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Which is the Best Biomass Boiler?

The best biomass boilers will make your home more efficient, reduce your energy bills and shrink your carbon footprint. When looking to heat your home with biomass, manufacturers Froling, Grant, Windhager and Viessmann are all well worth considering.

Best biomass boilers

The best biomass boilers are manufactured by Froling, Grant, Viessmann and Windhager. By comparing the biomass boilers manufactured by the brands, you’ll find a suitable renewable heating system for your home.


Over the past 50 years, Froling has played an important role in developing highly efficient biomass heating systems. They have a wide range of biomass boiler models that can run on wood pellets, chips or logs. And with a number of outputs available, you’re likely to find a suitable boiler to meet the heating and hot water demands of your property.

Froling Biomass BoilersOutput Ratings (kW)Fuel TypeEfficiency
PE1 Pellet7, 10, 15, 20, 25, 30, 35Wood pelletsA+
PE1c Pellet15, 20Wood pelletsA++
P4 Pellet48, 60Wood pelletsA+
T4e19.9, 25.1, 30, 35, 45, 49.9, 60Wood chipsA+
SP Dual22, 28, 34, 40Wood logs and pelletsA+
SP Dual Compact15, 20Wood logs and pelletsA+


Grant specialise in wood pellet boilers that are highly efficient and available in outputs ranging from 4 kW up to 36 kW. And to help you save space, the Spira models can be installed in a garage or out-house.

Grant Biomass BoilersOutput Ratings (kW)Fuel TypeEfficiency
Spira18 – 36Wood pelletsA+
Spira 226 – 36Wood pelletsA+
Vecta (Internal)4 – 16Wood pelletsA+
Vecta (External)4 – 16Wood pelletsA+


Most well known for the gas boilers, Viessmann now offers a range of biomass boilers that run on wood pellets.The Vitoligno 300-C range is available in outputs of 8 kW up to 48 kW and has a high efficiency performance of 95.3%.

  • Offer flexible and space-saving installation
  • Automatic ash removal
  • Take control of the heating from anywhere using the Viessmann app
Viessmann Biomass BoilersOutput Ratings (kW)Fuel TypeEfficiency
Vitoligno 300-C8, 12, 18, 24, 32, 40, 48Wood pelletsA+


Windhager offers an extensive range of biomass boilers that can run on wood pellets, logs or chips. Each unit is very efficient (at least 92%) and with outputs ranging from 3 kW right up to 240 kW there’s a suitable system for small, medium and large properties.

Windhager Biomass BoilersOutput Ratings (kW)Fuel TypeEfficiency
BioWIN 2 Touch3 – 33Wood pellets94.4%
BioWIN Lite3 – 26Wood pellets94.4%
BioWIN Excel11 – 60Wood pellets92%
BioWIN Kaskade6.5 – 240Wood pellets92%
FireWIN3.8 – 12Wood pellets95.7%
LogWIN Premium13 – 50Wood logs92%
LogWIN Klassik18 – 30Wood logs92%
PuroWIN24 – 103Wood chips93%

Which biomass boiler is best suited to your home?

Depending on the model, biomass boilers burn either wood logs, chips or pellets.

All biomass fuels must be stored onsite but wood logs will take up the most room. And because of their size, you will have to manually feed them into the boiler yourself. This is unlike automatically-fed biomass boilers that run on wood chips or pellets. Despite these downsides, fuelling your home with wood logs could potentially be completely free. As if you have access to a woodland area then you could collect wood logs yourself.

If you plan to collect wood logs yourself to use as fuel for your biomass boiler be careful when it comes to moisture content. Burning wood with high moisture content is inefficient and will leave behind more mess which will need cleaning out. On the other hand, if the moisture content is too low then the fuel will burn too quickly. This is the case for wood chips and pellets as well as logs.

Purchasing biomass fuel from a supplier will give you the confidence that the moisture content is suitable for home heating. Typically, it will sit between 25-60% and about 35% is ideal.

Take a look at the table below to find the best biomass boiler ranges depending on the biomass fuel you plan to use. Froling and Windhager are the only manufacturers to offer boilers that run on all 3 types of fuel.

Biomass FuelBest Biomass ManufacturerBest Biomass Boiler Range
Wood ChipsFrolingT4e
Wood LogsFrolingSP Dual
Wood PelletsFrolingPE1 Pellet
P4 Pellet
SP Dual
ViessmannVitoligno 300-C

Benefits of the best biomass boilers

Making the switch from a heating system powered by fossil fuels to a biomass heating system offers many benefits:

  • Highly effective heating systems that perform to efficiency levels of over 90%
  • Burning wood is a carbon-neutral process as opposed to burning gas or oil which increases the amount of carbon in the atmosphere
  • Save money on your energy bills as biomass fuels are generally cheaper than gas and oil
  • Receive payments through the Renewable Heat Incentive (RHI)

How much do the best biomass boilers cost?

The prices of the best biomass boilers begin at around £7,000 and range up to £14,000. Prices will vary based on the manufacturer, model and whether the fuel is fed into the boiler manually or automatically.

Best Biomass Boiler ManufacturersPotential Cost
Froling£8,000 – £14,000
Grant£11,000 – £12,500
Viessmann£9,000 – £10,000
Windhager£7,000 – £10,000

You’ll notice that the price of a biomass boiler is generally far higher than that of gas and oil boilers – which can potentially be installed for around £2,000. However, when turning to a renewable heating system, it’s worth looking at the long term costs involved.

Biomass fuels are generally cheaper than gas and oil – prices of which are rising by around 10% annually – and can even be free if you plan to collect logs yourself.

Fuel Used for Home HeatingAverage Tariff (p/kWh)
Electricity (standard rate)16.36
Wood chips2.6
Wood pellets3.9

The Energy Saving Trust and Selected Eco Energy.

In addition to the price of the biomass boiler itself, you will also need to consider the installation costs. And to find the best price for the installation of a new biomass boiler, we highly recommend comparing quotes.

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