Ducted & Cassette Aircon Service
in Malaysia (2026)

Figures below are indicative Klang Valley market ranges for planning, not a quote. ClickBina is an independent Klang Valley contractor — we are not a brand agency and we do not speak for any manufacturer’s service policy. Ask us on WhatsApp.

Cassette, ducted, concealed: what you actually have

“Ceiling aircon” covers several quite different machines, and knowing which one is above your ceiling changes both the service scope and the price. The quickest test is what you can see from the floor:

If you are not sure which you have, photograph the ceiling grille and the outdoor units and send them — it takes seconds to identify and it changes the quote materially.

Why a ceiling unit is not a wall unit with a different lid

The refrigeration is the same. Everything around it is not, and that is where the cost and the risk live:

• The unit is above your head, over a finished ceiling. Every litre of wash water and every loosened piece of debris has somewhere it must not go. A cassette wash needs the unit bagged and the water channelled out — done badly, the ceiling tiles and whatever is under them pay for it.
• Drainage is usually pumped, not gravity-fed. A small pump lifts the condensate into a drain line in the void. Pumps fail; gravity does not.
• The filters are often not where you think. On a concealed unit they can sit at the return-air grille, metres from the machine — and get missed for years.
• The coil is bigger and dirtier. Ceiling units in offices and shops run longer hours in dustier air than a bedroom split, so fouling accumulates faster.
• Access is a trade in itself. Ladders or a platform, ceiling tiles out, sometimes a light fitting or a sprinkler head to work around.

None of that makes a ceiling unit worse. It makes it a job that has to be scoped, and it is why a quote given over the phone from “how many units?” alone is a guess.

Ceiling access: the constraint that sets the price

On a wall split, access is free. On a ceiling unit it is often the largest single variable in the quote, and it is entirely determined by decisions made when the ceiling went in. Things that push a straightforward service into a difficult one:

• No access panel near a concealed unit — someone has to cut one, and then make good. If you are fitting out now, insist on access panels at every unit and at every drain pump; the false ceiling guide covers how that is built.
• High ceilings in a retail unit or double-volume lobby, needing a platform rather than a step ladder.
• Fixed plasterboard ceilings instead of a lay-in tile grid — every entry is destructive and has to be patched and repainted.
• Congested voids where sprinklers, cable trays and ductwork sit in front of the unit.
• Live areas where the work has to happen around customers or staff — see scheduling below.

Two practical asks: make sure every ceiling unit and every condensate pump has a permanent access panel, and keep a simple asset list of what is above each ceiling. Both are cheap to arrange and both reduce every future visit.

The condensate pump — the small part that floods offices

Most cassettes and concealed units cannot drain by gravity, because the drain line has to run through the ceiling void to a distant point. A small condensate pump lifts the water instead, usually triggered by a float in the drain pan.

This is the component that turns a maintenance oversight into a claim. When the pan silts up, or the float sticks, or the pump gives up, the water has nowhere to go but over the edge of the pan into the ceiling. What the tenant sees is a stained tile or a drip onto a desk; what has actually happened is a slow overflow that may have been soaking insulation and cabling for days.

A competent service visit therefore treats the drainage as a first-class item, not an afterthought: the pan is cleaned rather than wiped, the float is checked for free movement, the pump is proved to run and lift, and water is poured into the pan at the end to demonstrate it clears. If a service report does not mention the drain pump on a cassette, the visit was incomplete. If you are trying to work out whether a ceiling stain is the aircon at all, this guide separates an aircon leak from a pipe leak.

What a proper cassette service visit covers

Use this as a scope to hold a contractor to. A visit that skips the bottom three rows is a wipe, not a service:

The last row is the one cheap contracts skip and facility managers value most — a report per visit, per unit, so you have a record rather than an invoice and a promise.

Ducted and concealed units: filters, plenum and the return-air path

A ceiling-concealed unit adds a complication a cassette does not have: the air it cools does not arrive at the machine directly. It is drawn through a return-air grille, along a return path or plenum, through a filter that may be at the grille rather than at the unit, and then pushed out through supply ductwork to the diffusers.

That path is where concealed systems are routinely neglected:

• The filter at the return grille gets forgotten. It is not next to the unit, so a technician servicing “the unit” may never touch it. Ask specifically where the filters are and confirm they were changed or washed.
• The return path is not a duct at all in some fit-outs — the ceiling void itself is used as a plenum, so the unit is breathing whatever is in that void. Dust from construction, insulation fibres and worse.
• Flexible duct sags and crushes. A collapsed flexible run starves a diffuser, and the room it serves is blamed on the machine.
• Diffuser balancing drifts after a partition change — a new meeting room gets built and nobody re-balances the air.

Cleaning the machine and cleaning the ductwork are two different jobs, and the second is only sometimes warranted — our duct cleaning guide sets out how to tell, because “your ducts need cleaning” is a very common sale that is very often the wrong fix.

What it costs — and why the ducted answer is a survey

The cassette figures below are published market ranges for exactly this job. The ducted and AHU rows genuinely have no honest number, and it is worth being clear why: the work is set by the access route, the filter arrangement, the length and condition of the ductwork and the plant space — variables that differ per building, not per unit. A contractor who gives you a firm ducted price over the phone has priced a guess:

One clarification worth making, because it comes up constantly: ClickBina’s flat RM130/unit chemical wash offer is for 1.0–1.5HP wall units — the standard home split. A ceiling cassette is a bigger, harder job and is priced separately, as the table shows. Anyone quoting you a wall-unit rate for a cassette either has not understood the job or has not seen it. For the residential rate card in full, see the chemical service guide and the servicing cost guide.

Symptoms that mean book it now

Ceiling units hide their decline better than wall units, because nobody is standing next to them. These are the signals worth acting on the same week:

• A stain appearing on a ceiling tile near a grille. Assume the drain pan or pump until proven otherwise, and do not wait for it to drip.
• Airflow noticeably weaker at one diffuser. Filter, blower or a collapsed flexible duct — all cheap now, all worse later.
• A musty smell when the system starts in the morning. Mould in the coil or the pan. This is a chemical-wash conversation, and an air-quality one.
• One zone never reaches temperature while the rest of the floor is fine. Usually airflow or balancing, not a dead machine.
• The system runs constantly and the bill has climbed with no change in occupancy. A fouled coil forces exactly this.
• Water in the ceiling void found during other works. Treat as urgent — it has been happening longer than you think.

Working around a live office, clinic or shop

The practical obstacle to ceiling servicing is almost never the machine — it is that the room below it is in use. Three things make it manageable:

• Zone the work. Do a floor or a wing at a time so no area loses cooling for long, rather than shutting the system down whole.
• Use the quiet window. Early morning, after close, or a weekend. Note that access to a strata building outside office hours usually needs management notice and a permit — arrange it a week ahead, not on the day.
• Protect below. Desks, stock and equipment covered before a panel comes down. On a chemical wash this is not optional.

For clinics, food premises and anywhere with a hygiene regime, agree in advance what the contractor leaves behind — a chemical wash produces run-off and a clean-down should be part of the scope, not a surprise. If the space needs a proper reset afterwards, an office and commercial clean is the companion job.

Ad-hoc visits vs a maintenance contract

For one or two cassettes in a small office, calling someone when it is due is perfectly rational. Past roughly a handful of units, ad-hoc servicing starts to fail for reasons that have nothing to do with price: nobody owns the schedule, the units drift out of cycle, and the first sign that a drain pump has failed is a ceiling stain.

A scheduled agreement fixes the ownership problem more than the cost problem. The scope, pricing models, service-level terms and the red flags to watch for are set out in full in our office aircon maintenance contract guide, and how it fits a wider asset programme is covered under planned preventive maintenance and building maintenance services. If your ceiling units are the indoor half of a VRF system, service them as a system — the VRF/VRV guide explains why that distinction matters more than it sounds.