ISO 21927-3-2021 PDF

Full title and description

ISO 21927-3:2021 — Smoke and heat control systems — Part 3: Specifications for powered smoke and heat exhaust ventilators. This International Standard specifies product characteristics, test and assessment methods, and conformance criteria for powered smoke and heat exhaust ventilators (including impulse/jet fans) intended for use in powered smoke and heat control ventilation systems in buildings and other construction works.

Abstract

This document defines the required performance characteristics and the test and evaluation methods for powered smoke and heat control ventilators (fans) used as part of smoke and heat control systems. It covers both conventional powered smoke and heat exhaust fans and impulse/jet fans, and specifies conformance criteria for test results used to demonstrate product suitability for smoke/heat control applications.

General information

• Status: Published
• Publication date: May 2021
• Publisher: International Organization for Standardization (ISO)
• ICS / categories: 13.220.20 (Fire protection)
• Edition / version: Edition 2 (2021)
• Number of pages: 70.

Scope

ISO 21927-3:2021 applies to powered fans intended specifically for smoke and heat control ventilation systems in buildings and construction works. The standard sets out required product characteristics, measurement and test procedures, and acceptance/conformance criteria for fans used to extract smoke and heat or to create flows for smoke control (including impulse/jet fans). It does not cover installation design in detail (which is addressed in other parts of the ISO 21927 series).

Key topics and requirements

• Defined product characteristics for powered smoke and heat exhaust ventilators (performance, temperature capability, mechanical strength and durability).
• Test methods for airflow, pressure, power consumption and performance under intended smoke/heat conditions.
• Specific requirements and test criteria for impulse/jet fans used for smoke movement and control.
• Acceptance and conformance criteria for test results and reporting requirements (marking, documentation of rated performance).
• Procedures for type-testing and for establishing ranges of approved fan performance from a limited set of tests.

Typical use and users

Used by manufacturers of smoke and heat control fans, product test laboratories, fire and life-safety engineers, HVAC and smoke-control system designers, building code authorities, and project/specification authors. The standard is referenced when specifying or verifying fans intended for smoke extraction, compartment pressurization and directed smoke movement in fire conditions.

Related standards

ISO 21927-3:2021 is part of the ISO 21927 series on smoke and heat control systems. Relevant related parts include ISO 21927-1 (smoke barriers), ISO 21927-2 (natural smoke and heat exhaust ventilators), ISO 21927-4 (natural ventilator design/installation), and other parts addressing ducts, dampers, control equipment and power output devices. The ISO/TC 21/SC 11 technical committee maintains the series.

Keywords

Smoke control, heat control, smoke exhaust, powered ventilator, smoke fan, impulse fan, jet fan, test methods, performance criteria, fire safety, ISO 21927.

FAQ

Q: What is this standard?

A: ISO 21927-3:2021 is an International Standard specifying requirements, test methods and conformance criteria for powered smoke and heat exhaust ventilators used in smoke and heat control systems.

Q: What does it cover?

A: It covers product characteristics and test/assessment methods for powered smoke and heat ventilators, including impulse/jet fans, and sets pass/fail and reporting criteria to demonstrate suitability for smoke control applications.

Q: Who typically uses it?

A: Manufacturers, testing laboratories, fire and building services engineers, system designers, and authorities having jurisdiction use this standard to specify, test and approve fans for smoke and heat control systems.

Q: Is it current or superseded?

A: ISO 21927-3:2021 is the current published edition (Edition 2, published May 2021) and replaces the earlier ISO 21927-3:2006 edition (which was withdrawn).

Q: Is it part of a series?

A: Yes — it is one part of the ISO 21927 series addressing different components and aspects of smoke and heat control systems (barriers, natural and powered ventilators, ducts, dampers, control equipment, etc.).

Q: What are the key keywords?

A: Smoke control, smoke exhaust, heat exhaust, powered ventilator, impulse fan, jet fan, performance testing, fire safety, conformance criteria, ISO 21927.