Condensation on windows
Especially in bedrooms in the morning: too much moisture in the air.
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Ventilation: Installation, Maintenance and Repair of MVHR and Extract Systems
Condensation on the windows, mould in the bathroom, a musty smell or a noisy ventilation unit? We install, maintain and repair mechanical extract and heat recovery ventilation in houses, flats and commercial buildings. Quote after a visit, price given before any repair.
5,0on Google· 22 years of experience
Extract and MVHRInstallation and servicing
Filters and ductsCleaned and replaced
Price given firstBefore the work
All brandsZehnder, Renson, Brink…
Heat recovery ventilation (MVHR)
A balanced system with heat recovery, known in Belgium as system D, supplies fresh air to living rooms and extracts moist air from the kitchen, bathroom and toilet. Inside the unit, the outgoing air passes its heat to the incoming air through a heat exchanger, without the two airflows mixing.
The house stays well ventilated without losing much heat. It is the standard in new builds and deep renovations, where homes are very airtight. It also filters incoming air, which reduces fine dust and pollen.
The technician calculates the airflow per room, chooses the unit location (utility room, loft, plant room) and the duct routes. After installation he sets each valve and measures the airflows to check they match the design.
Ductwork and site work
A ventilation system succeeds or fails on its ductwork. Ducts must be short, straight and well fixed, with enough diameter, to avoid noise and pressure loss. In new builds they are laid in the screed or suspended ceiling before finishing.
In a renovation, the technician finds the most discreet routes: suspended ceilings, cupboards, loft or lowered corridors. He coordinates with the other trades on site so ducts go in at the right moment.
All penetrations are sealed airtight, and ducts in cold spaces are insulated to prevent condensation.
Mechanical extract and wet rooms
With a mechanical extract system (system C), fresh air comes in naturally through trickle vents in the windows and a fan extracts moist air from the kitchen, bathroom, toilet and utility room. It is simpler and cheaper to install than MVHR, especially in existing homes.
Demand-controlled systems adjust the airflow to humidity or CO2 in each room: more ventilation when needed, less when the house is empty, which saves energy.
For a bathroom without a window or with mould problems, the technician fits an extract valve or a standalone fan with a humidity sensor, ducted outside. He also makes sure there is a gap under the door so air can flow in.
Ventilation maintenance
A ventilation system that is not maintained soon loses its purpose. Dirty filters slow the air, fans work harder and noisier, and the system uses more electricity for less ventilation.
Maintenance covers replacing filters, cleaning the heat exchanger and fans, checking the condensate drain and cleaning the valves. Every few years duct cleaning is also recommended.
The technician then measures the airflows and rebalances the system if needed. You should replace the filters yourself a few times a year: he shows you how.
A service contract is not compulsory: you can simply ask us to come back when the next service is due, and we will note the filter references for your unit.
Ventilation for businesses and workshops
Offices, restaurants, shops and workshops have larger airflows and specific needs: kitchen extraction, meeting room ventilation, removal of dust or fumes in a workshop.
Our engineering office calculates the airflows from occupancy and activity, designs the duct network and selects the units. Our technicians then install and commission the system.
We also look after the installations with periodic maintenance, with a report for the building manager.
Signs of poor ventilation
These signs show your home is not ventilated enough.
Mould
In bathroom corners, behind furniture or on the ceiling.
Musty smell
The air is not renewed often enough.
Noisy ventilation
Dirty filters, a tired fan or airflows set wrongly.
No air at a valve
A disconnected or blocked duct, or a valve that is closed.
Why ventilate a well-insulated home?
The better insulated and airtight a home, the more important good ventilation becomes.
Remove moisture
A family produces litres of water vapour every day by cooking, showering and breathing. Without ventilation it stays indoors.
Healthy air
CO2, odours and substances from furniture and paint are removed and replaced by fresh air.
Avoid damage
Lingering moisture causes mould and damages plaster, timber and insulation.
Save energy
MVHR keeps most of the heat inside while it ventilates.
From visit to commissioning
Visit
The technician looks at the home, the existing ventilation and possible duct routes.
Quote
You receive an itemised quote with the system, ducts and duration.
Installation and balancing
Installation, airflow measurement, balancing and maintenance advice.
What our customers say
Where do we work?
We install and maintain ventilation throughout Belgium: Brussels, Flanders and Wallonia, for homes, offices and businesses.
BrusselsWalloon BrabantFlemish BrabantHainautNamur provinceLiège provinceLuxembourg provinceAntwerpEast FlandersWest FlandersLimburg
The brands we work with
Our technicians work on all brands: they install, service and repair appliances from the major manufacturers. For a new installation, we recommend the model that suits your home and budget.
We buy our equipment from all the major Belgian wholesalers and suppliers, including Facq, Van Marcke and Desco: genuine parts, quickly available.
Frequently asked questions
What is the difference between system C and system D?
With system C, fresh air comes in through trickle vents and moist air is extracted mechanically. With system D, supply and extract are both mechanical, with heat recovery.
How often should I change the filters?
Usually a few times a year, depending on the unit and surroundings. A technical service is recommended every year or two.
Can MVHR be fitted in an existing home?
Often yes, if there is room for the unit and ducts. It is easiest during a renovation. The technician looks at the options.
My ventilation is very noisy. What can I do?
Usually dirty filters, a fouled fan or airflows set too high. A service and rebalancing often solve it.
Do you service all brands?
Yes: Zehnder, Renson, Brink, Itho Daalderop, Ubbink, Helios and others.
How do I contact you?
Call 0477 03 88 98, book a slot online or request a quote via the form.
Do you fit bathroom extractor fans?
Yes, with a humidity sensor or timer, ducted to the outside.
Is ventilation compulsory?
In new builds and major renovations, regional energy performance rules require a ventilation system. In an existing home it is not always compulsory, but strongly advised once you insulate or replace windows.
Healthy air at home?
Request a quote, book a visit or call us for maintenance.