Most disappointing ventilation systems do not have a hardware problem — they have a design problem. Over-long flexible ducts, right-angle bends, a unit sitting above a bedroom, airflow never balanced. The equipment was fine; the design was missing.
So we start by calculating. Room areas, required flow rates under NBN D50-001, duct routing, pressure losses, expected noise levels. You receive that study before signing anything.
We install mechanical extract systems (C, including demand-controlled) and heat-recovery systems (D, MVHR), in renovation and new build, in houses and apartments alike.
Ventilation and EPB
What the service covers
Design and sizing
Room-by-room flow rates to NBN D50-001, equipment selection, duct routing on plan, predicted noise level in bedrooms.
Ductwork
Rigid or smooth semi-rigid preferred, flexible runs kept short, bend radii respected. This is what determines final acoustic comfort.
Unit installation
Location chosen for maintenance access, noise control and duct length. Anti-vibration decoupling as standard.
Valves and grilles
Adjustable valves, transfer grilles under doors or over them, outdoor intake and discharge properly separated.
Balancing and commissioning
Flow rates set with a flow meter until design values are reached, in both directions on an MVHR system.
Handover pack
Duct layout, measured flow rates, filter references, manuals and a maintenance schedule. Anyone can work on it after us.
How the visit works
- 1
Technical survey
Room measurements, review of possible duct routes, constraints in ceilings, lofts and service shafts.
- 2
Design and detailed quote
Calculated flow rates, proposed equipment with references, routing and price. Options priced separately.
- 3
Ductwork installation
Ducts, manifolds, access hatches. Hatches go in from the start — that is what makes future maintenance possible.
- 4
Connections and commissioning
Electrical work, controls, balancing, final readings.
- 5
Walkthrough
We show you how to change filters, set speeds and recognise abnormal operation.
Frequently asked questions
Heat recovery or extract only?
Heat recovery reclaims warmth from extracted air and filters incoming air: it makes sense in an air-tight, well-insulated building and where outdoor air quality is a concern. Extract-only is simpler, cheaper and easier to fit in a light renovation. The choice depends on air-tightness, the space available for ducts and your budget — we price both.
Can MVHR be retrofitted?
Yes, but the ductwork is the main constraint: two ducts must reach every room. In apartments this usually means dropped ceilings in circulation areas. We check feasibility during the survey before proposing anything.
Is MVHR noisy?
A properly designed installation is very discreet in bedrooms. Noise comes from a poorly decoupled unit, undersized ducts with excessive air velocity, or missing silencers. All three are dealt with at design stage, not afterwards.
Are there grants for installation?
Regional energy-renovation grants exist in Belgium and their conditions change regularly. We promise no figure: we tell you which body to consult for your region and supply the technical documents your application needs.
Available across all the municipalities we cover
Service areas
- Anderlecht
- Braine-l'Alleud
- Brussels
- Etterbeek
- Forest
- Ixelles
- Leuven
- Ottignies-Louvain-la-Neuve
- Schaerbeek
- Tervuren
- Uccle
- Vilvoorde
- Waterloo
- Wavre
- Woluwe-Saint-Lambert
- Zaventem
Related services
- Ventilation maintenanceA serviced ventilation system uses less energy, runs quieter and actually removes the moisture from your home.
- Duct cleaningCleaning the valves achieves nothing if the ductwork behind them is fouled. We treat the duct along its full length.
- Ventilation repairDiagnosis first, repair second. We only replace a unit when that is genuinely the right call.
A question about this service?
Describe your system: we tell you whether this service is the right answer to your situation, or whether something else is needed.