The NF/GS seal for flue less (mobile) paraffin heaters is described in the norm NF – D 35.300 issued by AFNOR and the subsequently updated directive NF 128. Adherence to the various safety regulations is monitored both by the renowned French inspection institute LNE (Laboratoire National des Essais) and EUROVENT - CERTITA in Paris. Paraffin heaters compliant with the NF/GS requirements are permitted to carry the specific seal of approval. In addition, the exact specifications that the fuel must meet are described in a French legal decree (Arrêté 25-06-2010). If a fuel meets the product specification set by this norm, it is suitable for all makes of heater because the EUROVENT-CERTITA / LNE adheres to this norm when issuing its NF/GS seal for heaters. As well as having the correct fuel specification, it is important that the product is measured out correctly and that the logistical process guarantees the quality until delivery to the consumer, without the risk of contamination by water or other harmful substances