Commercial HVAC Services, Maintenance & Installation in London

Commercial HVAC services are the installation, maintenance, servicing and repair of heating, ventilation and air conditioning systems in non-domestic buildings such as offices, hotels, shops, warehouses, schools and healthcare premises. They cover equipment such as air handling units, fan coil units, air conditioning, chillers, heat pumps, ventilation fans and the controls that run them.

Any building that relies on mechanical heating, cooling or ventilation benefits from planned maintenance. That includes offices, hotels, retail units and shopping centres, warehouses, schools and colleges, healthcare premises and mixed-use buildings. See industries we support for how requirements differ.

Most commercial HVAC plant is serviced quarterly or six-monthly, with some checks monthly and others annually. The right frequency depends on the equipment, its duty, the manufacturer's instructions and statutory checks such as F-gas leak testing. Many operators base schedules on the SFG20 maintenance standard. Read our guide: how often commercial HVAC should be serviced.

A typical visit includes visual inspection, filter checks or changes, coil and drain cleaning, fan, belt and bearing checks, electrical and controls checks, refrigerant checks where applicable, readings of key temperatures and pressures, and a written record of findings and recommended actions.

Planned preventative maintenance (PPM) is the most reliable way to keep commercial HVAC running and to evidence compliance with workplace ventilation and temperature duties, F-gas requirements and insurer or lease conditions. Purely reactive maintenance tends to cost more over time through breakdowns and shortened equipment life.

Common causes include blocked filters and coils, failed fans, motors or capacitors, blocked condensate drains, faulty sensors and actuators, incorrect control settings, refrigerant leaks and tripped electrical protection. Many of these are picked up early by planned maintenance.

Repair usually makes sense when the equipment is in reasonable condition and parts are available. Replacement becomes worth considering when failures are frequent, parts or refrigerant are hard to obtain, efficiency is poor or the system no longer meets the building's needs. An HVAC system assessment provides the evidence for the decision.

Check the controller is set to cooling with a sensible setpoint, look for fault codes, check that filters are not blocked and that outdoor units are clear and running. Do not open electrical panels or repeatedly reset tripped equipment. If cooling is critical, for example in a server room, call our 24/7 contact line on 020 7998 9005. Our HVAC breakdown guide has a fuller checklist.

Yes. Clean filters and coils, correctly tensioned belts, calibrated sensors and time schedules that match occupancy all help plant run closer to its design efficiency. The saving depends on the system's starting condition, so we report findings rather than promise a figure.

A commercial installation normally includes a survey, design coordination, planning and permits, installation of equipment, pipework, ductwork, electrical connections and controls, testing and commissioning, and handover documentation such as commissioning records, manuals, warranties and F-gas records. See HVAC installation.

An air handling unit (AHU) is a large central unit that filters, heats or cools and moves air to whole floors or buildings through ductwork, often bringing in fresh air. A fan coil unit (FCU) is a small local unit that heats or cools the air in an individual room or zone, usually recirculating room air. Many buildings use both.

A building management system (BMS) reads sensors such as temperature, humidity and CO2, then switches and modulates plant such as AHUs, chillers, pumps and valves according to time schedules, setpoints and control strategies. It also raises alarms when equipment faults. See HVAC controls and BMS.

Look for clear scopes based on an asset list, maintenance tasks aligned with manufacturer guidance and SFG20, evidence of competence such as F-gas certification for engineers working on refrigerant systems, appropriate insurance, transparent reporting and clear arrangements for reactive and out-of-hours faults. Ask to see example reports before you sign.

Give the site address and postcode, the equipment affected, what has happened and when, any fault codes or alarms, the risk to people, equipment or operations, how access works on site, and a contact who will be there. Photos of the unit and its rating plate help.

Use the enquiry form to tell us about your building, equipment and requirements, call 020 7998 9005, or email info@flairfacilities.co.uk. We discuss next steps with you and, where appropriate, arrange a survey before giving a quotation.