In high-density urban environments, the quality of indoor air (IAQ) is as critical as thermal comfort. An Air Handling Unit (AHU) serves as the lungs of a commercial building, regulating and circulating air as part of a sophisticated HVAC system. At Flair Facilities, we provide specialist engineering services for AHUs, focusing on energy recovery, filtration integrity, and the mechanical reliability of the distribution network.
From standalone rooftop units to integrated systems coupled with Chillers & Cooling Plant, our engineers ensure your ventilation infrastructure meets the latest building regulations and health standards.
Comprehensive AHU Maintenance & Hygiene
A poorly maintained AHU does more than waste energy; it can become a source of biological contamination and poor air quality. Our maintenance protocols are designed to keep your ventilation system operating at peak performance while ensuring a healthy environment for building occupants.
- Filter Management: We perform regular inspections and replacements of HEPA and carbon filters to maintain high IAQ and protect the HVAC Ventilation & Mechanical Plant from debris.
- Drive & Motor Servicing: We inspect and tension fan belts, lubricate bearings, and test VSDs (Variable Speed Drives) to ensure quiet, efficient airflow.
- Coil Cleaning & Maintenance: We chemically clean heating and cooling coils to maintain optimal heat transfer and prevent the buildup of bacteria or mold.
- Dampers & Actuators: We verify the operation of mixing boxes and dampers to ensure your BMS Integration can accurately control fresh air intake and energy recovery.
System Upgrades & Energy Recovery
Many legacy AHUs in London lack modern energy recovery technology. As part of our commitment to Energy Efficiency & Decarbonisation, we specialize in upgrading existing ventilation plant with thermal wheels or plate heat exchangers. These upgrades capture waste heat from exhaust air to pre-condition the incoming fresh air, significantly reducing the load on your Commercial Gas Boiler Systems.
If your current unit is beyond its economic service life, we provide a full Strip-Out & Refurbishment service. We manage the logistics of removing oversized components from restricted-access areas and commissioning new, high-efficiency units that comply with the latest ErP (Energy-related Products) directives.
Integrated Climate & Compliance
Our ventilation services are fully integrated with your building’s wider mechanical infrastructure. We ensure that your AHUs work in harmony with Air Conditioning Systems and local Fan Coil Units (FCU) to eliminate “dead spots” and temperature fluctuations. Every service visit is documented to ensure your facility remains compliant with F-Gas regulations and health and safety audits, providing you with total peace of mind.
Air Handling Unit (AHU) Services Frequently Asked Questions
Given the high level of external pollutants in the city, we typically recommend checking filters quarterly and replacing them every 6 to 12 months, depending on the building’s usage and local air quality.
Yes. We specialize in coil repairs and replacements. If a coil has failed due to corrosion or freezing, we can source and install a bespoke replacement to restore your cooling or heating capacity.
A VSD allows the fan motor to adjust its speed based on actual demand rather than running at 100% all the time. This can lead to significant energy savings and reduces mechanical wear on the motor and drive assembly.
Our primary focus is the mechanical and engineering integrity of the Air Handling Unit itself. However, we can coordinate specialized ductwork cleaning as part of a wider mechanical maintenance contract to ensure the entire air path is sterile.