Service · Services
Ventilation inspection: flow, humidity and EPC compliance
Independent diagnosis of your ventilation: extract-only, heat-recovery (MVHR), natural or hybrid ventilation. Flow measurement at vents, humidity control, EPC logbook check and regulatory compliance. Enforceable report within 7 days to activate ten-year liability, EPC or recourse.
280 €
from · VAT incl.
1-2 h
on site
7 days
report delivered
Wallonia
+ Brussels
expert measuring the flow of an extraction vent with an anemometer
For whom
A ventilation inspection tailored to four situations.
01
New-build owner
Noisy ventilation, insufficient flows, persistent condensation, EPC complaints after reception. Ten-year or perfect-completion qualification and recourse preparation.
02
Renovation owner
Recent MVHR installation that does not deliver. Workmanship diagnosis, vent measurements and independent technical arbitration.
03
Pre-purchase buyer
Old or suspect ventilation during a viewing. Opinion to estimate recommissioning or replacement cost, negotiate the price or set a suspensive condition.
04
Owner in dispute
Disagreement with installer after faulty installation or EPC complaints. Drafting of an enforceable report, basis for amicable or judicial proceedings.
Our method
Five steps from survey to enforceable report.
Comprehensive audit methodology: visual check of the unit and ducts, flow measurement with an anemometer, humidity control, EPC logbook verification. Compared to current NIT-CSTC and EPC requirements.
- 01Phone briefingPreliminary exchange: ventilation type, installation date, complaints (noise, condensation, odours, bills). Submission of the EPC logbook and technical sheets.
- 02On-site inspection1-2 hour visit with check of the unit, filters, ducts and vents. Flow measurement at each vent with an anemometer, humidity control.
- 03Differential diagnosisQualification: undersizing, installation defect, crushed or poorly connected ducts, fouled filters, failing balancing, EPC non-compliance. Ranking.
- 04Report drafting15-25 page document with HD photos, flow readings, legal qualification, NIT-CSTC and EPC references, and quantified rework recommendations.
- 05Recourse follow-up if neededLetter templates to the installer, home insurer, ten-year liability insurer or EPC certifier. Coordination with partner lawyer if legal action.
Deliverables
What you walk away with, concretely.
15-25 p. enforceable report
Structured document with HD photos, flow readings, legal qualification. Enforceable in insurance, conciliation or first-instance court.
Flow table
Actual measurements vent by vent compared to NIT-CSTC requirements and the EPC logbook. Centrepiece of the recourse file.
HD geolocated photos
Photo report of the unit, ducts, vents and watch-out points. Annexed to the report and usable in proceedings.
Quantified estimate
Estimated cost of rework: balancing, vent replacement, duct rework, unit replacement. Costing basis for insurance or recourse.
Letter templates
Tailored template letters: installer, home insurance, ten-year liability or EPC certifier depending on the origin identified.
30-min briefing included
Half-hour call to review the report, prioritise actions and lock in the rework or recourse strategy.
Pricing · VAT incl., all-inclusive
Three packages for your need.
Flash diagnosis
From 280 €
Visit + written opinion · 1h on site
- 1h inspection
- 3-5 page written opinion
- Flow measurement at key vents
Le + demandé
Full inspection
From 480 €
Diagnosis + enforceable report
- Everything in 'Flash diagnosis'
- 15-25 p. enforceable report
- Full vent measurement
- Quantified estimate
Inspection + recourse
From 780 €
Inspection + legal file
- Everything in 'Full inspection'
- Legal file preparation
- Partner lawyer coordination
- On-site rework follow-up
Testimonials
They entrusted us with their ventilation diagnosis.
★★★★★
« MVHR delivered without commissioning. Condensation, mould at 6 months. The report demonstrated an absence of balancing. Perfect completion activated, unit balanced and vents replaced. »
photo client
Adrien Pirard
New-build owner · Wavre
★★★★★
« Extremely noisy single-flow ventilation. Clear diagnosis: unit installed without an anti-vibration pad and undersized ducts. Full rework obtained. »
photo client
Sarah Decoster
Renovation owner · Namur
★★★★★
« 2010 apartment visited before purchase. Silent ventilation but no flow. The report priced replacement at €4,200. Purchase price adjusted accordingly. »
photo client
Jean-Marc Hubert
Pre-purchase buyer · Brussels
FAQ
Your questions about the ventilation inspection.
What is the minimum flow at an extraction vent?
Per EPC and NIT-CSTC requirements, 25 m³/h in WC, 50 m³/h in bathroom, 75 m³/h in kitchen (excluding hood). A lower flow reveals an installation defect, undersizing or fouling.
Does failing ventilation fall under ten-year liability?
Yes if it compromises the salubrity of the property (chronic condensation, mould, degraded air quality) and appears within 10 years of reception. The expert report with measurements is the centrepiece of the recourse.
Why does condensation persist despite ventilation?
Three main causes: insufficient flow (measurement with anemometer), blocked or crushed duct, or installation defect (poor balancing of air inlets and outlets). A diagnosis clearly identifies which dominates.
Can a single-flow ventilation replace a heat-recovery unit?
No for a new build subject to the EPC. The EPC logbook imposes a specific system type. Modifying the system after reception without a study causes EPC non-compliance and blocks certification.
Should a ventilation system be serviced every year?
Yes. Vent cleaning, filter replacement (heat-recovery), duct check. Lack of servicing causes 30-50% efficiency loss within 2-3 years and may be raised in case of a claim.
Are you independent from installers and brands?
Strictly. We refuse any case where we have a commercial relationship with the contractor, manufacturer or opposing expert. Our mandate comes exclusively from the owner.
Prefer email? contact@reception-provisoire.be