Natural smoke extraction system (NRA system)

Natural smoke exhaust system - advice, installation & maintenance

Natural smoke extraction systems (NSHS) are installed in the exterior walls and ceilings of buildings. The toxic smoke and heat that quickly build up during a fire and are hazardous to health are safely discharged through exhaust vents.

How a natural smoke ventilation system works

The natural smoke extraction system uses the natural forces of the thermal buoyancy principle. Hot smoke and heat rise upwards and are discharged through an opening (skylight, heat exhaust window). At the same time, fresh air is introduced through lower openings (windows, doors). This pushes out the smoke and creates a natural air flow. The natural smoke extraction system is triggered either automatically by smoke detectors or manually by emergency release buttons.

Location of natural smoke ventilation systems

Typical locations for natural smoke extraction systems are stairwells, shopping centres, exhibition halls, sports stadiums, industrial buildings, and production or storage halls.

Additional benefits of a natural smoke extraction system

Natural smoke extraction systems with electric drives can also be used as ventilation systems. Fresh outside air can flow into the room through smoke extraction openings or flaps in the rooms concerned and the stale or polluted air can be extracted.

Maintenance of a natural smoke extraction system

The natural smoke extraction system must be serviced once a year by a competent person. In addition, the operator must carry out a visual inspection once a year. 

All-round carefree package: We advise you, install natural smoke extraction systems and prepare everything for acceptance by an expert. Once the natural smoke extraction system is in operation, we will gladly take care of the annual maintenance for you. Ask for a non-binding offer.