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  • BSI
    BS ISO 21927-4:2019 Smoke and heat control systems - Natural smoke and heat exhaust ventilators. Design, requirements and installation
    Edition: 2019
    $435.35
    / user per year

Description of BS ISO 21927-4:2019 2019

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.



Standard NumberBS ISO 21927-4:2019
TitleSmoke and heat control systems - Natural smoke and heat exhaust ventilators. Design, requirements and installation
StatusConfirmed
Publication Date2019-06-19
Identical National Standard OfISO 21927-4
DescriptorsFire barriers, Heat, Smoke extraction (buildings), Performance, Safety curtains, Performance testing, Fire safety, Smoke, Fire spread prevention, Fire safety in buildings, Fire-test classifications, Fire resistance, Control systems, Conformity, Thermal resistance
ICS13.220.20 Fire protection
CommitteeFSH/25
ISBN978 0 580 98896 7
PublisherBSI
Pages26

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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