Smoke and heat extraction systems (SHEV systems) are an essential component of preventive fire protection. In the event of a fire, they ensure that toxic smoke gases and hot air are directed out of the building - a life-saving mechanism that secures escape and rescue routes and provides emergency services with better orientation.
What is a SHEV system and how does it work?
A SHEV system detects smoke development at an early stage and automatically opens defined smoke extraction openings in the roof or on the façade. At the same time, fresh air enters the building via air vents. This controlled air flow directs the smoke from the interior to the outside.
Typical components of a SHEV system are
- Release units (e.g. automatic fire detectors or push-button detectors),
- Drives (electric or pneumatic),
- Smoke extraction openings (such as skylight domes, louvre windows or roof flaps),
- control centers and emergency power supply.
Why are SHEV systems so important?
In most fires, the greatest danger is not the fire itself, but the smoke. Just a few breaths can be life-threatening. A functioning SHEV system
- secures escape and rescue routes,
- improves visibility for emergency services,
- minimizes heat build-up and consequential damage,
- supports effective firefighting.
SHEV systems therefore not only save lives, but also protect property and shorten response times.
Where are SHEV systems used?
SHEV systems are prescribed or strongly recommended in numerous building types - for example in:
- educational and care facilities,
- industrial halls, logistics centers and workshops,
- sales and assembly facilities,
- care facilities and hospitals.
The respective design is based on applicable building regulations, special building regulations and individual fire protection concepts.
Your advantages with CWS Fire Safety
As a comprehensive provider of preventive fire protection, CWS Fire Safety offers customized solutions for natural (NSHEV) and mechanical SHEV systems - from the initial consultation to professional installation and regular maintenance.
This is what CWS Fire Safety offers you:
- Individual planning and project planning
- Maintenance by qualified specialists
- Integration into existing fire protection concepts
- Sustainable and energy-efficient systems
Frequently asked questions
What is a SHEV system?
A SHEV system is a technical device that automatically or manually removes smoke and heat from the building in the event of a fire.
What is the difference to the ventilation system?
Ventilation systems regulate the room climate in normal operation - SHEV systems, on the other hand, are used exclusively for smoke extraction in the event of a fire.
Who is responsible for maintenance?
Regular maintenance in accordance with DIN 18232 must be carried out by qualified personnel.
Are SHEV systems required by law?
Yes - depending on the use and type of building, SHEV systems are required by law in many cases.
When is a SHEV system necessary?
A SHEV system is required if it is prescribed by the state building regulations or special building regulations. Typically, this applies to buildings with large areas, a large number of people or long escape routes - such as schools, places of assembly, shopping centers, stairwells in high-rise buildings or industrial halls. The need for this usually arises as part of the fire protection planning and approval process.
Who is allowed to install a SHEV system?
Only qualified specialist companies may plan and install SHEV systems. A sound knowledge of the applicable standards (e.g. DIN 18232), building code requirements and close coordination with the fire protection concept are important. CWS Fire Safety has appropriately certified specialist personnel for planning, installation and maintenance.