What grants are available for your ventilation works in 2025?

Why install an efficient ventilation system?

The main objective of a ventilation system is to ensure a constant renewal of indoor air, while minimizing energy losses.

Concrete advantages:

• Removal of humidity, odors, pollutants
• Reduction of mold risk
• Improvement of respiratory comfort
• Preservation of the building (prevents damage related to humidity)
• Better overall energy performance

In Belgium, a renovated home without adequate ventilation no longer meets PEB standards. This is why the Regions have provided specific grants to support these installations.

Eligible ventilation systems

The two main categories of subsidized mechanical ventilation (VMC):

• Single flow VMC: extracts stale air through extraction vents (bathrooms, toilets, kitchen)
• Double flow VMC: extracts stale air and supplies fresh air through a heat exchanger (efficiency up to 90%)

Some grants also apply to decentralized or partial systems (floor, kitchen, bathroom), provided that the installation concerns a significant part of the dwelling.

Ventilation grants in Wallonia

General conditions

• The dwelling must be located in Wallonia, built more than 15 years ago
• The housing audit is mandatory
• The installation must be carried out by an approved company
• The system must be listed on the recognized equipment list

Indicative amounts (Housing Grants 2025)

Grants can cover up to 70% of the total cost including VAT for the lowest incomes.

Technical conditions

• Recovery efficiency ≥ 78% (for double flow)
• Automatic ventilation management (modulated flow)
• Compliance with flow, airtightness, and acoustic standards
• Certification of the equipment

A system designed and installed according to the standards may be required as part of a comprehensive renovation.

Ventilation grants in Brussels (RENOLUTION)

General conditions

• Dwelling over 10 years old
• Work carried out by an approved company
• Equipment included in the list of recognized systems
• Application to be submitted before the start of the work via IRISbox

Indicative amounts (RENOLUTION 2025)

The amount depends on:

• The household income
• The type of beneficiary (occupant, landlord, co-ownership...)
• The neighborhood (bonus in areas of enhanced renovation)

Energy audit

An PEB audit is recommended to identify actual ventilation needs and check consistency with insulation, heating, etc. In Brussels, this audit can also be partially covered by a specific grant.

6% VAT on ventilation work

All ventilation installation work in a dwelling over 10 years old, if carried out by a registered professional, benefits from the reduced VAT rate of 6%, provided that:

• The building is used for housing
• The company invoices the work directly
• The client is a private individual

This rate applies to materials, labor, and travel.

Possible loans and financing

In Wallonia

• Rénopack: 0% loan for work resulting from the housing audit
• Rénoprêt: more flexible 0% loan, without mandatory audit

These two loans can finance the purchase and installation of your VMC.

In Brussels

• ECORENO Credit: subsidized loan (starting from 1.5%) offered by the Housing Fund, up to 60,000 € repayable over 30 years

These credits allow you to avoid using your savings while cumulatively obtaining regional grants.

Steps to follow

In Wallonia

1. Contact an approved housing auditor
2. Receive a renovation plan including ventilation
3. Obtain ...