AHU Services
AHU Servicing in London & the M25
Planned AHU servicing covering filters, fans, coils, dampers, drainage and controls, with air volumes and set points verified at handover. We cover ahu servicing for homeowners, landlords, managing agents and commercial sites across every London borough and the wider M25. Engineer time is £120+VAT per hour with a one hour minimum, and parts are always quoted in writing before they are fitted.
Quick answer
Who provides ahu servicing in London, and what does it cost?
London HVAC Pro provides ahu servicing in London and the M25 using F-Gas certified engineers. Engineer time is £120+VAT per hour with a one hour minimum and no call-out fee, parts are quoted in writing before fitting, and same-day attendance is usually available. Call 07427 826446 to book.
More answers: faults and causes, service costs, areas we cover.
AHU Servicing explained
Planned AHU servicing covering filters, fans, coils, dampers, drainage and controls, with air volumes and set points verified at handover.
- Filter change and gauge reset: Filter condition can restrict airflow; cleaning and replacement requirements depend on the filter specification.
- Fan, belt and bearing inspection: Operation, mechanical condition and control demand must be separated before condemning the drive.
- Coil clean and condition check: Condition and airflow affect heat transfer; look beyond surface appearance to obstruction and operating performance.
- Damper and actuator operation: Check movement, control command and the effect on flow together; the actuator and valve body can fail independently.
- Drain, tray and hygiene check: Confirm where condensate should discharge and whether the obstruction, pump or drainage arrangement is responsible.
- Air volume and set point verification: Confirm the component identity and model-specific requirements before deciding whether adjustment, testing or replacement is appropriate.
Interpreting the reported fault
Inspect filters, belts or direct drives, dampers, coils and control response. Airflow limitations may be mechanical or arise from the control strategy.
- Reported symptom: a planned service due, dirty filters or falling supply air volumes
- Record when the problem started and any recent changes
- Keep fault codes and model details for the assessment
Maintenance is not a breakdown repair
A planned visit should establish condition and identify deterioration. An existing fault may need separate diagnosis and parts. Agree which assets, cleaning tasks, functional checks and records are included, and base the interval on manufacturer guidance and operating conditions.
- Provide the unit model, symptoms, filter records and safe access arrangements. Explain whether the issue is noise, reduced flow, temperature or loss of extract.
Labour and the work to be agreed
Engineer time is £120+VAT per hour with a one hour minimum. The time and materials required depend on the diagnosed fault and access. Ask for the repair scope, any additional parts and the return-to-service checks before proceeding.
- £120+VAT per hour, one hour minimum
- Confirm the parts and labour required for the specific fault
AHU Servicing across London
Air handling and ventilation concern delivered airflow as well as fan operation. A motor running does not establish adequate supply or extract at the occupied space.
Fan upgrades need the required duty and compatibility checked. Replacing a motor alone will not correct excessive system resistance, failed dampers or an unsuitable operating schedule.
Provide the unit model, symptoms, filter records and safe access arrangements. Explain whether the issue is noise, reduced flow, temperature or loss of extract.
Related ahu services services
These faults often appear together — each service has its own page with costs and what we check.
AHU Repair
The usual trigger for a call is noise, vibration, no supply air or a unit tripping out. Other signs worth acti…
AHU Fan Replacement
The usual trigger for a call is a failed fan, bearing collapse or a unit due an EC fan upgrade. Other signs wo…
AHU Belt Replacement
The usual trigger for a call is belt squeal, dust in the unit or reduced airflow from slipping drives. Other s…
AHU Bearing Replacement
The usual trigger for a call is rumbling, vibration or a fan shaft that has developed play. Other signs worth …
AHU Filter Replacement
The usual trigger for a call is high filter pressure alarms, dust carry-over or an overdue filter change. Othe…
AHU Frost Coil Fault
The usual trigger for a call is frost stat trips in cold weather or fear of a burst coil overnight. Other sign…
AHU Cooling Coil Repair
The usual trigger for a call is poor cooling, water carry-over or a fouled chilled water coil. Other signs wor…
AHU Actuator Replacement
The usual trigger for a call is a damper or valve stuck in position with no drive from the controller. Other s…
See every service on our plumbing and mechanical services index, or read about underfloor heating repair London.
Book ahu servicing in London
Tell us what the system is doing and we will send an engineer with the right parts. £120+VAT per hour, one hour minimum.
Call 07427 826446Frequently Asked Questions
Engineer labour from £120 + VAT per hour, with a 1-hour minimum. Parts and materials are quoted separately before work begins.
What's included in AHU Servicing
- Condition inspection of each listed asset
- Cleaning tasks agreed for the equipment type
- Functional checks of controls and safety devices
- Readings recorded against the previous visit
- Written findings, with any repairs quoted separately
- Refrigerant handling by F-Gas certified engineers, with records kept
How AHU Servicing works
- 1
Agree the asset list
Tell us which units are included and how they are used.
- 2
Set the interval
Visit frequency is based on manufacturer guidance and operating conditions.
- 3
Planned visit
The engineer inspects, cleans and tests each listed asset.
- 4
Findings
Readings and defects are recorded; repairs are quoted separately.
- 5
Follow-up
Agreed remedial work is booked, and the next visit is scheduled.
AHU Servicing prices
| Item | Price |
|---|---|
| Engineer labour | £120 + VAT per hour |
| Minimum charge | One hour |
| Parts and materials | Written quote before work starts |
| Planned maintenance contract | Quoted per asset list |
See all rates on our prices page or read why customers choose us.
AHU Servicing: scope, checks and next steps
Planned AHU servicing covering filters, fans, coils, dampers, drainage and controls, with air volumes and set points verified at handover.
What the reported symptom tells us
a planned service due, dirty filters or falling supply air volumes. Record when this occurs, what changed beforehand and whether other equipment is affected. These observations narrow the investigation; they do not prove which part has failed.
Air handling and ventilation concern delivered airflow as well as fan operation. A motor running does not establish adequate supply or extract at the occupied space.
Separate the possible causes
Inspect filters, belts or direct drives, dampers, coils and control response. Airflow limitations may be mechanical or arise from the control strategy.
Repair or replacement?
Fan upgrades need the required duty and compatibility checked. Replacing a motor alone will not correct excessive system resistance, failed dampers or an unsuitable operating schedule.
Maintenance is not a breakdown repair
A planned visit should establish condition and identify deterioration. An existing fault may need separate diagnosis and parts. Agree which assets, cleaning tasks, functional checks and records are included, and base the interval on manufacturer guidance and operating conditions.
What each check helps establish
- Filter change and gauge reset
- Filter condition can restrict airflow; cleaning and replacement requirements depend on the filter specification.
- Fan, belt and bearing inspection
- Operation, mechanical condition and control demand must be separated before condemning the drive.
- Coil clean and condition check
- Condition and airflow affect heat transfer; look beyond surface appearance to obstruction and operating performance.
- Damper and actuator operation
- Check movement, control command and the effect on flow together; the actuator and valve body can fail independently.
- Drain, tray and hygiene check
- Confirm where condensate should discharge and whether the obstruction, pump or drainage arrangement is responsible.
- Air volume and set point verification
- Confirm the component identity and model-specific requirements before deciding whether adjustment, testing or replacement is appropriate.
Details to include with your job request
Provide the unit model, symptoms, filter records and safe access arrangements. Explain whether the issue is noise, reduced flow, temperature or loss of extract.