Mechanical ventilation unit
CWL-400 Excellent

The classic solution for larger detached houses.

The CWL-400 Excellent is a central ventilation unit that continuously extracts stale air from your kitchen, bathroom and other rooms and simultaneously introduces fresh, filtered outdoor air into the building.

This unit has a special feature – it uses countercurrent technology. Supply and extract air are routed past each other in separate ducts, causing the warmer extract air to heat the supply air. This saves energy while also enabling an even, continuous air supply.

A further benefit of this technology is that the consistent exchange of air also evens out the humidity in your rooms, thereby significantly improving ambient conditions. This saves on energy costs and ensures a healthy indoor environment. The CWL-400 Excellent is characterised by a lightweight and compact design and, with a maximum air handling rate of 400 m3 of air per hour, is specifically configured for larger detached houses.

  • Specification

The classic solution for larger detached houses.

The CWL-400 Excellent provides central, controlled ventilation with heat recovery. This means that stale air is continuously extracted from your living space, while at the same time fresh, filtered and preheated outdoor air is introduced into the building.

  • Clean, pollen-free, fresh and healthy air – good for allergy sufferers
  • Very high heat recovery rate and power saving EC fans reduce your energy and electricity costs
  • Quick and straightforward maintenance prevents stress and saves both time and money
  • The automatic frost stat control with preheating coil integrated as standard offers reliable and convenient protection against the heat exchanger freezing up
  • Electric reheating coil optionally available
  • The CWL-400 Excellent is of course passive house certified and approved by the DIBt (Deutsches Institut für Bautechnik)
  • Also available as CWL-180 Excellent with 180 m3/h and CWL-300 Excellent with 300 m3/h air handling rate. 
technical drawing
Model / Performance
  • CWL-400 Excellent
Please choose model
Mechanical ventilation unit CWL-400 Excellent
Model type CWL-400 Excellent


Air handling rate in qm³/h


General Info

Installation type


Application area

Central ventilation unit x
Decentralised ventilation unit -

Living space

Up to 150 m² -
Up to 250 m² x
Up to 300 m² x

Installation location

Wall x
Ceiling -

Combination with

Wall mounted gas boiler -
Oil condensing -
Heat pump -

Passive cooling with night air


Active air heating via preheating coil (type, in watts)

elektrisch, ... kW

Ready for humidity and CO2 sensor


Size / weight

Height (mm) 765
Width (mm) 677
Depth (mm) 564



G4 coarse dust filters


F7 pollen and spore filters


WOLF SmartSet Ready


wiButler ready

Ab Q4 2016


Healthy, pollen-free air throughout the house ensures a good indoor environment that benefits everyone, especially allergy sufferers.

We spend around two-thirds of our lifetime in closed rooms. Dust, pollen, odours, a high CO2 level or excessive humidity can negatively affect physical and mental performance. In well insulated buildings, there is also a double layer of thermal insulation and triple glazed windows to consider. Whilst this is extremely energy saving, it also means that your home is difficult to ventilate. In older buildings that have been renovated, this can lead to the formation of mould and moisture-related damage.

A WOLF comfort mechanical ventilation unit is perfect for situations such as these. It automatically ensures the indoor air is fresh and healthy without time consuming and inefficient airing in short bursts. With a controlled mechanical ventilation unit, pollen doesn't stand a chance, so you can finally take a deep breath and relax. Dust and dust mites can also be actively prevented with a ventilation system, resulting in significantly improved air quality. Therefore be sure to include a WOLF comfort mechanical ventilation unit when planning your new build – for a healthy and pleasant indoor environment.

Whether you're looking at heating, ventilation or cooling

Whether you're looking at heating, ventilation or cooling – at WOLF we are only satisfied when all these elements come together to provide you with an indoor environment where you can truly relax. We want technology to fit around you, not the other way round.
And because your requirements may change over time, we offer you full control of your heating system, DHW temperature and air change rates with our user friendly devices, intuitive apps, and SmartHome enabled programming units –so your living zone is also your comfort zone.


Kaum etwas ist für Ihr Wohlbefinden so wichtig wie das optimale Raumklima. Genießen Sie diese neue Lebensqualität und registrieren Sie sich online für unsere 5 Jahre Garantie.

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