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Smoke and heat ventilation systems

Consulting, installation and maintenance for SHEV systems Germany-wide.

SHEV systems are often mandatory

Smoke and heat extraction systems, also called SHEV systems, are required by the building regulations of the federal states, fire protection concepts, insurance requirements and building permits.

SHEV systems are necessary in buildings that require a low-smoke or smoke-free layer in case of fire. Smoke extraction systems divert smoke from the building so that escape and rescue routes remain usable and people can get out into the open.

Selection of smoke extraction systems

From consulting to maintenance: CWS offers an all-round service for SHEV systems.

All-round service for your smoke extraction system

Protecting people

SHEV systems enable the use of escape and rescue routes by quickly dissipating smoke and heat.

Annual maintenance

With a maintenance contract, the annual maintenance of the SHEV system is carried out automatically.


The CWS experts provide competent advice and consult fire protection experts if necessary.

Comprehensive service

CWS is a one-stop shop for SHEV service: consulting, planning, installation, maintenance and servicing.

Selection of the smoke extraction system

The choice of a smoke extraction system depends on the area to be protected as well as the existing roof, window and façade area. For the specific determination, the installer uses geometric and aerodynamic parameters, the room height and the necessary low-smoke layer. In addition, several influencing variables are taken into account in the calculation so that the SHEVS system optimally fulfils its purpose.

The specialist planners at CWS Fire Safety provide support with their expertise in planning the optimal smoke ventilation system. Request a quote now.

Installation of smoke extraction systems

We install SHEV systems according to the requirement. The components of a SHEVS include:  Control centre with emergency power supply, triggering devices, opening units and piping systems. In addition, we support the connection of the SHEVS to other fire protection systems such as the fire alarm or sprinkler system.

The CWS fire protection experts supply everything from a single source and prepare the smoke ventilation system for successful expert approval.

Interested in a SHEV system? The CWS experts will advise you without obligation.

Maintenance of smoke extractors

After successful acceptance, we coordinate regular maintenance and testing. SHEV systems must be serviced once a year in accordance with DIN 18232 and VdS/CEA Guideline 4020. We recommend shorter intervals in dust-laden operating facilities.

Testing in accordance with TPrüfVO is mandatory for smoke ventilation systems and takes place every 3 - 6 years (depending on the federal state). To ensure proper operation, we check the release devices, controls, openings, power supply lines and accessories of the smoke and heat extraction system for proper functioning and operational readiness.

Our experts maintain SHEV systems from various manufacturers.

Service for SHEV systems from various manufacturers

We distribute products from various manufacturers:

  • Aumüller
  • Börner
  • BTR
  • D+H Mechatronic
  • Eternit
  • GEZE
  • Greschalux
  • Jet
  • Lamilux
  • Simon
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Questions and answers about SHEV systems

What is a SHEV system?

SHEVS is the abbreviation for smoke and heat extraction systems, which are designed to remove smoke from the building as quickly as possible in the event of a fire. They primarily serve to protect people by keeping escape and rescue routes smoke-free.

When is a SHEV system necessary?

A smoke and heat extraction system is useful for stairwells, lift shafts, large production halls and warehouses, hotels, shopping centres or safety-relevant interior rooms. The specific necessity of smoke and heat extraction systems is regulated by the federal states in their respective building codes. A smoke and heat ventilation system is often required for buildings with stairwells and a height of more than seven metres. In addition, a smoke and heat ventilation system is always required for stairwells in special buildings, e.g. event and sales venues.

What types of SHEV systems are there?

There are different types of smoke and heat ventilation systems. Basically, a distinction is made between natural and mechanical smoke extraction systems as well as smoke protection pressure systems. The natural smoke extraction system uses the thermal lift principle by means of a skylight dome on the roof, which is opened automatically or manually. In contrast, a mechanical smoke extraction system uses fans, among other things, to remove the toxic smoke via ventilation pipes and to introduce fresh air at the same time. Smoke protection pressure systems, for example, keep stairwells smoke-free by means of overpressure. 

Who is allowed to install SHEV systems?

The installation of a SHEV system requires special knowledge. Therefore, SHEV systems should only be installed by qualified specialist companies with the appropriate expertise. Various manufacturers offer training courses for this purpose. At the same time, certification as a recognised installer company for SHE systems according to VdS or BHE is advantageous.

CWS Fire Safety is a certified specialist company for SHEV systems from various manufacturers. Get in touch with us.


Do you have questions about smoke and heat extraction systems?

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