In short
Commercial ventilation services cover the maintenance, repair and installation of systems that supply fresh air and extract stale air in commercial buildings. That includes supply and extract fans, heat recovery units, ductwork, grilles, dampers and controls. Engineers check airflow, fans, belts, filters and controls so occupied spaces receive adequate fresh air efficiently, as workplace regulations require.
What ventilation services involve
- fan inspection, belt and bearing checks, and motor checks
- filter checks and replacement
- heat recovery unit inspection and cleaning
- damper and actuator operation
- airflow measurement at key terminals where required
- controls checks, including time schedules, speed control and CO2 sensors
When ventilation work is needed
- occupants complain of stuffy, stale or humid air
- fans are noisy, vibrating or have stopped
- spaces have been re-planned or occupancy has increased
- energy use suggests fans run longer than needed
- you are refurbishing and need to meet current ventilation requirements
Equipment covered
| Equipment | Typical work |
|---|---|
| Supply and extract fans | Maintenance, repair, replacement, EC motor upgrades |
| Heat recovery units | Filters, heat exchangers, bypass dampers, controls |
| Toilet and general extract | Fans, controls, run-on timers |
| Ductwork, grilles and dampers | Inspection, access, damper operation |
| Ventilation controls | CO2 and occupancy sensors, schedules, BMS points |
Our process
- Describe the system and the problem, or ask us to survey.
- We inspect, test and record the system’s condition and operation.
- Repairs are carried out or quoted for approval.
- You receive a report with any recommendations.
Typical applications
Offices, meeting rooms, hotel bedrooms and corridors, retail units, warehouses, classrooms and healthcare premises.
Maintenance considerations
Ventilation systems are easy to forget because they are mostly hidden. Keep a schedule for fans, filters and heat recovery units, and make sure time schedules match how the building is actually used.
Compliance and safety
Regulation 6 of the Workplace (Health, Safety and Welfare) Regulations 1992 requires effective and suitable ventilation in enclosed workplaces. New or altered systems should meet Approved Document F.
Moving parts and electrical supplies. Fans can start automatically. Safe isolation is required before any access panel is opened.
Coverage across London
We take ventilation enquiries across London and Greater London. See areas we cover.
Commercial Ventilation: frequently asked questions
How do we know if our ventilation is adequate?
Signs of poor ventilation include stuffiness, condensation, lingering odours and complaints of drowsiness. CO2 monitoring is a practical indicator of whether occupied spaces are receiving enough fresh air. HSE gives guidance on using CO2 monitors in the workplace.
What is demand-controlled ventilation?
Demand-controlled ventilation adjusts fresh air rates to occupancy, typically using CO2 or occupancy sensors. It can maintain air quality while reducing fan and heating energy when spaces are lightly used.
Do you clean kitchen extract ductwork?
Specialist kitchen extract grease cleaning is carried out to its own industry standard and is not covered on this page. We can maintain and repair the fans and controls serving general extract systems.
Why is our extract fan noisy?
Typical causes are worn bearings, a slack or damaged belt, an unbalanced impeller, debris in the fan or loose mountings. Noise should be investigated before the fan fails.
What is heat recovery ventilation?
Heat recovery units transfer heat between extract and supply air, reducing the energy needed to heat or cool incoming fresh air. They need regular filter changes and checks on the heat exchanger and bypass dampers.
UK guidance and references
Primary and industry sources relevant to this subject. Always check the current edition and how it applies to your building.
- Ventilation in the workplace Health and Safety Executive
- Approved Document F: ventilation GOV.UK
- Workplace (Health, Safety and Welfare) Regulations 1992 legislation.gov.uk