The boiler house of SANOFI AVENTIS (Romainville, Paris area), exploited by ELYO, is using 2 watertube boilers for steam production. The retrofit of the boiler No.13, natural gas fired, consisted in replacing the 2 old Fives Pillard natural gas burners by new Fives Pillard "GRC LONOxFLAM" burners, in order to reduce NOx and CO emissions.
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