ISO 21927-8:2017

Overview

ISO 21927-8:2017 specifies requirements and test references for smoke control dampers used in smoke and heat control systems and pressure differential systems. The standard covers products placed on the market and intended to operate as part of building smoke control installations, addressing construction, fire‑resistance performance, marking, installation and maintenance information. It distinguishes two categories of dampers: single‑compartment and multi‑compartment fire‑resisting smoke control dampers, and allows installation in or on ducts, walls, floors or ceilings.

Key topics and technical requirements

• Scope and product categories: Defines single‑compartment and multi‑compartment smoke control dampers and their intended system roles (pressurization, pressure relief, extraction, inerting).
• Construction and components: Requirements for damper construction, actuators and associated components (e.g., interface control units), and corrosion protection where applicable.
• Fire resistance performance:
  • Criteria include integrity, insulation, leakage and the HOT400/30 condition referenced for high temperature exposure.
  • Durability, classification and designation rules for both damper categories.
  • Specific performance expectations for single‑ and multi‑compartment applications.
• Test methods: References and prescribes tests such as ambient leakage, fire resistance (furnace tests), response delay, salt spray exposure, cycling and aerodynamic performance tests.
• Marking and documentation: Requirements for product marking and mandatory documentation covering product specification, installation and maintenance instructions.
• Limitations: The standard does not address detailed effects of corrosive/process chemicals drawn through systems.

Practical applications and users

ISO 21927-8:2017 is used to ensure reliable operation of smoke control dampers within smoke and heat exhaust ventilation (SHEVS), pressurization and smoke extraction systems in buildings. Typical applications:

• Commercial premises, shopping centres, hospitals, multi‑residential buildings
• Ductwork serving multiple fire compartments where dampers limit smoke spread
• Systems combining environmental ventilation with smoke extraction

Primary users:

• Manufacturers of smoke control dampers and actuators
• Fire safety engineers and system designers specifying smoke and heat control systems
• Test laboratories performing fire resistance and leakage testing
• Installation contractors and maintenance teams who follow documentation and marking for correct fitting and servicing
• Building owners and code authorities assessing compliance with fire safety strategies

Related standards

ISO 21927-8:2017 is intended to be read with and referenced alongside:

• EN 1366-10 (smoke control damper furnace testing)
• EN 13501‑4 (fire classification from smoke control component tests)
• ISO 10294‑1 and other EN/ISO test methods for dampers and fans
• ISO 21927 series (control equipment and power output devices)

Keywords: ISO 21927-8:2017, smoke control dampers, smoke and heat control systems, fire resistance, test methods, installation and maintenance.