Fireplace stoves are suitable for continuous operation around the clock, although the refueling interval is shorter. For a nominal heat output of 4 kW, you can expect to use 1 kg of dry firewood. Using this formula, you can calculate the amount in kg that can be loaded at once for all nominal heat outputs. Refueling is done only after the wood has burned down. This method also makes traditional fireplace stoves suitable for continuous operation without cooling down. These stoves are optimized for burning wood but can also be loaded with briquettes to maintain embers. The firebox is insulated against intense heat with vermiculite plates. A well-designed air supply system ensures optimal combustion. Primary and secondary air contribute to a high efficiency, while the additional post-combustion air (tertiary air) ensures low emissions, and the pre-warmed glass cleaning air (secondary air) guarantees a clean viewing window. The heat output from the fireplace stoves is an optimal combination of radiation and convection. The radiation provides a pleasant warmth for the human body, while convection warms the room air, distributing it evenly throughout the space. The side and rear convection jacket, along with additional steel fins, enable intense heat output and also ensure better structural stability.