Technically, a combi stove is a stove equipped with a “wood” type combustion chamber which integrates a pellet burner and its loading system. A flame sensor immediately detects which fuel it is and operates the stove accordingly, without any user intervention on the electronics. How do the two fuels interact? As soon as you load the logs, the stove detects an increase in temperature and then cuts off the pellet supply. This will only resume if you do not add wood and if there is actually a need to provide heat to the environment, otherwise the stove automatically goes into standby mode, then restarts as soon as there is a new demand for heat.