Ventilation system replacement: from old box to fresh air throughout Flanders

An outdated ventilation system can make your indoor air unhealthy and your energy bill unnecessarily high. Watch out for these signs:

• The fan makes more noise than usual
• Your ventilation box is older than 12 years
• There is a musty smell or you have condensation on the windows
• You notice the ventilation is less powerful

On average, a mechanical ventilation system lasts 10 to 15 years. However, we recommend not waiting until it actually breaks down. Modern systems are much more energy-efficient and quieter. They automatically adjust based on humidity or CO₂, increasing your comfort without you having to think about it.

What are my options when replacing?

There are different types of ventilation systems available. The choice depends on your home and budget:

Replace ventilation box: Just swap the old box for a new, more efficient model. It's often done in one day and immediately improves your energy consumption and noise level. Ideal if your ducts are still in good condition.

Full upgrade to system C or D: System C mechanically extracts stale air and lets fresh air in through vents. System D does both mechanically and recovers heat. This requires more modifications, but delivers the highest comfort and lowest energy costs. Want to know more about which ventilation system suits you?

What does it cost to replace a ventilation system?

The price varies. A simple replacement of the ventilation box starts around €500, including installation. For a system D with heat recovery, the costs are higher. The exact price depends on the chosen unit, the accessibility of your installation and any additional work on ducts. Our installers will visit you free of charge to assess the situation and provide a precise quote. That way you'll never face surprises.

Why choose a local installer in Flanders?

Every home is different. A certified installer from your region knows the typical Flemish building styles and knows exactly how to optimally adjust your ventilation. Our craftsmen take the time to explain how the system works and why they make certain choices. You get personalised advice, not a sales pitch. Moreover, we schedule installation quickly, often within two weeks of your approval.

How does the replacement work in practice?

1. On-site appointment: Our installer comes to your home, inspects the old installation and discusses the options.
2. Tailor-made quote: You receive a clear quotation, including labour and materials.
3. Installation: On an agreed day we replace your system. We work cleanly and ensure everything works perfectly.
4. Explanation and aftercare: We explain the operation and remain available for questions afterwards.

Curious about the possibilities for your home? Request your quote now and we'll ensure a fresh start.

This is how you get the most out of your new ventilation system

After replacement, you naturally want your installation to perform at its best for years. So here are some tips:

• Have your ventilation ducts cleaned regularly, every 4 to 5 years to prevent dirt accumulation from harming air quality.
• Replace the filters of your ventilation box according to the manufacturer's instructions (usually annually).
• Use the sensors wisely: set your system to automatically react to humidity or CO₂, then you don't have to think about it anymore.

Read more about maintaining your ventilation system in our comprehensive guide.

Common mistakes when replacing a ventilation system

Over the years, we've noticed that these things often go wrong:

• Choosing a ventilation box that is too cheap and not suitable for your home; it often makes noise and uses unnecessary electricity.
• Tinkering with the electricity or ducts yourself; this not only poses a risk but can also void the warranty.
• Not taking into account the airtightness of your home when upgrading to system D; that requires a good balance.

Our installers think along with you and avoid these pitfalls. You get a system that fits, now and in the future.

Ventilation and Flemish regulations: what to consider?

When renovating or replacing, you have to deal with Flemish ventilation requirements. Since 2006, ventilation has been mandatory in new construction, and for major renovations you must also meet certain standards. By immediately choosing an energy-efficient system that meets the latest requirements, you are ready for the future. Our experts know the ventilation standards in Flanders inside out and ensure your installation complies.