A legal obligation since 2009
Decree no. 2009-649 of June 9, 2009 requires that all boilers (whether fueled by natural gas, heating oil, wood or coal) with a power rating of between 4 and 400 kilowatts must be serviced annually by a qualified engineer. For new or replacement boiler installations, the first service must be carried out one year from installation completion.
As stated in article 31.6 of the Règlement Sanitaire Départemental type (RSDT), annual cleaning of boiler flues is also a legal obligation.