ISO 21927-2:2018

Smoke and heat control systems — Part 2: Specifications for natural smoke and heat exhaust ventilators

This document applies to natural smoke and heat exhaust ventilators (NSHEV) operating as part of smoke and heat exhaust systems (SHEVS), placed on the market. This document specifies requirements and gives test methods for natural smoke and heat exhaust ventilators which are intended to be installed in smoke and heat control systems in buildings.

Systèmes de contrôle de fumée et de chaleur — Partie 2: Spécifications pour les dispositifs d'évacuation naturelle des fumées et de la chaleur

General Information

• Status: Published
• Publication Date: 27-Nov-2018
• ICS: 13.220.20 - Fire protection
• Technical Committee: ISO/TC 21/SC 11 - Smoke and heat control systems and components
• Drafting Committee: ISO/TC 21/SC 11 - Smoke and heat control systems and components
• Current Stage: 9060 - Close of review
• Start Date: 04-Jun-2029

Relations

• Revises: ISO 21927-2:2006 - Smoke and heat control systems — Part 2: Specification for natural smoke and heat exhaust ventilators
• Effective Date: 19-Mar-2016
• Revises: ISO 21927-2:2006/Amd 1:2010 - Smoke and heat control systems — Part 2: Specification for natural smoke and heat exhaust ventilators — Amendment 1
• Effective Date: 19-Mar-2016

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 21927-2
Second edition
2018-11
Smoke and heat control systems —
Part 2:
Specifications for natural smoke and
heat exhaust ventilators
Systèmes de contrôle de fumée et de chaleur —
Partie 2: Spécifications pour les dispositifs d'évacuation naturelle des
fumées et de la chaleur
Reference number
ISO 21927-2:2018(E)
©
ISO 2018

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ISO 21927-2:2018(E)

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ii © ISO 2018 – All rights reserved

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ISO 21927-2:2018(E)

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and abbreviated terms . 4
5 Requirements . 5
5.1 Nominal activation conditions/sensitivity . 5
5.1.1 Initiation device . 5
5.1.2 Opening mechanism . 6
5.1.3 Inputs and outputs . 6
5.2 Response delay (response time) . 6
5.2.1 Reliability . 6
5.2.2 Opening under (snow/wind) load . 6
5.2.3 Low ambient temperature . 7
5.2.4 Opening under heat . 7
5.3 Operational reliability . 7
5.4 Effectiveness of smoke/hot gas extraction (aerodynamic free area) . 7
5.5 Performance parameters under fire conditions . 7
5.5.1 Resistance to heat .
...