Intervals for Plants Checks (acc. to 1st BImSchV)
In case the commissioning/modernization of a heating plant has taken place 12 years ago or longer, so the 1st BImSchV check must take place every two years. In case it is shorter than 12 years, so the check has to take place every three years. As long as the combustion process calibrates itself and is continuously adjusted, a check every 5 years is sufficient. The exact intervals are set by the empowered chimney-sweep plant-related in the plant report.