Bullerjan Free Flow - The revolutionary classic

40 years ago, inventor Eric Darnell fundamentally changed the way we heat with wood with the introduction of the Free Flow. Rooms that were previously considered uneconomical to heat can now be heated quickly and evenly. The distinctive shape of the Free Flow is a prime example of functional and well thought-out design, focussed on efficiency and performance.

These unique features have made the Free Flow one of the most renowned wood-burning stoves in the world. With the development of smaller versions of the Free Flow, thousands of households of all sizes can now benefit from its exceptional heating properties.

B³ Ceramic and B³ Ceramic MAX - design meets functionality

The B³ Keramik is an elegant, functional and space-saving storage stove, available in 3.9 kW, 5 kW and 6 kW output levels. Designed by the internationally renowned designer Sebastian Herkner, this stove impresses with its handmade ceramic, which is produced in Germany and is available in numerous colour variations. The sturdy base of the B³ Keramik is made of high-quality cast iron and can optionally be extended to form a practical stove bench with a solid oak seat.

The B³ Ceramic MAX offers a variant of the B³ in solid ceramic that does without the striking cast iron elements. Here, too, the design options are virtually unlimited, allowing the stove to be perfectly adapted to individual living styles.

B4 steel, ceramic and ceramic+ - versatility meets elegant design

The B4 stove, also designed by Sebastian Herkner, impresses with a spacious combustion chamber and a large viewing window that offers a clear view of the quietly burning fire at all times. With tested output levels of 6 kW, 8 kW and 10 kW, the B4 is versatile and suitable for almost any room.

The intuitive operation and high quality workmanship are typical Bullerjan features. The B4 is available in three basic versions: steel, ceramic and ceramic+, each of which sets different visual and functional accents. In addition, there are numerous customisation options to adapt the B4 perfectly to your furnishing style.

B4 S steel, ceramic and ceramic+ - Compact and customisable

The B4 S is a compact stove that impresses with its highly efficient and clean combustion technology, achieving an efficiency of 86% with a nominal heat output of 5 kW. The B4 S offers a wide range of customisation options to fit seamlessly into any interior style.

Available in three different versions - steel, ceramic and ceramic+ - the B4 S can be customised. A wide range of ceramic glazes offers almost unlimited design options, making the B4 S not only functional but also an aesthetic highlight in your home.

Bullerjan Cook and Cook Mini - Versatile heat source for every home

The Bullerjan Cook not only offers excellent heat output, but also the option of preparing food on a large hotplate. With a rated heat output of 7 kW and an efficiency of 80%, this stove is ideal for larger rooms. The combustion chamber is lined with 6 cm thick fireclay, which enables efficient heat storage. The solid cast iron body is virtually indestructible and is backed by a 15-year guarantee. Thanks to its environmentally friendly combustion technology and tested quality, the Cook is fully certifiable.

The smaller Bullerjan Cook Mini, with a nominal heat output of 4.5 kW, is perfect for smaller rooms without compromising on functionality. It also has a hotplate and a thick fireclay lining for heat storage. The robust cast iron body and versatile customisation options make the Cook Mini a practical and durable companion in your home.

Both models offer intuitive air supply control and the high build quality that is typical of Bullerjan. The versatility and efficiency of these stoves make them an excellent choice for any home.

Wood-burning stoves in general

The wood-burning stove, also known as a wood-burning stove or wood heater, has a long and varied history spanning several centuries. Here are some important stages and developments in the history of the wood-burning stove:

Early beginnings

Antiquity and the Middle Ages:

In ancient and medieval times, open fires were used in the centre of rooms to heat and cook. These early fireplaces were inefficient as a lot of heat was lost through the open flue.

15th century:

In 1475, the world's first wood-burning stove was created, consisting of 6 iron plates welded together. The invention of this type of heating is attributed to the Danish company Rais. Despite this origin, the simply built stoves, which consisted of several iron plates arranged around a hearth, curiously became known as ‘Swedish stoves’.

Renaissance and early modern times

16th and 17th century:

The chimney was introduced to remove smoke from the house. This led to the development of the classic open fireplace. To increase efficiency, iron firebacks and simple cast iron plates were used, which can be considered early forms of wood-burning stoves.

Industrial revolution

18th century:

The Industrial Revolution brought technological advances that enabled the manufacture of cast iron stoves. In the 1740s, Benjamin Franklin developed the so-called ‘Franklin stove’, a cast-iron heating stove that was more efficient than open fireplaces.

19th century:

With the advancement of cast iron technology, stoves became more popular and affordable. These stoves offered better heat output and could be produced in many different designs. Stoves with closed chambers and adjustable air inlets were also developed, further increasing combustion efficiency.

20th century

Early 20th century:

The use of wood-burning stoves declined in many regions as centralised heating systems and alternative fuels (such as coal and oil) became more popular. Nevertheless, wood-burning stoves remained widespread in rural areas and less developed regions.

Mid to late 20th century:

In the 1970s, as the energy crisis increased awareness of renewable energy and energy conservation, wood stoves experienced a renaissance. More efficient models with better combustion technology and lower emissions were developed.

Modern developments

21st century:

Today's wood-burning stoves are sophisticated appliances with cutting-edge technology that offer high efficiency and low emissions. They are often equipped with secondary and tertiary air inlets to ensure complete combustion. Eco-friendly standards and certifications have helped to make the use of wood-burning stoves more environmentally friendly. The wood-burning stove has evolved from a simple fireplace to a sophisticated heating appliance that today not only provides warmth but is also an aesthetic feature in many homes.

Advantages of wood-burning stoves

The wood-burning stove offers several advantages over wood-burning stoves, which can also be fuelled with coal. Here are some of the most important advantages:

1. Environmental friendliness
   Renewable resource: Wood is a renewable resource, whereas coal is a fossil resource that is limited in supply and takes millions of years to form. CO₂-neutral: When wood is burnt, only as much CO₂ is released as the tree absorbed during its growth. Coal, on the other hand, releases additional CO₂ that has been stored in the ground for millions of years.
2. Emissions
   Fewer pollutants: Compared to coal, burning wood produces less sulphur dioxide (SO₂) and other harmful emissions such as mercury and arsenic. When burned, coal can release a variety of harmful substances that affect air quality.
   Reduced particulate pollution: Modern wood-burning stoves are designed to ensure efficient combustion and therefore minimise particulate emissions. Coal stoves can produce higher levels of particulate matter, which can be harmful to health.
3. Economic aspects
   Regional availability: Wood is more readily available in many regions and can be sourced locally, whereas coal often has to be imported from further afield. This can increase transport costs and the carbon footprint.
   Cost: Wood can be cheaper than coal, especially when sourced locally. The price of coal can fluctuate greatly due to transport costs and international markets.
4. Odour and storage
   Pleasant odour: Burning wood produces a pleasant, natural smell, whereas coal can produce a rather unpleasant and pungent odour.
   Storage: Wood is easier and cleaner to store than coal. Coal often leaves a dusty and dirty environment.
5. Regulatory advantages
   Stricter regulations for coal: In many regions, there are stricter regulations and requirements for the use of coal as a fuel in order to comply with environmental and health standards. Wood-burning stoves can often be more easily authorised and are subject to less stringent regulations.
6. Maintenance and cleaning
   Less ash: Wood leaves less ash compared to coal, which makes cleaning and maintaining the stove easier.
7. Regulatory advantages
   Stricter regulations for coal: In many regions, there are stricter regulations and requirements for the use of coal as a fuel in order to comply with environmental and health standards. Wood-burning stoves can often be approved more easily and are subject to less stringent regulations.
   Overall, wood-burning stoves that run solely on wood offer significant environmental, economic and practical advantages over those that can run on coal. These advantages make them an attractive option for environmentally conscious consumers and those looking for a cleaner and more efficient heating solution.