Why choose Avenir Renovations?
Why ventilate your home?
Ventilation is not a luxury, it is a requirement in any modern home. It ensures the salubrity of indoor air, essential for your health and that of your building.
Improve air quality
We spend more than 80% of our time indoors. A good ventilation system allows for renewal of polluted air (CO₂, humidity, VOCs, cooking fumes, dust mites), prevents allergies, and ensures healthier breathing on a daily basis.
Prevent humidity and mold
An effective ventilation system regulates the humidity level in sensitive rooms (bathroom, kitchen, laundry room). This avoids condensation on walls and windows, black spots, stagnant odors, and protects insulating materials.
Reduce heat loss
Unlike passive ventilation, modern ventilation systems recover heat from the extracted air, allowing you to ventilate without cooling your home. In energy renovation, ventilation is therefore a key lever to limit losses.
The different ventilation systems
The choice of technology depends on your type of housing, existing insulation, and your comfort and energy performance goals.
Where to install ventilation in the home?
An effective installation involves ventilating each functional area according to its needs:
- Extraction in humid rooms: kitchen, bathroom, laundry room, toilet
- Supply or air intake in living areas: living room, bedrooms, office
- Discreet networks integrated into attics, false ceilings, or technical partitions
Our installers adapt the configuration to your habitat, whether you are in a detached house, apartment, or collective building.
What is the price of an installed ventilation system in Belgium?
The cost depends on the type of system, the complexity of the project, the area to be covered, and the necessary technical arrangements.
Factors influencing the price
- Type of ventilation (single flow, double flow, humidity-regulating)
- Surface area of the housing (m²) and number of outlets
- Additional work (false ceilings, drilling, electrical supply)
- Accessories (filters, decorative grilles, acoustic boxes)
- Level of control (manual, automatic, connected)
Average prices in Belgium
| Type of ventilation system | Average price including tax (supply + installation) |
| Hygro-regulatable single flow ventilation | 2,000 to 3,500 € |
| Standard double flow ventilation | 4,500 to 6,500 € |
| High efficiency double flow ventilation (90% +) | 6,500 to 9,000 € |
| Installation in existing housing | Additional 500 to 1,500 € |
| Maintenance and filter replacement (annual) | 100 to 250 € |
Each project is subject to a custom quote, after a free technical visit.
Why choose Avenir Rénovations Belgium?
Trusting our team means benefiting from:
- Advice on choosing the most suitable system
- Dimensioning study according to your configuration
- Careful installation by certified technicians
- Flow adjustments and balancing
- Training on system usage
- Maintenance follow-up and filter replacement
Integration into an energy renovation project
In a high-performance renovation, ventilation is as important as insulation. Indeed, a well-insulated house that is poorly ventilated quickly becomes damp, uncomfortable, and unhealthy.
Installing a mechanical ventilation system, especially a dual-flow system, allows you to:
- Avoid overheating or drafts
- Retain heat in winter
- Improve summer comfort
- Stabilize indoor air quality
This is an essential step to improve the energy performance of the building.
What assistance is available in Belgium for installing a ventilation system?
Regional grants may be awarded as part of a comprehensive energy renovation project, especially for high-efficiency dual-flow ventilation.
- Wallonia: Housing Grant (via housing audit)
- Brussels: Renovation Grant (mechanical ventilation category)
- Flanders: Mijn Verbouwpremie (under certain conditions)
Our advisors will assist you in maximizing this installation in your grant application and provide you with all the required documents.
Request your free quote for a ventilation system
Do you want to improve the air quality, thermal performance, and indoor comfort of your home? Contact Avenir Rénovations Belgium for a personalized study and an installation that meets energy renovation standards.
Make an appointment today for a free technical visit and receive your detailed quote, with no obligation.
FAQ – Ventilation and Energy Renovation in Belgium
Is a ventilation system mandatory in an energy renovation?
Yes. In Belgium, any significant energy renovation (insulation, window replacement, air tightness...) must include a compliant ventilation system. Indeed, the more airtight the building is, the more essential air renewal becomes to prevent humidity, mold, and indoor pollutants. A high-performance ventilation system is therefore essential to ensure comfort, health, and energy performance compliance.
What is the difference between single-flow and double-flow ventilation?
- Single-flow ventilation: extracts stale air through vents in humid rooms, while fresh air enters naturally through the windows. It is cost-effective and easy to install, but results in heat loss.
- Double-flow ventilation: extracts stale air and supplies fresh air through a motorized network. It recovers heat from outgoing air to preheat incoming air. This is the most efficient solution for energy renovation.
Does ventilation qualify for a renovation grant?
Yes, under certain conditions. In Belgium, the installation of a ventilation system, particularly a double-flow system with heat recovery, can entitle you to regional assistance if:
- It is integrated into a comprehensive energy renovation project
- The system is installed by a certified professional
- The performance is validated by an audit or technical sheet
Available grants include:
- Prime Habitation (Wallonia)
- Renolution (Brussels)
- Mijn Verbouwpremie (Flanders)
Avenir Rénovations Belgium assists you in the preparation of your file.
What maintenance is required for mechanical ventilation?
To ensure optimal operation, it is recommended to:
- Clean the extraction and supply vents every 6 months
- Change the filters (in the case of a double-flow system) 1 to 2 times a year
- Check the extraction unit and ducts every 2 to 3 years
An annual maintenance contract can be offered to secure the longevity of the system.
Does ventilation increase energy consumption?
On the contrary. A well-designed system, particularly a double-flow ventilation, recovers up to 90% of the heat from outgoing air, which reduces heating needs. Moreover, a controlled air quality contributes to better comfort without over-ventilation or unnecessary losses.
