Tulikivi has been involved in the development of heat-retaining fireplaces for more than 20 years, during which time the company has invented several new methods and techniques, dozens of which have since been patented. For example, Tulikivi has patented a firebox combustion air technology solution, the double combustion principle used in Tulikivi bakeovens, and the single-flue system used in Tulikivi fireplace bakeovens. You won’t find these inventions in fireplaces made by any other manufacturer. Tulikivi fireplaces are manufactured in Finland, and they have been tested both by the company’s own laboratories and by well-known, independent testing facilities. Tulikivi fireplaces fulfill the requirements of the strictest emission norms in the world. Tulikivi has been awarded the ISO 9001 Quality Assurance Certificate.
Tulikivi has developed a new generation firebox. This easy-to-use firebox solution burns the energy contained in wood cleanly and efficiently, generating energy-efficient heat throughout the heating process.
All Tulikivi fireplaces are designed on the contra flow principle. In this system, the firebox gases rise into the upper combustion chamber, where they are directed into the side channels. Here the flue gases burn out, and their heat is absorbed by the soapstone mass, which then gently radiates the heat into the living space.
Place firewood loosely in the grate, making sure to leave enough space between the logs. You can place the firewood either horizontally or vertically, but it is recommended that you place the wood horizontally on the grate. There is no need to adjust the amount of combustion air while the fire is burning or when adding wood. The combustion of the new firebox is always good, regardless of how you decide to use it.
The combustion air is distributed within the firebox partly by draft control panels located in the combustion chamber and partly by the grate. Compared with traditional techniques, the air distribution ratio has been improved so that the majority of the combustion air is channeled through the draft control panels. When less combustion air is channeled through the grate, the air does not cool down the combustion process in the grate too much during the initial and final phases, which results in cleaner combustion. When adding wood, you will notice that the wood is kindled quickly. This is because the air inlets located at the ends of the grate direct the combustion air directly above the embers.
The combustion air is vigorously stirred up as it is directed into the combustion chamber through the draft control inlets. This agitation of the air assists in circulating the flue gases throughout the firebox, which causes the gases to remain in the firebox longer and thereby enhance the combustion process. The shape of the firebox, developed by Tulikivi and called a “whirl chamber”, also promotes circulation of the combustion gases and improves combustion efficiency.
Thanks to the inclination of the firebox walls towards the grate, the burning wood falls in a pile towards the center of the grate. This helps keep combustion temperatures high and the combustion process clean.
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