🌿🔥 What Are Biomass Boilers and How to Choose the Right One

Biomass boilers, also known as pellet boilers,
are heating systems that work by combustion 🔥.
They use organic fuels such as wood pellets,
olive pits, nut shells, or wood chips 🌱.

They are considered sustainable ♻️
because their CO₂ emissions are part of a
closed carbon cycle 🔄.
Plants absorb CO₂ while growing.
When biomass is burned, the same carbon is released back into the atmosphere 🌍.

This approach is supported by official institutions 🏛️.
In Spain, the Institute for Energy Diversification and Saving (IDAE)
analyzes these systems in its technical guide on thermal biomass in buildings.

📄 IDAE Guide on Thermal Biomass Installations

🔧 Types of Biomass Boilers

There are several types of biomass boilers.
They mainly differ by fuel type,
feeding system,
burner design,
and level of automation ⚙️.

🔥 Biomass Boilers with Multi-Fuel Burners

Boilers with multi-fuel burners
can use different biofuels 🌰.
Common options include recycled wood pellets,
olive pits,
almond shells,
and wood chips.

Depending on the fuel used,
savings compared to heating oil
can reach 50% to 60% 💰.
This makes them a strong option
for large homes and buildings 🏠🏢.

🌬️ Biomass Boilers with Multiple Flue Passes

The number of flue gas passes is a key factor.
More passes mean better heat exchange 🔥➡️💧.

This reduces fuel consumption
and allows flow temperatures
between 90 °C and 110 °C 🌡️.

🤖 Automated Biomass Boilers

Automated biomass boilers
include an electronic control unit 🧠.
It manages start-up,
shutdown,
and operating temperatures.

Fuel feeding is automatic.
The system activates when temperatures drop.
This improves comfort
and reduces manual work 🛋️.

❄️ Biomass vs Heat Pumps in Cold Climates

Heat pumps perform very well in mild climates 🌬️☀️.
However, in areas with cold winters ❄️,
their efficiency decreases.

Biomass boilers
offer stable performance 🔥.
They deliver high flow temperatures
without depending on outdoor conditions.
They are ideal for traditional radiators
and high heating demand.

💰 Cost and Payback of a Biomass Boiler

The initial investment is usually
around 20% higher
than a gas or oil boiler.

Fuel costs are lower.
As a result, payback can be fast ⏱️,
especially in homes with high heating use.

📊 Indicative Price Examples

• AQA C15 pellet boiler (15 kW),
  up to 100 m² —
  €3,500 💶
• Biodrac 35 multi-fuel boiler (30 kW),
  large homes —
  €3,795 💶
• CB-28/400 biomass boiler (28 kW),
  250 kg hopper —
  €7,474 💶

🏢 Biomass Boilers for Buildings and Communities

Biomass boilers
are also used in residential buildings
and centralized systems 🏙️.

You can find more details in our article on

🔥 biomass boilers for apartment buildings
.

🧠 Which Biomass Boiler Should You Choose?

Price should not be the only factor.
Real heating needs must be evaluated.
A qualified technician should always be consulted 👷‍♂️.

In new buildings,
the required power is defined in the technical project.
This makes it easier to select
the boiler model,
hopper size,
and burner type 📐.

If you found this information useful,
feel free to share it 🔁.

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