Commercial air-conditioning cleaning | FCU scope
FCU / Fan Coil Unit Cleaning
For offices, schools, clinics, retail premises and other commercial sites, an FCU cleaning quotation should start with the unit list, ceiling access, available work period and the agreed scope for filters, accessible coils, fan sections and condensate drainage. Evolt Cool Engineering uses that information to define the work, items requiring separate assessment and handover requirements before pricing.
- Unit list and locations
- Ceiling access and available work period
- Cleaning, repair and water-side work kept separate
Start with the requirement
When Is an FCU Cleaning Review the Right First Step?
Water drips, odours, weaker airflow and visible dirt can point towards cleaning, but they can also involve drainage, parts, controls or the chilled-water side. Reviewing each unit separately keeps fault repairs out of a routine cleaning scope.
You have an FCU list and need phased cleaning
Record the floor, room, equipment location and quantity, then group the work around operating hours and available shutdown zones.
Filters, coils or drainage areas show visible fouling
Photos and previous records can help, but no one should open equipment or work at height just to prepare an enquiry.
Drips, noise or airflow complaints keep returning
Cleaning can address the agreed dirt and accessible drainage scope. Parts, controls, pipework and wider system issues need a separate review.
You are comparing one-off cleaning with ongoing care
A project clean and a maintenance plan have different scopes, records and commercial arrangements. Separate them before comparing prices.
Six inputs before pricing
Share the Information You Can Obtain Safely
Quantity is only the starting point. Ceiling height, access openings, furniture, access arrangements, building procedures, shutdown constraints and handover requirements all affect labour, protection and sequencing.
- 01
Unit list
FCU quantity, equipment location, model information or general photos; unknown models can still be listed by location.
- 02
Locations and served areas
Floor, room, zone and the area served by each unit.
- 03
Ceiling access
Opening position and size, working height, nearby furniture, access arrangements and platform needs.
- 04
Operations and available work period
Opening hours, available work periods, phased-work arrangements and building-notification rules.
- 05
Known conditions
Drips, odours, noise, airflow complaints or past blockage records as scope clues, not a remote diagnosis.
- 06
Handover needs
Equipment schedules, photos, work records, defect notes or a format for separately quoted follow-up items.
Define each unit
A useful scope names each FCU component and the work involved
Each FCU is assessed according to its construction, access, site conditions and agreed cleaning method. The quotation then lists the applicable components and work scope.
Filters and frames
Confirm whether the scope covers cleaning, condition checks or replacement, and whether consumables are priced.
Accessible coil surfaces
The method depends on fouling, unit construction, product compatibility and the working space available.
Fan or blower sections
The quotation lists the accessible fan or blower sections and states whether motor, bearing, part removal or repair work is required separately.
Drain pan and condensate drainage
Record the accessible sections, blockage observations, drain checks and concealed pipework that cannot be reached.
Supply / return grilles and casing
Define the accessible grilles, panels and visible surfaces for the actual unit and site.
Cleaning agents and wash water
Where used, check the product, equipment compatibility, current SDS, site restrictions and handling arrangements first.
Keep adjacent work separate
Follow-up Arrangements for Issues Found During Cleaning
An FCU connects to chilled water, power, controls and condensate drainage. A clear quotation shows which items are cleaning and which require another trade or technical review.
Chilled-water valves, pipes and balancing
Stuck valves, leaks, insulation, flow and balancing issues are assessed through the relevant water-side service.
Motors, bearings, parts and recurring faults
Severe noise, no cooling, electrical faults or repeated leakage need diagnosis and a separate quotation.
Thermostats, sensors, actuators and BMS
Schedules, setpoints, control logic and connectivity belong to controls or wider system support.
Ductwork, IAQ, mould and disinfection
Duct cleaning, formal IAQ measurement, mould assessment and specialist disinfection require different methods and evidence.
AHUs, PAUs and central plant
Plant-room air-handling units, PAUs, chillers and pumps need their own equipment and shutdown assessment.
Phased execution and restart verification
Five main steps for FCU cleaning
When FCU works are planned in batches, we sequence the work first and confirm shutdown permissions, impacted locations, control handover points and restart checks before completion, including how to handle items that are inaccessible or abnormal.
- 01
Confirm the FCU schedule and access
Match each unit to its area, location, access hatch, ceiling height, quoted components and available work period.
- 02
Set up isolation, protection and drainage
Confirm shutdown and electrical isolation, chilled-water interfaces, work-zone separation, ceiling and room protection, and wash-water handling.
- 03
Clean the quoted FCU components
Treat the filter, safely accessible coil, fan, drain pan and condensate drainage components. Water-side and controls work is defined separately.
- 04
Restart by batch and confirm operation
After drying, refit the components and restart units in batches, checking airflow, abnormal noise, control response and visible drainage.
- 05
Complete an FCU-by-FCU record
Check the completed scope, treated components, basic observations, inaccessible areas and follow-up items.
Make handover traceable
The completion record should state the completed work
and any items that still need attention
Photos can support visible observations, but they do not replace measurements, fault diagnosis or IAQ certification. Useful records stay tied to the unit and location, with completed, inaccessible and follow-up items kept separate.
Unit and location
List the equipment location, room, floor or zone for each completed unit instead of reporting only a total.
Included components
Record the filters, coils, fan sections, drainage or grilles actually addressed on each unit.
Limits and exceptions
Identify inaccessible areas, items requiring separate assessment and locations affected by shutdown or site constraints.
Abnormalities and next steps
Keep leaks, parts, controls, water-side or electrical issues as follow-up items instead of ending with “unit running”.
Our Other Services
We can also help with other air-conditioning and system needs
For sites with several indoor-unit types or an uncertain equipment list.
System contextAHU, PAU & FCU SupportUnderstand the equipment, air-side, water-side and controls relationship.
FaultsCommercial AC RepairFor recurring leakage, no cooling, severe noise or part failures.
Ongoing careEvolt Care Maintenance PlansCompare scheduled maintenance, service items, records and commercial arrangements.
Water sideCentral AC & ChillersFor chilled-water, pumps, valves and central-system issues.
ControlsBMS, Controls & AutomationFor schedules, setpoints, sensors and control logic.
Frequently asked questions
What Do Commercial Buyers Ask Before FCU Cleaning?
How can we tell whether the ceiling unit is an FCU?
Asset labels, equipment lists, chilled-water connections, access locations and drawings can help. Take photos only from a safe, accessible position. If the equipment is uncertain, start with Commercial AC Cleaning or read about AHU / FCU Support.
How often should an FCU be cleaned?
There is no single interval for every site. Use equipment instructions, operating hours, the site environment, filter and drainage condition, service history and inspection findings.
How are dripping or weak-cooling issues followed up?
Cleaning can address agreed fouling and accessible drainage. If the findings point to concealed drains, parts, chilled water, controls, power or another system condition, we will explain the appropriate follow-up investigation.
How does the quotation cover cleaning agents, filters and parts?
The quotation identifies cleaning agents, consumables, filter cleaning or replacement, dismantling, parts, wash-water handling and any separately assessed items.
Can the work be phased or carried out outside office hours?
State the preferred windows, no-shutdown areas, building procedures and notification needs in the enquiry. Dates, hours, labour, noise, isolation and reinstatement must be confirmed for the site and agreed scope.
Provide the FCU count, locations and access points,
together with the available work period
Include any safe photos, asset list or floor plan together with known leakage, odour, noise or maintenance records. Do not open equipment or work at height to prepare the enquiry. If another issue is found during cleaning, we will explain what can be followed up during the visit and what should be arranged separately for inspection or repair.