Low Smoke Zero Halogen: when this acronym is used with reference to insulating and protection cables and conduits, it classifies the thermoplastic materials that emit a very low level of smoke and no halogens when exposed to high heat sources, such as a flame.
Corrugated conduits in PVC are not LSZH: in the event of a fire, PVC conduits and non-LSZH cables release chlorine and hydrochloric acid, a toxic and highly irritating gas. Polypropylene insulating conduits and LSZH cables, in contrast, do not produce harmful acids and significantly reduce the emission of toxic fumes.
Consequently, LSZH polypropylene conduits are increasingly regarded as the installation standard in many countries. Due to their safety for the public and property, they are highly recommended in buildings with a high footfall, such as hospitals, schools, care homes, etc.