Servicing your Duco ventilation
Duco is a Belgian manufacturer found in many homes and flats built or renovated over the last fifteen years. It makes DucoBox extract units and DucoBox Energy heat-recovery units.
We service both: unit, fan, extract valves and, on a heat-recovery unit, filters, exchanger and condensate drain.
The Duco units we service
DucoBox (extract only)
Extraction in kitchen, bathroom and toilets.
DucoBox Energy Comfort (D325, D400)
Common heat-recovery unit.
DucoBox Energy Comfort Plus (D350, D450, D550)
More recent generation.
DucoBox Energy Premium
Top of the heat-recovery range.
Independent of the brand
What matters on a Duco
Demand-control sensors
Many Duco systems set the airflow room by room from humidity or CO2. A dirty sensor or a blocked valve and the room is no longer ventilated. We clean them and check that they respond.
The window vents
With an extract-only system, fresh air comes in through the window vents. Closed or clogged, they choke the whole system. We look at them with you.
Duco-size filters
Each DucoBox Energy takes its own filter sizes. We note the exact reference.
What this service costs
One price per system, published before you book, with no questionnaire to fill in to get it. Anything out of the ordinary (a lot of valves, an unreachable unit, a system never opened) we tell you before the visit, never on the invoice.
Extract ventilation service
System C: mechanical extract from wet rooms, façade vents for supply.
€139
Heat-recovery ventilation service
System D: filtered fresh air to living spaces, with heat recovery.
€159
Prices exclude VAT. 6 % on servicing in a private home over ten years old, 21 % otherwise.
What the service includes
Unit and heat exchanger cleaning
Casing stripped down, impellers de-dusted, plate or rotary exchanger cleaned, condensate tray and drain checked.
Valves, optional
15 €, ticked when you book. Extract and supply valves removed, cleaned and refitted without altering their original setting, a frequently missed detail that unbalances the whole system.
Airflow measurement, optional
Room-by-room measurement with a flow meter, added for 20 € when you book. Readings are compared with the design flow rates (NBN D50-001) and recorded in the report: that is what reveals an anomaly and confirms the system is doing its job.
Electrical and mechanical checks
Motor, bearings, direction of rotation, humidity and CO₂ sensors where fitted, and the controls (switch, remote, home automation).
Service report
A written document covering the condition found, the parts replaced, our recommendations, and the measured airflow if you took the option. Useful for a building manager, a landlord or a future sale.
Prefer to change the filters yourself between services? Our catalogue lists the filters that fit each Duco model.
Frequently asked questions
My DucoBox is noisier than it used to be, is that normal?
Most often a dirty fan or a clogged valve forces the unit to spin faster. A service fixes most cases; if a part is needed, we tell you before.
Do I need a Duco-approved installer?
Servicing a ventilation system is not restricted to the brand's installers. If your unit is still under warranty, check its terms: some require regular, documented servicing. Our written service report is there for that.
How often should a Duco be serviced?
Manufacturers generally recommend a filter check every 3 to 6 months and a full service once a year. After a first visit, we tell you the realistic interval for your system.