Commercial Air Conditioning Service

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23/07/25, 22:06

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Commercial Air Conditioning Service

Scope of Works

Review F-Gas logbook; note refrigerant type, system charge and previous leak history.
Isolate power, remove indoor filters, outdoor coil guards; vacuum or wash clean.
Check fan belts, bearings and drain pans; dose condensate lines with biocide tablets.
Tighten electrical terminals, test contactors and measure phase balance.
Connect gauges; record suction/discharge pressures, superheat/sub-cool readings.
Perform electronic leak scan of joints, flare nuts and service ports; update F-Gas log.
Verify controller set-points, sensor calibration and BMS alarms.
Restart system; log running amps, COP/EER and supply/return air ΔT.
Issue digital service report with recommendations and parts list if remedial work required.

Typical Cost (inc. VAT)

Charge type	Low £	High £	Notes
Call-out / minimum (first hour on site)	90	140	Includes travel & first split/VRF head
Labour per hour (thereafter)	45	70	Two-person team if roof access
Materials (filters, belts, biocide)	20	120	Per 3–4 indoor units
Disposal (filters, oil)	0	40	Hazardous-waste consignment
Extras (roof scaffold, gas top-up, out-of-hours)	0	250	Site-specific
TOTAL (most jobs come in here)	250	620	Service 4–6 indoor heads + condensing unit

Time on Site

1½ – 3 hours for a small shop/office (up to six indoor units). Longer if: units are ceiling-concealed, roof access needs scaffold or system fails pressure/leak tests.

Questions to Ask Your Tradie

Are your engineers F-Gas Category 1 certified and insured for commercial premises?
Does the service include electronic leak detection and an updated F-Gas logbook?
Will you supply new washable or disposable filters within the quoted price?
How do you handle refrigerant top-ups and is the gas charged per gram or per cylinder?
Do you provide a written report with performance readings and remedial recommendations?
Are rooftop or ladder access charges, permits and parking included?
What response time and hourly rate apply if breakdowns are found during the service?

How to Avoid Surprises

Access & Parking: Reserve a bay for the service van near panels; arrange rooftop permits or lift keys.
Working-at-Height: Confirm if scaffold, man-safe lines or MEWP are required for condensers.
Site Induction: Provide RAMS details and asbestos register before arrival.
Power Isolation: Ensure maintenance staff can isolate circuits without disrupting IT or refrigeration.
BMS / Alarm Codes: Have login credentials ready so the engineer can clear service flags.
After-Hours Use: Schedule service when occupants are minimal to reduce disruption and speed filter removal.