Smoke and heat control systems - Specification for powered smoke and heat exhaust ventilators Ingestion-build-44680 Many of these defects are

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Smoke and heat control systems - Specification for powered smoke and heat exhaust ventilators Ingestion-build-44680 Many of these defects areThis European standard specifies requirements and gives methods for testing powered smoke and heat exhaust ventilators that are intended to be installed as part of a powered smoke and heat exhaust ventilation system. It also provides a procedure for approving a range of powered smoke and heat exhaust ventilators and their motors, from a limited number of tests.