Combustion requires plenty of air

Before starting the fire, check that there is enough combustion air and flue draught. You can check if a cold fireplace has sufficient draught by opening the fireplace door slightly and lighting a match. If the flame does not turn towards the fire chamber, there is not enough draught in the flue. In that case, remove the soot hatch and heat the flue using for example a hot-air gun or by burning newspaper.

Wood needs plenty of air to burn. Place the wood in the fire chamber so that the air needed for combustion can flow freely around the wood. The right placement and amount of wood can be found in the product-specific instructions for use. For starting the fire, use smaller wood with a diameter of 3–5 cm (for cookers, max. 3 cm). Place the wood in a loose arrangement and add enough kindling in between and on top of the wood. Torn and wrinkled newspaper makes for the best kindling.

Do not use lighter fluid to start the fire.

Please note! You must always light the wood at the bottom in the NunnaUuni soapstone fireplaces.

Lighting the wood at the bottom suits the burning method developed by NunnaUuni the best. The Golden Fire burning method is based on the precise direction of air, which ensures that exactly the right amount of air is used in the different phases of burning.

Thanks to the Golden Fire-method the wood is gasified, and burns constantly at a high, even temperature of 800–1,200 degrees Celsius throughout the burning process. The high burning temperature both improves the energy efficiency of the fireplace and reduces harmful particle emissions.

Always read the instructions for your own fireplace carefully and follow its instructions on how to start the fire.

Fast burning of the embers makes heating more efficient

Wood is added after approximately one-half of the previous amount of wood has burned down. Now the wood can be a larger diameter of 8–10 cm (in cookers, 5–8 cm). Follow the maximum amounts of wood and heating times stated in the fireplace-specific instructions for use.

Make sure that the draught is suitable throughout the heating. If there is not enough draught or combustion air, soot and carbon deposits accumulate inside smoke ducts and flues. Carbon deposits reduce the heat storage capacity and they also create a fire safety hazard. The draught is right when wood burns evenly with a steady roar and a bright flame.

Keep the fireplace door closed during heating. Do not leave the wood burning without supervision.
The ember phase begins when one-half of the wood that was added last has burnt down. Heating is the most efficient when the embers burn quickly. Combustion is accelerated when you increase the amount of air flowing into the embers by adjusting the fireplace or if you stoke the embers.

When the embers burn, dangerous carbon monoxide is generated. Only close the flue damper after the embers have burned down and are no longer glowing.

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