000
Manually Fed Log Boiler
£7,000 to £10,000
Automatically Fed Pellet Boiler
£9,000 to £16,000
Automatically Fed Pellet Boiler
£15,000 to £21,000

Installing an automatic biomass boiler in a domestic residence can cost between £5,000 to £25,000. A domestic-use biomass boiler will typically cost an estimated £15,000 during its first year including installation and fuel costs.

Prices vary depending on the make, size and level of automation of the boiler. Automatically fed pellet boilers are slightly more expensive than manually fed log boiler systems.

In addition to the equipment and installation costs, the price of fuel will also need to be factored in.

Wood pellets derived from waste wood materials are the most suitable fuel for biomass boilers and typically cost between £150 and £200 per tonne, with the average household requiring 11 tonnes of wood pellets per year. That's around £1,925 per year in all.

Did You Know?

If you have large space for fuel storage and can buy wood fuel in bulk, this will also make a cost saving of around £220 per tonne.

See also:

How much does a regular boiler cost?

Can I get a government grant for my boiler?

What Funding Options are Available?

Homeowners with wood-fuelled biomass boilers are eligible for The Renewable Heat Incentive (RHI). This is a UK Government scheme designed to encourage an uptake of renewable heat technologies within households.

RHI cash payments are made quarterly over seven years and the amount is dependent on certain factors such as your system type and current tariffs.

To comply with RHI rules, you must source your biomass fuel by suppliers on the Biomass Suppliers List (BSL), and your system must also be on the Domestic Renewable Heat Incentive Product Eligibility List.

Did You Know?

You can save more than £400 each year, just by switching your home’s energy supplier. If you’re looking to cut down your bills, this one’s a bit of a no-brainer.

That’s why we’ve partnered with Switchd. With four different price plans (including a free option), Switchd will find you cheaper, greener energy suppliers in no time.


Do the Savings Outweigh the Initial Costs?

Installing a biomass boiler is seen as a long-term investment, and it can typically take around six or seven years before you start to see a return from reduced energy bills.

Did You Know?

The environmental savings in carbon dioxide are significant, with the average household reducing emissions by 15.7 tonnes a year.

The financial savings are variable. Replacing an older gas heating system with a wood-burning system might save you up to £225 a year, and replacing an old electric heating system could save you up to £990 per year.


Which Biomass Boiler Is Best?

If you are considering getting a biomass boiler, there are three main types of fuel to consider, which will vary based on the size of your household.

Log Boilers

Log-burning boilers have to be filled with wood by hand and require considerably more manual work. These are more suitable for smaller households.

You will need a lot of logs to heat a whole house, which will need to be manually loaded at least once daily. Logs can be sourced from woodland, with the right permits and safety precautions, of course.

Pellet Boilers

Pellets are easier to use and much easier  to control than logs. They're also more suited to small to medium operations. Pellet boilers can run automatically in the same way that gas or oil boilers operate.

The vast majority of pellet and chip boilers use automatic fuel feeders.

Pellets are more expensive than wood chip and logs. It’s important to source a good quality of pellet as some biomass boilers can reject certain types.

Wood Chip Boilers

Chips are used to heat larger buildings or groups of houses, and a local supplier is necessary. Extra care should be taken when using recycled wood, as there is a high risk of contaminates such as formica, plastics and paint.

See also:

Combi boiler guide

Conventional boiler guide

System boiler guide

What next?

Ready to start heating your home in a more eco-friendly way? We certainly hope so.

Head over to our short form, and pop in your details. Once you've done this, our local professional installers will get in touch with free boiler quotes. Going green has never been easier!

Jonathan Whiting
Jonathan Whiting

An eco hero with a head for numbers, Jon’s data visualisation skills are legendary. Whether it’s determining what countries will survive climate change or the animals most at risk from it, he has the planet’s best interests at heart.

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