MVHR Service London — Mechanical Ventilation Heat Recovery Servicing
Need an MVHR service in London? Collide Group services Mechanical Ventilation with Heat Recovery systems from £120 — filter replacement, heat exchanger clean, fan clean and full airflow rebalance. We cover every major brand including Vent-Axia, Nuaire, Titon, Zehnder, Vaillant, Brink and EnviroVent, with same-week appointments across all London boroughs.
Quick answer
An MVHR system should be serviced once a year, with filters replaced every 6–12 months. An MVHR service in London costs from £120. Collide Group is a WRAS-certified building services specialist based in Northolt, serving all of Greater London. Every MVHR service includes filter replacement, heat exchanger core clean, fan clean, condensate drain check, airflow measurement against design rates, a control and summer bypass test, and a full written report.
What Is an MVHR System?
MVHR stands for Mechanical Ventilation with Heat Recovery. It is the whole-home ventilation system fitted in most modern, airtight London flats and new-build developments. It continuously extracts stale, humid air from your kitchen, bathroom and utility room, and supplies filtered fresh air to your bedrooms and living room.
The clever part is the heat exchanger at its core: it recovers up to 90% of the heat from the air being thrown away and transfers it into the incoming fresh air — so you get constant fresh air without throwing your heating out of the window. If your flat has an HIU for heating and hot water, there is a very good chance it has an MVHR unit too, usually in a utility cupboard, ceiling void or loft.
Why MVHR Systems Need Annual Servicing
An MVHR unit runs 24 hours a day, 365 days a year — it is the hardest-working appliance in your home. Its filters trap London's dust, pollen and traffic pollution, and they steadily block up. Once airflow drops, the system stops removing moisture from your home, and the problems start quickly.
- Blocked G4, F7 and ePM1 filters choking airflow
- Condensation on windows and rising humidity
- Black mould in bathrooms, bedrooms and on cold walls
- Dust and debris fouling the heat exchanger core
- Blocked condensate drains leaking water
- Fan motors working harder and drawing more power
- Noisy operation from dirty or unbalanced fans
- Airflow drifting below Building Regulations Part F rates
What's Included in Our MVHR Service
Our engineers follow the manufacturer service schedule for your specific unit. We don't just swap the filters and leave — we clean the core, measure the airflow and confirm the system is still ventilating your home at the rate it was designed for.
- Filter inspection and replacement (G4, F7 and ePM1 grades)
- Heat exchanger core removal, clean and reseat
- Fan and impeller clean, bearing and noise check
- Condensate drain and trap check, clear and flush
- Ductwork, valve and terminal inspection
- Airflow measurement against the original design rates
- Summer bypass, boost and humidity control testing
- Full written service report with photos and recommendations
MVHR Brands We Service
Related work in London: MVHR Repair London · HIU Service London · HIU Repair London · Bulk Servicing London · All Services
Signs Your MVHR Needs Servicing
If you recognise any of these in your home, your MVHR is overdue a service:
- Windows steaming up in the morning
- Musty or stale smell that never clears
- Black mould returning after you clean it
- Bathroom staying damp long after a shower
- The unit has become noticeably louder
- Weak or no airflow from ceiling vents
- You have never had it serviced since moving in
- Filters visibly grey, furry or clogged
If the unit has actually stopped, is leaking water or is making a grinding noise, you need our MVHR repair service instead.
The Benefits
Healthier Air
Clean filters remove London traffic pollution, pollen and dust — and keep humidity low so mould and dust mites cannot take hold.
Lower Energy Bills
A clean heat exchanger recovers far more heat, and clean filters let the fans run on lower, cheaper speeds.
No Damp or Mould
Correct airflow removes moisture at source — the single most effective fix for condensation and black mould in modern flats.
MVHR Servicing for Blocks & Landlords
Damp and mould complaints are one of the biggest sources of resident dissatisfaction in modern blocks — and in most cases the root cause is an MVHR system that has never been serviced. We run block-wide MVHR servicing programmes across London with coordinated resident access, discounted per-unit rates and full compliance reporting for the whole development.
Enquire About Block ServicingMVHR Service from £120
Single-flat MVHR service from £120, including filter replacement and a full airflow check. Discounted block rates available for property managers and housing associations.
Request a Written QuoteMVHR Servicing FAQs
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Related Services
MVHR Repair
Noisy, leaking or dead MVHR unit? Fast fault diagnosis and repair.
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Annual Heat Interface Unit servicing from £120.
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Same-day HIU fault diagnosis and repair across London.
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Block-wide service contracts for property managers.
Learn moreBook Your MVHR Service
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