A compact whole-house MVHR heat recovery ventilation unit in a powder-coated steel casing, shown disassembling into its components: insulated EPP shell halves, G4 and F7 filter cassettes, twin EC centrifugal fans, control PCB, counterflow heat-exchange core, condensate tray and four duct collars.
We know your ventilation from the inside out.
Servicing, repair and restoration for every major MVHR brand.
Fifteen years inside fans, filters and heat-exchange cores. If it spins, seals or filters — we have rebuilt it.
Deep-cleaned, rebalanced and airflow-tested. Most units return to factory performance in a single visit.
Book an engineer, not a guess.
London & Home Counties · 12-month repair warranty
Vantum Air — MVHR service
0%
15 yrs
on the tools
4,800+
units serviced
40+
brands supported
12 mo
repair warranty
We service every major brand
Everything an MVHR system needs
Annual servicing
Filters, core, fans and controls checked and documented once a year.
Filter replacement
Genuine-spec G4 and F7 cassettes fitted, old ones disposed of.
Core deep clean
Heat-exchange core stripped, washed and pressure-tested.
Fault diagnosis & repair
Noise, condensation, error codes — found and fixed, not guessed at.
Airflow balancing
Room-by-room commissioning to design rates, with written readings.
Upgrades & retrofit
Controls, humidity sensors and summer bypass added to older units.
Emergency callout
Unit down, water leak or burning smell — same-day response.
Landlord & HMO packages
Scheduled visits and paperwork across your whole portfolio.
What a neglected unit costs you
Mould & condensation
A clogged unit stops moving moist air. It shows up as black corners in bathrooms and bedrooms within months.
Heat loss you pay for
A fouled core stops recovering heat — the house stays warm only because your boiler quietly works harder.
Noise that creeps up
Worn bearings and unbalanced fans get louder so slowly you notice only after guests do.
What we service inside your unit
The exploded view above is not decoration — it is the checklist.
Counterflow heat-exchange core
Stripped, washed and pressure-tested — lost efficiency recovered.
Twin EC centrifugal fans
Bearings, balance and speed calibration on every service.
G4 + F7 filter cassettes
Genuine-spec replacements fitted, airflow drop measured before and after.
Control PCB
Diagnostics, sensor checks and firmware where the maker provides it.
Condensate tray & drain
Cleared, disinfected and re-sealed — the source of most leaks.
Duct collars & seals
Leak-tested and re-sealed so recovered heat stays in the system.
The difference a deep clean makes
The same heat-exchange core, one visit apart.
How a visit works
01
Book
Tell us the brand, model and symptoms — photos help.
02
Inspect
Full strip-down inspection, photographed as we go.
03
Service
Clean, repair and replace with genuine-spec parts.
04
Report
Airflow readings before and after, in writing.
Plain pricing
Demo pricing — final quote after inspection.
Service visit
from £149
- — Annual service
- — Filters included
- — Written airflow report
Full restoration
from £349
- — Strip-down deep clean
- — Core wash & pressure test
- — Rebalance to design rates
- — 12-month warranty
Care plan
£12/month
- — Annual visit included
- — Priority callout
- — Filter reminders
Certified competence
The qualifications behind every visit — held by our engineers and kept current.
F-Gas — City & Guilds 2079
Certified refrigerant handling — legal on everything from domestic splits to industrial cooling.
BPEC Domestic Ventilation
Domestic ventilation installation and commissioning, certified to Part F.
NICEIC Domestic Ventilation
Registered to sign off Part F ventilation on residential developments.
IVAC
Design-level ventilation competency beyond the domestic tier.
CIBSE Ventilation Design
Commercial ventilation design to CIBSE guidance — complex multi-zone schemes.
The engineers
Lead engineer
15 years on MVHR — started on commercial AHUs.
Diagnostics engineer
Controls, sensors and the faults nobody else finds.
Installations engineer
Retrofit and ductwork — clean routes, sealed joints.
Questions we hear weekly
How often should an MVHR unit be serviced?+
Filters every 6–12 months depending on location; a full service once a year. Units near busy roads clog faster.
Which brands do you work on?+
All major brands — Zehnder, Vent-Axia, Nuaire, Airflow, Titon, Brink, Komfovent, Systemair, Blauberg, Mitsubishi Lossnay, Paul, Domus and more.
How long does a visit take?+
A standard service takes 60–90 minutes. A full restoration with core wash is around half a day.
My unit has become noisy — is it worth repairing?+
Usually yes. Noise is most often bearings, an unbalanced fan or a clogged core — all far cheaper to fix than replacing the unit.
Do you provide reports for landlords?+
Every visit ends with a written report including airflow readings — suitable for tenancy files and building managers.
What warranty do you give?+
12 months on all repairs and fitted parts.
Know the machine, inside out
Drag to rotate — a typical compact MVHR unit
Book an engineer, not a guess.
Tell us what the unit is doing — we will tell you what it needs before we arrive.
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