WiVent-B decentralised ventilation unit
Decentralised ventilation

WiVent-B decentralised ventilation unit

Technical details

  • Simple and effective: ventilating, cooling and heating with a single unit
  • Best air quality
  • Cosy indoor climate
  • CO2 sensor control


Hygiene certificate

Product details

The WiVent-B decentralised facade ventilation unit can be integrated horizontally underneath the glazed facade in a space saving manner, replacing the radiators in the process. Given that the supply and exhaust air openings are positioned at the front of the unit, the top can be fitted with a window sill. More than one of the compact and robust units can be combined to form a ventilation belt, thus saving space. Alongside mechanical ventilation, they also facilitate hybrid ventilation mode.

For everything and everyone: the WiVent-B ventilation unit is available with fronts in various colours, meaning they can easily be adapted to every room concept. The system provides architects, for example, with a great deal of freedom for integrating the WiVent-B inconspicuously into their ideas and drafts in the best possible way. Outside and in.

  • The low-turbulence displacement air flow guarantees ventilation with increased effectiveness whilst adhering to all comfort parameters.
  • The ventilation of separate rooms prevents exhaust air from being transferred from one room to the supply air of another room - no circulation air.
  • The highly efficient heat reclamation transfers the heat from the exhaust air to the supply air. The warmth thus stays in the room.
  • The windows of the room can still be used. Window contacts switch off the ventilation units when the window is open. Window ventilation remains possible.

Technical specifications

Not all of the variant values listed here can be combined with each other. Use our Wildeboer configurator to easily check the possible combinations.

Basic version
  • Master unit
  • Slave unit
  • 2000 mm
  • 800 mm
Connection position
  • Top
  • Middle
Heating and cooling unit
  • Heating
  • Heating and cooling
Heat/moisture reclamation
  • Cross-counterflow heat exchanger
  • Cross-counterflow enthalpy exchanger
Outdoor air filter
  • ISO ePM1 70%
  • ISO ePM10 50%
Exhaust air filter
  • ISO ePM10 50%
  • ISO Coarse 85%
Condensation discharge
  • Without condensation pump
  • Using condensation pump
Room control unit
  • Without room control unit
  • Analogue room control unit
  • Digital room control unit, 5 m cable
  • Digital room control unit, 10 m cable
  • Digital room control unit, 20 m cable
  • RAL 9010
  • In RAL-colour

Product pictures

Media & Downloads

User manual WiVent-B (2023-01)
User manual WiVent-B (2023-01 / DE)
Hygiene certificate WiVent (2021-08)
Operating manual analogue room control unit (2022-04 / DE)
User manual WiVent software (2023-01 / DE)
Quick Start Guide WiVent (2022-04 / DE)


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.

Contact person

For questions on decentralised ventilation