标准编号：ISO 21927-4:2019
中文名称：烟雾和热控制系统 第4部分：自然烟和热排气通风机 设计、要求和安装
英文名称：Smoke and heat control systems — Part 4: Natural smoke and heat exhaust ventilators — Design, requirements and installation
发布日期：2019-04
标准范围
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.
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