Heating with Open vs. Closed Fireplace Door

Operating the fireplace with a closed door is by far the most efficient and safe method.
Open-door burning is only permitted if the fireplace model is specifically certified for open operation and all chimney flue calculations have been tailored accordingly.
An open fireplace must never be left unattended due to the risk of flying sparks or falling embers.
Always burn dry, split firewood and avoid resin-heavy wood that crackles and sparks excessively.
Avoid using air-depleting appliances (such as a powerful kitchen extractor hood) on the same floor without active makeup air, as negative air pressure can pull smoke into living areas.

Combustion air inlets must remain open and unblocked; never modify the factory airflow settings.
During burning, all convection warm-air grilles must remain open to prevent heat entrapment around the insert.
Ensure that no combustible materials or furniture are placed within 80 cm of the front glass.
Flammable objects must also be kept at least 5 cm away from the outer casing of the fireplace structure.