• Höfe am Brühl center ceiling

The world's largest selection of certified NSHEV

Tested quality + Certified safety

A natural smoke and heat exhaust ventilator (NSHEV) represents the interaction of all the components of a smoke extraction solution – from the window profile to the drive.

All individual parts of a defined NSHEV system require safety certificates. Since 2006, the valid EN 12101-2 standard requires that all NSHEV components are configured in compliance with the standards, and are subject to elaborate testing procedures. Solutions from D+H feature safety from the most renowned testing institutes and remain the largest selection of certified systems worldwide. This provides optimum planning reliability for all relevant projects – without additional cost.

  • Maximum planning and application reliability, confirmed by renowned testing institutes (VdS, MPA and IFI Aachen)

  • Largest range of EN 12101-2 solutions on the market

  • No additional costs for NSHEV

  • NSHEV calculations with the professional myCalc software

  • Knowledgeable contact persons with comprehensive NSHEV and SHEV expertise throughout the world, certified specialist companies in your area

  • Proven aerodynamic efficiency and calculation of geometric smoke extraction areas 

  • Save time in the planning process

A NSHEV must always be used in Europe if natural smoke extraction is required by the building code. In Germany, this is above all stipulated in the building code for special structures such as places of assembly, shops, schools, museums and hospitals. This includes proving the aerodynamic efficiency of the smoke-vent area of a NSHEV (natural smoke and heat exhaust ventilator) in accordance with EN 12101-2.

Testing of the NSHEVs is divided into various performance classes. These are indicated on the CE marking. Therefore, in the tendering processes, the specialist planners and architects in charge of the building project must select NSHEV classes that satisfy the requirements. In Germany, there are different regional requirements for wind and snow loads. The temperature resistance of the entire NSHEV must be ensured for at least 30 minutes at 300 degrees Celsius. 

In addition to having their functional safety tested, devices which are also used for everyday ventilation must be opened to the ventilation position 10,000 times. Our NSHEV solutions offer the largest selection of certified systems on the market and the guarantee that you can always offer your customers maximum safety. 

D+H has developed the perfect solution for creating an NSHEV. When we plan to launch a drive on the market, it is tested and certified in conjunction with all profile systems of common window manufacturers. They obtain the appropriate CE label and declaration of performance (DoP), which means that the sash is fully certified. You get this additional benefit for all D+H products exclusively and without additional costs.

Safety in an architectural context

Solution at Höfe am Brühl shopping mall

At the Höfe am Brühl shopping centre, a D+H smoke vent solution with certified NSHEV provides maximum safety. This solution was also designed with aesthetics in mind. The NSHEVs in the roof consist of six triangular sashes that open outwards like the petals of a flower. 

They are powered by D+H rack and pinion drives from the DXD Series. Wind deflectors ensure that smoke can escape in the event of a fire, even if it's windy. 

Accurately calculate tested drives and brackets for your NSHEV

The free D+H calculation program myCalc can be used to independently plan and calculate drives. myCalc is suitable for solutions in the areas of controlled natural ventilation (CNV) or smoke and heat exhaust ventilation (SHEV) and the use of natural smoke and heat exhaust ventilators (NSHEV) in accordance with DIN EN 12101-2. Combinations of ventilation and smoke extraction requirements can also be calculated. Feedback for each entry is provided directly in real time, and combined with the option of comparing the drives directly. Without leaving the page, all appropriate window drives and the associated values, such as pressure load diagrams, are displayed immediately. For all selected products, documents such as CAD drawings and instructions for use can be downloaded directly from myCalc.
Go to myCalc

Your efficient way to NSHEV approval according to EN 12101-2

Is an NSHEV system required by construction law? D+H determines the right natural smoke and heat exhaust ventilator for you, in compliance with standards and without breaking the bank.

Let's assume that the tender for preventive fire protection in a building requires a natural smoke and heat exhaust ventilator (NSHEV). In this case, you as the fabricator (whether you build metal components, windows or façades) are faced with the question of how you can implement this system while upholding standards and without breaking the bank. Learn how you can work out a competitive NSHEV bid for a tendered project and then implement the project and all its components. Lastly, learn what information is included in your approval in the form of a CE label.

Nicolas Grosmond

According to test standard EN 12101-2, a natural smoke and heat exhaust ventilator has to be verified for certain performance classes. Accordingly, it must go through multiple tests performed by a notified body (e.g. VdS, MPA or IFI). Implementing this is often very time-intensive for processors and requires extensive technical expertise in smoke and heat exhaust ventilation (SHEV). To ensure that you remain focussed on your core competencies, D+H and its worldwide network of certified service companies are there to assist you with this process. As a specialist in smoke extraction and ventilation, D+H Group has the expert knowledge and experience to configure the right certified natural smoke and heat exhaust ventilator for you based on the requirements profile. What does the D+H partner do to achieve this? In the myCalc calculation software developed in-house, D+H has a large selection of ready-certified NSHEVs. This means the D+H partner can enter the required technical data and performance class requirements and configure an approved system for you, consisting of window, drive, bracket and all additional components. You can then submit your SHEV bid, based on these expertly drafted documents. This bid includes the data for the window, window drives and installation solutions. No extra monitoring is needed: D+H will offer you the whole package! 

Once you have received the order for implementing the NSHEV system, you are faced with the in-depth planning of the building technology and processing. In this phase, you can also  rely on the technical expertise of D+H for preventive fire protection. As a legally responsible manufacturer, the D+H partner supports you during acceptance testing and in CE marking of your natural smoke and heat exhaust ventilator. With this marking, the D+H partner declares, as the manufacturer / distributor and in accordance with Construction Products Regulation 765/2008, that the system fulfils the technical parameters listed in the declaration of performance.

EN 12101-2 specifies what information must be included in the CE marking of a natural smoke and heat exhaust ventilator. In addition to the manufacturer information and the number of the certificate of constancy of performance, this specifically includes the performance classes confirmed during initial testing. You can obtain the CE type plate directly from your D+H service and sales partner.

CE seal and table

A possible CE label is shown below. The top line of the label states the range of application of the NSHEV and specific information about the window being used and the window drive.

1. Field of application, roof
2. Profile manufacturer, Raico
3. Casement width, 1472 mm
4. Casement height, 1523 mm
5. Drive type, rack and pinion drive
6. Power supply, 24 V

CE seal and table

The middle line provides information about which values the NSHEV is certified for in relation to the tested performance classes:

7.   Snow load classification, 1000 Pa (N/m²)
8.   Aerodynamic free opening area of the NSHEV, 1044 m²
9.   Maximum geometric opening area, 1885 m²
10. Classification of resistance to heat, 300 °C and class E for building material used
11. Classification of reliability with SHEV dual function (1000 strokes) for ventilation 10 000 strokes
12. Wind load classification, 1500 Pa (N/m²)
13. Classification of reliability at low temperatures, 0°C

CE seal and table

In the bottom line of the NSHEV approval plate, the manufacturer of the NSHEV (in this case D+H) confirms that the product satisfies the relevant European CE directives and the declaration of performance.

14. The CE marking is a marking under EU law for specific products relating to  product safety. The CE marking provides confirmation by the manufacturer that  the product conforms to the valid European directives                    
15. CPD number (the label of the NSHEV manufacturer)
16. Current valid version of EN 12101-2
17. Unique NSHEV calculation number (bottom left on the NSHEV specification)
18. Calendar week/year
19. NSHEV manufacturer, D+H
20. D+H logo

  • A world map in different shades of blue

    Do you have Questions?

    With 10 Service and Sales Companies the D+H group is perfectly aligned for your SHEV and natural ventilation solution. We are well organized beyond Europe´s borders and take our net-worked know-how precisely to where it belongs: To your object.

    Get in contact