Natural smoke vents (NSHEV), powered smoke exhaust (PSHEV) and stairwell extraction per DIN 18232 and EN 12101. We plan, supply, install and maintain — tested, documented, insurable.
A smoke and heat exhaust system (SHEV, German: RWA) channels hot smoke and heat out of a building in a controlled way during a fire. The aim is a smoke-free layer at floor level — so people can escape, fire brigades can orient themselves and firefighting can take place. A distinction is made between natural smoke vents (NSHEV per EN 12101-2), which work by thermal buoyancy, and powered smoke exhaust (PSHEV per EN 12101-3), which uses certified fans and air ducting. A special case is stairwell SHEV to secure the first escape route, and pressurisation systems (EN 12101-6), which build up overpressure in the stairwell to prevent smoke ingress. The requirements come from the fire protection concept, the state building codes and the special building ordinances — in NRW notably the Industrial Building Guideline (IndBauR NRW), the Assembly Venue Ordinance (VStättVO) and the Sales Venue Ordinance. Every SHEV must be verified in calculation per DIN 18232-2, regularly maintained and its functional evidence documented completely — otherwise the approval lapses.
Which SHEV type is suitable depends on geometry, use and the fire protection concept. NSHEV are usually the most economical solution — provided room height and roof area are sufficient.
Smoke and heat exhaust devices in the roof or facade — working by thermal buoyancy. Typical for warehouses, logistics, production.
Fan-assisted extraction — for spaces without sufficient buoyancy, underground garages, kitchens, internal units.
Smoke vent at the top point of the stairwell — keeps the first escape route smoke-free per the Model Building Code.
Pressurised smoke protection system — active overpressure in the stairwell prevents smoke ingress. For high-rise and special buildings.
SHEV devices exist for every roof shape and building geometry. The aerodynamic effective opening area per EN 12101-2 is decisive.
Single unit on the flat roof — with upstand and motorised opening dome or flap.
Continuous rooflight band with opening segments — for large halls, production buildings, logistics.
Vertically opening facade windows or flaps — for assembly spaces, atria and lightwells.
Axial, radial or roof fan with certified temperature resistance (F200 to F600).
Motorised roof hood or louvre at the top stairwell point — code-compliant per MBO § 35.
Control and energy centre with backup power, manual call button, smoke-detector loops and window motors.
One point of contact for planning, execution and operation — no interface losses between general contractor, consulting engineer and maintenance firm.
Calculation of the aerodynamic effective area per DIN 18232-2, coordination with the fire safety expert.
D+H, Essmann, STG-Beikirch, SE Controls — all CE-compliant and EN 12101-tested.
Assembly incl. control cabling, wiring, smoke detectors and SHEV control panel. Handover with protocol.
Testing per DIN 18232-2 Annex B, defect report, retrofitting.
Replacing defective drives, panels, smoke detectors — also during operation.
24/7 on-call for faults and alarms across North Rhine-Westphalia.
Halls from 1,600 m², production plants with elevated fire load, stores with hazardous materials.
High-bay warehouses, dispatch halls, transshipment hubs — IndBauR NRW requires SHEV above certain hall areas.
Theatres, halls, convention centres with ≥ 200 visitors — VStättVO NRW.
Shopping centres and supermarkets from 2,000 m² sales area — VkVO NRW.
Parking facilities with more than 20 spaces — NRW Garage Ordinance.
Every required stairwell needs a smoke vent at its top (MBO § 35).
The range is huge — from a few thousand euros for a single rooflight dome to six-figure amounts for powered extraction in a logistics hall.
Prices are indicative, excl. planning fees and VAT. Binding after sizing calculation and site survey.
In-house sizing calculation with aerodynamic effective area — no interface to an external specialist.
Service partner of D+H, Essmann and STG-Beikirch — trained fitters with current certificates.
Service area all of NRW — short journey times in emergencies or faults.
Sizing calculation, installation protocol, log book — digital and optionally via project portal.
We accompany your project from early design through to handover. Sizing calculation, tender text, supply, installation and instruction — code-compliant per DIN 18232 and EN 12101, with full documentation for handover and subsequent operation.
06bAnnual testing and maintenance of your smoke and heat exhaust system — all smoke detectors, drives, panels and supply-air paths. Log book, defect report and an immediate offer for remediation from a single source.
Send us your building description, occupancy and drawings. We respond within one business day with an initial sizing idea and cost frame.