Dual-fuel hot water or industrial central heating boiler

As energy prices and fuel availability can fluctuate sharply, it would be useful to be able to switch quickly from one fuel to another, so that your processes and buildings are always heated under the best possible conditions.

That is possible. With a dual-fuel hot water or industrial central heating boiler, you can easily switch between two fuels, depending on market conditions, availability or your operational preferences. This ensures a reliable heat supply and gives you more control over your energy costs and energy management.

The Callens Group designs and integrates tailor-made dual-fuel installations, fully matched to your heat demand and the energy sources available within your company.

Discuss the possibilities

When is a hot water or industrial central heating boiler with a dual-fuel burner worthwhile?

A dual-fuel installation offers the ability to use two fuels within a single boiler installation and thus gain more control over heat production.

That makes this solution particularly worthwhile for companies that want to make their energy supply more flexible without having to install multiple separate installations.

What’s more, it lets them respond better to changes in price, availability and grid capacity.

Reasons to choose a dual-fuel installation:

  • You want to be less dependent on a single fuel.
  • You have access to several available fuels on site.
  • You want to respond flexibly to energy prices.
  • You want to better protect your heat supply against supply risks.
  • You want to reduce your CO2 emissions.
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Output

up to 20 MW

Process temperature

up to 200°C

Operating pressure

0.5 to 30 barg

Efficiency

95%

Technical specifications of dual-fuel hot water or industrial central heating boilers

The configuration of a dual-fuel hot water or industrial central heating boiler is fully tailored to your heat demand, the available fuels, the required operating conditions, the required output, the desired water temperatures, and so on.

The burner installation is designed to use both fuels safely, efficiently and reliably. Depending on your operational strategy, the switch between energy sources can be done manually or fully automatically. That way you retain maximum flexibility without compromising on operational reliability.

Our experts analyze your energy supply, heat consumption and future plans to determine the most suitable dual-fuel solution. The result is an installation that not only guarantees continuous and reliable heat production but also lets you respond optimally to fluctuating energy prices, changing fuel availability and sustainability goals.

BENEFITS

Advantages of a dual-fuel hot water or industrial central heating boiler

A dual-fuel installation combines the reliability of a conventional boiler installation with the flexibility to use multiple fuels.

More flexibility

Two fuels can be used within a single installation without any changes to the hot water system.

Higher operational reliability

When one fuel is temporarily unavailable, the installation keeps running on the alternative energy source.

More control over energy costs

You can switch to the most attractive fuel based on price and availability.

Optimal use of energy streams

Companies can flexibly make use of the fuels available locally.

Ready for the energy transition

A dual-fuel installation makes it possible to work with conventional fuels today and add alternative fuels later.

Suitable for process and building heating

The hot water produced can be used for a wide range of industrial applications and heating systems.

What is the difference between a combined set-up, a dual-fuel boiler and a hybrid hot water or industrial central heating system?

These terms are often used interchangeably, but they refer to three different concepts.

A dual-fuel hot water or industrial central heating boiler:

With a dual-fuel boiler, there is one boiler with one burner that can switch automatically between two fuels, for example natural gas and biogas or natural gas and hydrogen.

A hot water or industrial central heating system in a combined set-up:

A combined set-up consists of two or more separate hot water or industrial central heating boilers that each use their own energy source and together meet the total heat demand. For example, a gas-fired boiler can be combined with a biogas boiler, a hydrogen boiler or a boiler running on liquid residual streams. Each installation retains its own function and characteristics.

A hybrid hot water or industrial central heating system:

A hybrid hot water or industrial central heating system combines different technologies within a single integrated energy system, for example a gas-fired boiler with an electric hot water or industrial central heating system. An intelligent control system automatically determines which technology is used at any given moment.

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Approuch Service N1

Maintenance of your dual-fuel hot water or industrial central heating system and 24/7 service

The Callens Group maintenance and service team makes sure your installation keeps performing at its best, even after commissioning. With an in-house team of more than 120 service and maintenance technicians, we schedule preventive maintenance in line with the legal and technical requirements of your installation.

On top of that, you can count on fast support whenever an unexpected breakdown occurs. Thanks to our 24/7 standby service, an extensive range of spare parts and the expertise of our service technicians, interventions can be carried out quickly and effectively.

After all, even the best maintained installation can malfunction or stop working unexpectedly. That is why the Callens Group offers a range of service packages, tailored to your preferred response time and level of support. So even in unforeseen situations, you are assured of the right support and maximum operational reliability.

More information about our service packages
PARTNERSHIP

Why partner with the Callens Group?

60 years of experience in EPCS projects
Independent integrator focused on customer needs
Flexible customer and project approach
Short decision-making lines and a personal approach
Unique service and maintenance support
Always close to customers with 13 locations

“Maximizing energy efficiency doesn’t start with choosing a technology, but with mapping out your specific situation.”

Projects with dual-fuel hot water or industrial central heating systems

Volvo
Thermal technology

Residual heat makes its way to the boiler room

Output2 x 12.5 MW
Operating conditions125 °C - 12 barg
<Digimax S500 / Kenox S500 / Digimax Cyber 530>
Thermal technology Hot water & industrial central heating boilers Gas-fired

Condensing central heating boilers keep transport tanks nice and clean

Output2 x 2,000 kW
Fuelnatural gas
Combustion efficiency106 %
20180327 132151
Thermal technology Hot water & industrial central heating boilers Gas-fired

Tanks at the optimum temperature

Output2,000 kg steam/h + 2 x 4,200 kg steam/h
Operating pressure12 barg
FAQ

Questions? We have the answers.

The exact combination depends on your energy supply, heat demand and business strategy. Common configurations are natural gas combined with biogas, hydrogen or liquid fuels. Other combinations are possible as well, depending on fuel availability and the technical requirements of your installation. The specialists of the Callens Group analyze your situation and advise you on the combination that is the most attractive, technically and economically. Contact us.

The switch happens automatically via the burner control. Depending on the configuration, the installation can switch based on fuel availability, energy prices, emission targets or preset operating parameters. This keeps heat production continuously available without any manual intervention.

No. A properly designed dual-fuel installation can switch without compromising the continuity of heat production. This keeps heat production stable, even when the availability of a fuel changes.

As an EPCS integrator, the Callens Group takes care of the entire process: from on-site analysis and engineering to installation and service. Find out more about the different steps in our workflow here.

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