4. Is chimney sweeping compulsory in Luxembourg? And at what frequency?
It is your responsibility to regularly maintain your chimney flue pipes, as failure to do so puts you at serious risk.
Whether or not you are obliged to get your chimney cleaned is determined by the municipality in which you live. For example, the municipality of Luxembourg City obliges its citizens to sweep their fireplaces and boilers fuelled by solid fuels at least once a year. For other flues (e.g. gas boilers), an inspection has to be carried out every 3 years.
In the case of constant use of solid fuel chimneys throughout the winter, professionals (such as Cottyn Kieffer) recommend to carry out maintenance twice a year.