AC and AHU servicing
gpt 5 mini
01/10/25, 12:14
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Scope of Works
• Inspect external condensing unit and internal AHU casing for damage and secure access panels
• Remove and either clean or replace filters and record filter types and recommended change intervals
• Inspect and clean evaporator and condenser coils and drain pans and report heavy contamination
• Check condensate drain, trap and pump operation and clear blockages where safe
• Test fans, belts and motor bearings, lubricate moving parts where required and report wear
• Perform electrical and control checks: fuses, isolators, contactors, sensors, run current and safety interlocks; use PPE and containment for mould or refrigerant exposure
Typical Cost
Charge Type | Low £ | High £ | Notes |
|---|---|---|---|
Call-out / Minimum | £95 | £180 | Initial attendance, first 30–60 min on site |
Labour per hour | £65 | £95 | Engineer time on site; higher for specialist AHU engineers |
Materials | £20 | £180 | Filters, cleaning chemicals and small replacement parts; major parts quoted separately |
Disposal | £0 | £60 | Disposal of contaminated filters, wipes or chemical waste where required |
Extras (e.g. scaffolding) | £150 | £900 | Scaffolding, MEWP hire or specialist access for roof plant and large AHUs |
TOTAL (most jobs come in here) | £180 | £1,200 | Rounded typical range for routine domestic services through to larger commercial AHU work |
Time on Site
Routine domestic split systems or small AHU inspections and filter changes typically take 1–3 hours; servicing larger rooftop or makeup air units can take a half day to 1–2 days depending on coil banks and access. restricted access, heavy contamination, required repairs, parts ordering or need for MEWP/scaffolding will extend the visit
Questions to Ask Your Tradie
• Are you F‑Gas certified and insured to work on refrigerant systems?
• Does the service price include filter supply and replacement or is that extra?
• Will you provide a written service checklist, photographs and test readings after work?
• If you find a refrigerant leak or failed component how will you quote repairs and how long will parts take?
• Do you need shut‑down time, access to plant room keys, or working‑at‑height permits?
• How do you manage contaminated AHUs (mould, biological debris) and what additional costs should I expect?
How to Avoid Surprises
• Ensure clear access to the plant room and note any locked doors or keys needed
• Reserve parking near the entrance or advise on loading restrictions for the van
• Flag site rules, noise curfews and authorised hours before booking
• Have preferred filter sizes or part numbers to avoid same‑day delays
• Check whether roof access, ladders or MEWP will be needed and agree responsibility for hire
• Clear space around internal units and secure pets and sensitive equipment
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