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Where does heat come from?

Actually it's only about physics.

It starts with the energy and fuel value of dry wood, which is stated at 4 kw/h per kg and the energy release process, which is better known as the actual heating.

This way about 4 to 10kg wood (or 16 to 40 kw/h energy) get lightened up.

Wood fiber changes into combustion gas and generates heat and warmth.

One part of the heat is produced in the combustion chamber of the tiled stove or the fireplace, and is thus emitted directly from the epicenter. The heating gases, which emerge in the combustion chamber and have a temperature of approx. 800°C, contain the other great part of the energy.

By using different heat exchanging devices, the temperature is detracted from these energy amounts and can thus be used as heat. The smokes gases are quickly cooled down in the ceramic stove system and are used as hot air for great heat outputs. When the heating gases are passed through a draught-canal of a mass capable of heat storage, this mass is heated up and emits a steady radiant heat for hours. Another possibility is to pass the heat gases through a vessel body which operates like a real heat exchanger in the furnace.

To use the knowledge of creating energy by using wood and combining this with all kinds of different types of systems for all individual needs is our supreme discipline.

Only a perfectly aligned wood stove system for a stove or a fireplace can provide the desired well being.

BRUNNER is known for best products with exceptional quality. All we do is to build the best combustion chambers with specially aligned warmth systems. This is what makes BRUNNER so unique. We call this expertise.  You will call it quality.


Warm air fireplace…

… with a fitted steel plate shuttering.

The hot flue gas from the combustion chamber gets cooled down in the steel cap and releases warm air. This solution is ideal when you need warm air in a small room within only a few minutes.


Accumulator - fireplace…

… with an adjoining, ceramic accumulator

The hot fuels from the combustion chamber accumulate to a hot core stream over a compact cast casing. This is the best way of heating up storage like in a tile stove. This is the ideal solution when you are planning on using a larger smokestack as a solution for radiation heating.


… with a fitted, ceramic accumulator



The hot fuels from the combustion chamber,  streams through the storage which is fitted on top of the combustion camber.

This is the ideal solution if high efficiency and a radiation heating is required on smallest area.


Kessel - fireplace

.. with attached water heat exchanger.

The hot fuels from the combustion chamber stream the kettle body, which is fitted on top of the combustion chamber.

This is the ideal solution if you don't only want a fireplace effect but also wish to support your central heating.


Hot air - tile stove

By using the hot air – tile stove your room can be heated up within minutes. This concept was constructed for a medium to high heating output (> 4 kW) like in old buildings with high ceilings.

Hot air furnaces work by streaming the compartment air through a metallic after heating mass where it heats up quickly and feed the room via hot air fences and shafts.

Correspondingly high are the power peaks of this system because the storage is only built in to the furnace shell of the fireplace. This system leads to a faster cooling of the furnace construction.

  • heats up quickly
  • adequate for large rooms
  • cools quickly



Storage tiled stove

The heat emission of the tiled stove is the most enjoyable form of heat. The concept of radiant heat is applied when a small, long-lasting and constant heat output is desired.

In the case of the storage stove, the heat is stored in the heavy ceramic heat accumulation mass and is emitted slowly through the surface of the stove. In this way, excessive power peaks and high fluctuations in temperature are avoided.

Depending on the used mass capable of heat storage, the tiled stove needs a longer heating-up time. But the heat will be emitted for several hours.


Handmade thermal energy storage

The handmade thermal energy storage represents the most original form. The right-angled heating gas channels are made of fire clay plates and form the ceramic draught system. In this way, heat is detracted from the heating gas, stored and is emitted through the surface of the tiled stove.

Modular prefabricated storage systems

In recent years, ceramic module-storage-systems have been installed many times. The advantages of prefabricated storage elements are obvious: perfectly fitting shaped pieces allow a fast construction; the smooth walls and the uniform round cross-sections have small flow resistivity. The high gross density allows a unique heat absorption and – conductivity.

  • comfortable radiated heat
  • long heat storage time


Tiled stove with boiler

A different form of heat storage is given when the heating unit is combined with a boiler. Either as water heat exchanger or as coating of the boiler, or even both integrated in a boiler body. In the case of all tiled stoves with a boiler, a large part of the usable heat quantity is passed to the buffer in the form of hot water. The heating system can revert to this temporarily stored energy.

  • generate heating water
  • generates tiled stove heat