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ISO 21927-4:2019

Current Revision

Smoke and heat control systems - Part 4: Natural smoke and heat exhaust ventilators - Design, requirements and installation

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This document applies to the design and installation of natural smoke and heat exhaust ventilators (NSHEVs) for spaces from which smoke is extracted vertically by thermal buoyancy via the roof in the case of single-storey buildings and via the uppermost storey in the case of multi-storey buildings. It also applies to spaces in which NSHEVs are installed in external walls.

This document includes tables and calculation methods for the design of clear layers in order to comply with the requirements of various protection objectives.

This document includes information and provisions to be taken into account when applying the design rules set out herein and when installing NSHEVs.


SDO ISO: International Organization for Standardization
Document Number ISO 21927
Publication Date Not Available
Language en - English
Page Count
Revision Level
Supercedes
Committee ISO/TC 21/SC 11
Publish Date Document Id Type View
Not Available ISO 21927-4:2019 Revision