A fan coil unit (FCU) is a terminal heating and cooling device found in commercial buildings, hotels, apartments, and residential blocks across London. Each unit circulates room air through hot or chilled water coils connected to a central plant, allowing individual room temperature control. FCUs should be serviced annually — CIBSE TM43 is the UK maintenance standard — covering coil cleaning, filter replacement, condensate drain clearance, fan motor inspection, control calibration, and electrical checks. Filters in high-footprint commercial environments often need checking monthly. Under the Energy Performance of Buildings Regulations, air conditioning systems with a rated cooling output above 12 kW must have a TM44 energy inspection every five years; multi-zone FCU installations are covered by this requirement. Planned maintenance prevents the three most common FCU failures: blocked condensate drains causing water damage, fouled coils reducing efficiency, and clogged filters degrading indoor air quality.
FCU Maintenance for London Commercial Properties
Whether you manage a single office or a portfolio of commercial buildings, we keep your fan coil units running at peak performance all year round.
Facilities Managers
Keep tenants comfortable year-round with reliable climate control
Commercial Landlords
Protect property value and reduce tenant complaints
Office Managers
Maintain productive work environments with optimal air quality
Property Management
Streamline maintenance across your entire portfolio
What is an FCU?
Fan coil units are essential climate control systems found in most commercial buildings. Understanding how they work helps you recognise when maintenance is needed.
Where They're Found
Offices, hotels, hospitals, retail spaces, and apartment blocks use FCUs for individual room climate control.
How They Work
A fan circulates room air through heating or cooling coils connected to central hot/chilled water systems.
Why Maintenance Matters
Filters clog, coils foul with dust, and drains block — causing inefficiency, water damage, and poor air quality.
Signs Your FCU Needs Service
Recognising these symptoms early prevents costly repairs and keeps your building comfortable.
Weak airflow or no cooling
Blocked filters or fan motor issues reducing performance
Inconsistent temperatures
Control or thermostat problems causing hot/cold spots
Water dripping from unit
Blocked condensate drain causing water damage risk
Musty smell or unusual noise
Mould growth on coils or worn bearings need attention
What You Get From Professional Servicing
Regular FCU maintenance delivers measurable improvements in comfort, efficiency, and equipment lifespan.
Better Air Quality
Cleaner, healthier indoor environment for everyone
Lower Energy Bills
Optimised performance reduces running costs
Quieter Operation
No rattling fans or noisy bearings
Extended Lifespan
Proper care extends equipment life significantly
Our Professional FCU Maintenance Process
Comprehensive maintenance that prevents problems before they start and keeps your FCUs running at peak efficiency.
Filter replacement/cleaning
Optimal airflow & air quality
Coil cleaning & inspection
Maximum heat transfer efficiency
Condensate drain clearance
Prevents water damage & mould
Fan motor lubrication
Extends motor lifespan
Control system calibration
Accurate temperature control
Electrical connections check
Safety & reliable operation
Maintenance vs Emergency Repair Costs
Preventive Maintenance
£300/year
- • Scheduled maintenance visits
- • Filter replacements included
- • 24/7 emergency cover
- • Extended equipment life
Emergency Repairs
£3,000/incident
- • Call-out charges
- • Replacement parts
- • Business downtime costs
- • Shortened equipment life
UK Compliance & Legal Requirements
Stay compliant with UK building regulations and avoid costly penalties with professional FCU maintenance.
TM44 Air Conditioning Inspections
Commercial buildings with AC systems over 12kW must have regular TM44 inspections under the Energy Performance of Buildings Regulations. Poor FCU maintenance can result in failed inspections and fines up to £300 per unit.
Landlord Maintenance Obligations
Commercial landlords must ensure HVAC systems are properly maintained. Tenant complaints about poor heating/cooling can lead to legal disputes and rent reductions.