Questions and answers

FAQ - Fire protection and smoke extraction

The 92 series fire dampers are maintenance-free. Due to their design and the materials used, such as the complete encapsulation of the actuator mechanics, the thermal release device, the motorized actuators, etc., they can do without ongoing maintenance work to maintain their function. Periodic lubrication, for example, is not required. Maintenance is thus limited to functional checks (triggering and reopening of the fire dampers) or repair measures in the event of damage. Hygienic cleaning must be carried out as part of the overall cleaning of the ventilation and air-conditioning system or as required. 

Due to the fact that the system is maintenance-free, functional checks may also be carried out remotely. This can be carried out particularly easily and economically via the Wildeboer BS2 communication system for fire dampers with automatic calendar control.

For this purpose, the shut-off damper blade of the fire damper must be closed and opened again. The fire damper can be equipped with different release devices or with electric spring return motors for opening and closing.

For the function test, the manual release must be operated or a remote release must be performed to close the shut-off damper blade of the fire damper. Afterwards, the shut-off damper blade must be opened again.

The respective commissioning and function control measures as well as notes on operation are described in the operating instructions.

You can find our operating instructions in the download area.

When it comes to the functioning and operation of fire dampers in accordance with DIN EN 15650, there are several specifications and obligations that must be complied with. We have summarized the essentials in a document that you can view and download here.

If the fire damper cannot be opened, the fusible link sleeve or the thermoelectric fusible link must be checked for integrity. These must be in proper condition and must not show any damage. Refer to the respective operating instructions for the design and replacement.

In addition, no installed parts may obstruct or block the damper blade freewheeling.

If these measures do not work, please contact our technical support.

You will find our operating instructions in the download area.

A minimum distance to adjacent walls and ceilings is not required when installing square fire dampers from Wildeboer Bauteile GmbH. Only a small distance is required for the round fire damper FR90.

The corresponding specifications can be found in the respective user manuals.

Yes. The FK90 and FR90 fire dampers have a certificate of conformity for use in explosion-proof areas. They are available with mechanical release device or electric spring return motor.

We have summarized details on the handling of fire dampers with asbestos-containing building materials for you in this document (german).

No. The fire dampers each have two inspection openings. These allow a view into the interior of the fire damper, on both sides of the damper blade. Inspection openings can be ordered as an option for the FK90 fire damper. These do not replace openings of corresponding size, which must be provided for cleaning purposes based on relevant standards and guidelines.

Yes, the AMP connectors can be removed.

Yes. The fire dampers are equipped with an electric spring return motor or a thermal-mechanical release device (TMA) at the factory. A fire damper equipped with a TMA at the factory can be retrofitted with a spring return motor. Complete actuator units for the particular damper type are required for the retrofit. These include the motor console, the spring return motor and the electric fusible link.

Yes, it is possible to retrofit a limit position switch for both the open and closed positions of the fire damper. Spring return motors have both limit switches as standard.

An elastic connector, also called an expansion compensator or canvas connector, is suitable for installation between a ventilation duct and components of a ventilation system, e.g. a fire damper. It can absorb changes in the length of the connected duct, burn off in the event of a fire and thus prevent the transmission of force from the ventilation duct to the fire damper.

FK90, FR90 (FR92 and FR92K series) and FK90K fire dampers are CE marked construction products according to the harmonized product standard DIN EN 15650. They can be connected on one or both sides to ventilation ducts made of non-combustible or combustible building materials. In the event of fire, thermal expansion of these ducts must not exert any significant forces on the fire damper. Compensatory measures must be provided in accordance with local requirements. In Germany, the "Guideline on Fire Protection Requirements for Ventilation Systems", or "Ventilation System Guideline - LüAR" for short, contains building code requirements for implementation and necessity. In general, compensation is achieved by suitable pipe routing. There is no general requirement for the use of flexible connectors. 

In addition, when using the FK90 fire damper for commercial kitchens, the specifications of the general building inspection approval Z41.3-670 must be observed. Ventilation ducts made of galvanized or stainless steel must be connected. For the installation of the ventilation duct and limitation of forces, the above-mentioned guideline must also be referred to.

In addition, ventilation ducts on FK90 fire dampers for commercial kitchens are in accordance with the building authority approval

  • in metal stud walls 
  • in walls made of gypsum wallboards 

via suitable elastic connectors (expansion compensators) made of combustible building materials, at least building material class B2 according to DIN 4102-1. An expansion allowance of ≥ 100 mm in the installed state is required.

On 01 July 2013, the European Construction Products Regulation (CPD, No. 305/2011) came into full force in all EU member states after a transitional period and replaced the Construction Products Directive (CPD, No. 89/106/EEC).

Newly produced fire dampers that fall under the harmonized product standard EN 15650 must already be marked with the CE conformity mark since 01 September 2012. Since July 01, 2013, the manufacturer has also been required to submit a declaration of performance (DoP). He thus assumes responsibility for the conformity of the fire damper with the declared performance. The declarations of performance are available for:

As a result, Deutsches Institut für Bautechnik (DIBt) may no longer issue or extend general building inspectorate approvals (abZ) for fire dampers that fall under the harmonized product standard EN 15650 and must therefore bear a CE marking. They may no longer be required as proof of usability for national construction projects.

The information required for installation and assembly is fully described in the comprehensive user manuals.

Overflow openings ensure the flow of air between two nearby rooms, e.g. for the ventilation of interior corridors and rooms or for air supply. If overflow openings are provided in fire-resistant walls or ceilings, it must be possible to close them properly. Fire dampers with a smoke release device without connection to a ventilation duct are used here. In the event of a fire, they close the opening and thus prevent the spread of fire and smoke. With the FK90 and FR90 fire damper in combination with OR4 or the OR32 smoke release device, Wildeboer offers solutions with the necessary general type approval from the German Institute for Building Technology, which is required for use in Germany.

FAQ - WiVent decentralised ventilation

Thanks to the changeover flap [1], ventilation can either take place across the entire width of the appliance or via a reduced outlet cross-section. This means that the air is either distributed with low momentum and low flow velocity or with high momentum and far into the room.
In addition to heat recovery, there is a water-led heating coil [2], which provides sufficient heating even on cold winter days and thus even replaces the radiator. 
The water-led cooling coil [3] is optional and ensures a pleasant room climate on hot summer days.

For a large part of the year, heat recovery is completely sufficient to optimise the temperature of the fresh outside air without additional heating energy. For this purpose, the bypass [5] regulates the supply air temperature to the ideal level.
The WiVent-B is equipped with the latest fan technology [6], which is characterised by infinitely variable control and EC motor technology [6] with backward curved blades for maximum efficiency.

To maximise well-being, the air flows out across the entire width of the appliance [4] and slows down after leaving the appliance. The information obtained from separate room air sensors is used to control the air flow rate as required. The CO2 concentration serves as a control parameter for the room air quality.

WiVent-B is very easy to configure, parameterise, operate and monitor.  Analogue or digital room control units, as well as web-based visualisation via PC, tablet or smartphone, make controlling the WiVent-B a pleasure. Schedules in the form of typical daily and weekly sequences can also be flexibly customised.

The modular design allows easy access to all components once the appliance has been opened. This means that all surfaces and airways can be visually inspected without any problems. If necessary, the completely hygienic design enables quick and easy cleaning.

The WiVent software provides various operating modes for flexible organisation of ventilation operation. Many operating modes allow scheduling with regard to typical daily and weekly sequences. In addition, all operating modes can be customised to the needs of the user via parameters. 
Absence times can also be set up by the day and to the minute. This is possible by using Microsoft Excel tables. For example, the decentralised ventilation system can be set differently for holiday periods. All tables for the holidays of the German federal states can be found in our Wildeboer download area in the "Information material" section.

The rooms to be ventilated should have a connection to the facade so that outside and exhaust air can pass through. For optimal ventilation of the room, enough space for installation should be considered and a room depth of 8 m should not be exceeded.

Ventilation of the room via the windows is possible at any time. Window contacts can be used for this purpose, which switch off the ventilation unit as soon as the window is opened. As soon as the window is closed again, the ventilation operation restarts automatically.

The installation of a room control unit is not mandatory, but recommended, as this allows the individual needs of the user to be addressed on site. In addition, it is of course also possible to make these adjustments via the web interface.

FAQ - Environmental Product Declaration (EPD)

An EPD (Environmental Product Declaration) is a Type III environmental product declaration according to EN 15804, ISO 14025 and ISO 14044. It describes the energy and resource consumption as well as the emissions into the environment of a building product. The consideration preferably covers the entire life cycle of the product, from "cradle to grave", i.e. from raw material extraction to recycling.

According to the Construction Products Regulation, construction works should be built and used sustainably. EPDs are to be used for the assessment of the sustainable use of resources and the impact of construction works on the environment. For products that are installed in sustainable buildings, the EPD of the product is also used to assess the building, e.g. for certification (DGNB, BNB, LEED, ...).

Examples of our reference properties already certified according to DGNB can be found here.

With EN 15804, a standard for a uniform assessment for the preparation of an EPD was created.

A life cycle assessment by a life cycle assessor recognised by the IBU is required. The IBU (Institut Bauen und Umwelt e.V.) is the programme holder for EPDs in Germany and carries out the verification of the EPD.

An EPD has already been issued for the following fire protection and smoke extraction products:

An EPD has already been issued for the following air distribution products:

The prerequisite is a product group rule (PCR) of the IBU as a basic document. This was developed for fire dampers, smoke dampers and volume flow controllers and limiters by the IBU and Wildeboer Bauteile GmbH.

The EPDs contain the energy and ecological data under consideration of the entire life cycle including the high flexibility in use and maintenance-free operation.

The EPDs of Wildeboer products can be downloaded at:

Furthermore, the data from the EPDs of Wildeboer products are available at:

  • ÖKOBAUDAT (information portal for sustainable building of the Federal Ministry for the Environment, Nature Conservation, Building and Nuclear Safety) (...)
  • DGNB Navigator (product database of the German Sustainable Building Council) (...)