Ventilation system service
and repair.
Ventilation fails quietly. Filters clog, belts slip, motors run hot, and nobody notices until the air turns stale or the plant stops dead. Gemini AMPM provides ventilation system service, maintenance and repair for commercial buildings across the UK: planned servicing that catches the failures you can predict, and reactive ventilation repair for the ones you cannot. One contract, one named engineer, no drama.
Fix it before
it fails.
Planned ventilation servicing is unglamorous, which is exactly the point. A proper ventilation system service works through the plant that actually moves your air: AHUs opened and inspected, fans checked for balance and bearing wear, filters changed before they choke, belts tensioned before they slip, coils cleaned, motors tested, control panels proven rather than glanced at. Ductwork gets inspected for contamination, leaks and damage on the same visit, so nothing waits for a separate survey. Each schedule is built around your plant and how hard the building works it.
The payback is measurable. Clean filters cut fan energy and keep indoor air quality where it should be. Well-set belts and healthy motors do not fail on the hottest week of the year. And a documented ventilation maintenance history is evidence: for landlords, insurers, auditors and anyone else who asks whether the building is being looked after. We service plant from all the major manufacturers, including Swegon, Systemair, Nuaire and Daikin.
Scoped, delivered,
evidenced.
- PPM contracts: planned ventilation maintenance built around your plant, your hours and how hard the building runs.
- AHU servicing: fans, coils, motors, bearings and belts inspected, adjusted and replaced before they let you down.
- Filter management: supply and replacement on schedule, protecting air quality and fan energy alike.
- Fault diagnostics: reactive ventilation repair with a named engineer responding within 24 hours of your call.
- Leak detection & sealing: ductwork inspected, leaks traced and sealed to restore the design airflow.
- LEV maintenance: local exhaust ventilation serviced and performance tested in line with HSE guidance.
When it breaks,
we answer.
Breakdowns do not book appointments. When ventilation stops, a named Gemini AMPM engineer responds within 24 hours, diagnosing the fault rather than restarting the plant and hoping. The failures follow a pattern: seized fan bearings, burnt-out motors, snapped or slipping belts, control faults that drop the whole system, dampers stuck where the airflow least wants them, ductwork leaks that steal the design airflow. Engineers arrive prepared for the common ventilation repairs, because the aim is a first-visit fix, not a survey followed by a second van.
Reactive work also feeds back into planning. Every ventilation repair we complete comes with a straight answer about why it happened and what would stop it happening again: sometimes a component upgrade, sometimes a maintenance frequency change, occasionally the honest news that the plant owes you nothing and replacement is cheaper. LEV systems get the same treatment, with performance testing in line with HSE expectations.
One visit feeds
the compliance file.
Ventilation servicing does not stand apart from your compliance obligations: it feeds them. The engineer servicing your AHUs is looking down the same ductwork that TR19®, the BESA standard for internal cleanliness, expects to be inspected and kept clean, and our ventilation hygiene team verifies the result against BS EN 15780 when deposit levels demand it. Spotting contamination at the service visit, rather than at an insurer’s audit, is the difference between a scheduled clean and an urgent one.
Fire dampers live in the same ducts, and BS 9999 expects them drop tested at least annually. Our fire damper testing programmes run alongside ventilation maintenance visits, so the dampers are tested by a fire-first contractor while the plant around them is serviced by the same firm. One contractor across servicing, hygiene and damper obligations means one asset register, one set of records, and no gap for a fault, or a liability, to hide in.
One standard,
every site.
For facilities managers and managing agents running more than one building, we deliver ventilation system services as a portfolio: one contract, one standard, one set of paperwork across every site. Each building gets its own asset register (every AHU, fan, filter bank and damper logged with photographs and an honest state-of-health note), and every site reports in the same format, so the estate can be compared at a glance rather than deciphered contractor by contractor.
Pricing follows the asset list, not a rate card pulled from the air: plant count, condition, access and attendance hours are what drive the cost of a ventilation maintenance contract, and a condition survey settles them before anything is signed. Faults found at a service visit are priced and repaired by the same team that found them. To move your ventilation onto one contract with one accountable team, talk to us.
The rest of the scope,
one accountable team.
Ventilation servicing rarely stands alone. Fire damper testing covers the fire safety devices living inside the ductwork we maintain, drop tested to BS 9999 by a fire-first contractor. Kitchen extract grease testing handles the one system where deposits are a fire regime of their own, measured and certificated under TR19® Grease. And where your plant includes smoke control, our AOV and smoke extract team services vents, shafts and extract fans as the life-safety equipment they are. One contractor, one set of records, no gaps between trades.
Common questions on
ventilation service & repair.
What does a ventilation system service visit cover?
The plant that moves your air, end to end. On a typical visit the engineer inspects and services AHUs, fans, motors, bearings and belts, changes or checks filters, cleans coils and condensate drains, tests control panels and sensors, and confirms dampers move freely. Ductwork is checked for contamination, leaks and damage while the panels are open. Everything is recorded against the asset register, so the visit leaves evidence, not just a signature: what was checked, what was adjusted, what needs attention and when.
How often does a ventilation system need servicing?
Twice a year is the sensible floor for most commercial systems, with quarterly filter checks where the air is dusty or the building is busy. Kitchens, manufacturing and other hard-working environments usually need more. Ductwork cleanliness runs on its own clock: BS EN 15780 recommends inspection intervals by building use, and inspection results trigger cleaning. We set frequencies from the manufacturer’s guidance and how the plant is actually used, then adjust as service history builds.
How quickly can you respond to a ventilation repair?
A named engineer, not a call queue, responds within 24 hours of your call, faster where loss of ventilation is critical. Engineers arrive prepared for the common failures (fans, motors, belts, controls and seized dampers) because the aim is a first-visit fix. Every repair comes with a written account of the failure and the fix, and if a temporary measure is needed to keep the building running, we say so plainly rather than leaving you guessing.
Does ventilation servicing cover kitchen extract systems?
The plant, yes: extract fans, motors, belts and controls sit naturally inside a ventilation servicing contract. The grease-laden ductwork they serve is a different discipline, with its own fire regime under TR19® Grease, where cleaning frequency is set by cooking hours and deposit measurements need certificating. Our kitchen extract grease testing service covers that side, and running both under one contractor means neither half gets assumed to be the other’s job.
How often should an air handling unit be serviced?
It depends on the environment, but twice a year is the sensible floor for most commercial AHUs, with quarterly filter checks where the air is dusty or the building is busy. Healthcare, kitchens and manufacturing usually need more. We set frequencies from the manufacturer’s guidance and how the plant is actually used, then adjust as service history builds. Over-servicing wastes money; under-servicing costs more: the schedule should earn its keep.
Can you take over our ventilation maintenance contract?
Easily, and it happens often. We start with a condition survey: every AHU, fan, filter bank and damper logged into an asset register with photographs and an honest state-of-health note. That becomes the baseline for a maintenance schedule and a costed remedial list, separated so you can see what is urgent and what can wait. Contract pricing follows the asset list (plant count, condition, access and attendance hours), so the quote is built on what you actually own. It is the fastest way to find out what your last contractor was not telling you.
Talk to us about
ventilation service & repair.
A named engineer, not a call centre, comes back within 24 hours. Tell us the building and what you’re dealing with, and we’ll scope it properly.