WOLF living space ventilation

Central ventilation systems

Low energy costs, lots of fresh air

Ventilation is indispensable but can waste a whole lot of heating energy. This is where a central ventilation system can help. Read on to find out more about the benefits of central ventilation and what you need to know before buying a system.

01. What is central mechanical ventilation?

Central ventilation systems constantly ensure an optimum exchange of air in your home. Fans bring fresh air into every room and discharge the stale, damp air to the outside. The process is perfectly controlled throughout the entire house by a single central appliance.

Central ventilation systems are an essential component in new, energy-efficient buildings and can also be a worthwhile investment when renovating older buildings.

02. The benefits of central ventilation

Modern central mechanical ventilation systems supply fresh air to all rooms without wasting heat. A system of this kind will also provide you with the following additional benefits.

Save costs


Saves heating costs

Central ventilation systems with heat recovery use heat from the extract air to warm the supply air. This reduces thermal ventilation losses by around 98% and accordingly lowers your heating bills enormously. Read more

Low operating costs

Modern ventilation systems only use very little power to run their fans, and the savings made on heating far exceed the cost of electricity. Additional operating costs include regular filter changes. The ventilation ducts generally only need cleaning every 15 years or so.  Read more

Bad air

Healthy living

Prevent mould

Central ventilation systems continuously provide the optimum amount of fresh air and channel excess moisture outside. With a central ventilation system, you will never again have to worry about mould in your home. Read more

Removes allergens

It is not only mould that can seriously damage our health. Dust and other particles in the air can also be problematic, and pollen in the air is harmful to people with allergies. The air filters in central ventilation units keep all these substances outside. Only clean air is brought into the building. Read more

Noise protection

Central mechanical ventilation provides huge advantages, particularly in densely populated, urban residential areas. After all, you don’t need to open your windows and be bothered by all the outside noise.

Happy family on the couch

Easy to use

Ventilation improves comfort

Central ventilation handles the air exchange in your house completely automatically. You don’t have to give it a minute’s thought and can use your time for other things. You can even rely on the appliance to supply you with healthy air at night when you need it the most to promote restful sleep and when air quality is usually at its worst.  Read more

Gentle cooling in summer

During the summer, central ventilation units can use the cool nights to lower the indoor temperature of rooms that heated up during the day. A combination of a ventilation system and a heat pump with an integrated cooling function can be used to handle greater cooling requirements. Read more

Ventilation systems from WOLF

WOLF Living space ventilation CWL-2

CWL-2 mechanical ventilation unit

The CWL-2 is the most efficient and quietest of the central WOLF residential ventilation systems, as well as the most compact of its kind on the market.

Living space ventilation CWL-T-Excellent

CWL-T-Excellent mechanical ventilation unit

The CWL-T-300 Excellent central ventilation system from WOLF is particularly slim. It can either be used on its own - or harmonises perfectly with your heating system in the central building services unit.

WOLF Living space ventilation CWL-F-Excellent

CWL-F-Excellent mechanical ventilation unit

With its flat design, the CWL-F Excellent living space ventilation system from WOLF is ideal for demanding installation situations with difficult space conditions.

03. The drawbacks of central ventilation

Consider the following points before choosing a system of this kind.

Central mechanical ventilation systems are not cheap to buy, but you will quickly recoup the purchasing price thanks to the savings you will make on heating costs.


The only significant disadvantage of central ventilation is the complexity of installation. In new buildings, even this is unimportant as air duct routing can be easily managed by sound design and planning.

It is a different story if you want to retrofit a central ventilation system in an older building. In this case, you should consider whether decentralised ventilation may be the better choice for you.

Woman at the window

04. Checklist for central mechanical ventilation

You have chosen your ventilation system. But have you thought about these points?

A central ventilation system cannot work properly if large volumes of air are simultaneously escaping through leaky windows and doors. Whether you are building a new home or renovating an older building, it is therefore important to ensure that the house is airtight.

The fans of ventilation units make noise, so it is important to select a quiet appliance.

When choosing a ventilation system, you should also check the technical components, such as silencers and acoustic decoupling.

When installing a central ventilation system, you must consider how it will affect and be affected by other appliances. For instance, extractor hoods in a kitchen must only be used in recirculation mode. You will need special equipment to route cooking fumes to the outside.

When installing central ventilation, it is vital to fulfil fire protection regulations.

A mains power switch must also be included so that the ventilation system can be safely disconnected from the power supply for maintenance purposes or in the event of a fault.

If you retrofit a central ventilation system, you can take advantage of lucrative state subsidies.

Funding is also available for installing central ventilation systems in new buildings in many cases. It is worth finding out.

Answers to your questions about central ventilation systems

  • You should check the filters in ventilation systems after three months and have them changed after six months. The filter change indicator will also show when this is necessary. It is best to employ a specialist company to maintain your system.

  • Naturally, you can air your rooms manually if you wish to, but it is not at all necessary. In the colder seasons, you will also be wasting heating energy if you open your windows regularly.

  • Absolutely, if the stove has a balanced flue. If the stove has a conventional flue, consult your chimney sweep.

CWL-2 domestic ventilation in the basement

Our recommendation: The mechanical ventilation CWL-2

50 years of experience have gone into the development and design of our top seller in the residential ventilation sector.