What is ISO 21927-4 - Smoke and heat control systems about?
ISO 21927 is an International Standard on smoke and heat control systems (SHCS). The main objective of ISO 21927 is to establish safety equipment and systems that plays a positive role in a fire emergency.
ISO 21927-4 is the fourth part in the multi-series that 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-story buildings.
ISO 21927-4 also applies to spaces in which NSHEVs are installed in external walls.
ISO 21927-4 includes tables and calculation methods for the design of clear layers in order to comply with the requirements of various protection objectives.
ISO 21927-4 includes information and provisions to be taken into account when applying the design rules set out herein and when installing NSHEVs
Who is ISO 21927-4 - Smoke and heat control systems for?
ISO 21927-4 on smoke and heat control systems is relevant to:
- Manufacturers and designers of smoke and heat exhaust ventilators
- Manufacturers and designers of smoke and heat control-related equipment
- Product design engineers
- Fire safety department
Why should you use ISO 21927-4- Smoke and heat control systems?
Smoke and heat control systems (SHCS) create and maintain smoke free areas in a construction works by controlling smoke flow and thus improve the conditions for the safe escape and/or rescue of people and animals and the protection of property and permit the fire to be fought while still in its early stages.
Smoke and heat control systems in compliance with ISO 21927-4 can help:
- Keep escape and access routes free from smoke
- Facilitate firefighting operations
- Delay and/or prevent flashover and thus full development of a fire
- Protect equipment and furnishings
- Reduce thermal effects on structural components during a fire
- Reduce damage due to thermal decomposition products and hot gases
For these benefits to be obtained, it is essential that smoke and heat exhaust ventilators operate fully and reliably whenever called upon to do so during their installed life. In this regard, ISO 21927-4 can be your one-stop guide to establishing an efficient, safe and high-quality SHCS, that can contribute to the success of fire protection and rescue services.