Aircon Chemical Cleaning Cost in Singapore: What to Expect per Unit
Introduction
In Singapore’s humid and tropical climate, the air conditioner is one of the most hardworking appliances in every home and office. With daily use, it’s no surprise that aircon units collect layers of dust, grease, and bacteria deep within their coils and drainage systems. While regular cleaning keeps the surface clear, sometimes your unit needs more than a rinse — that’s where chemical cleaning comes in.
But how much does aircon chemical cleaning cost in Singapore, and what exactly are you paying for? This guide breaks down the average rates, service options, and what affects the final price, so you can make an informed decision before booking a service with trusted professionals like ACX.
Singapore Context: Why Chemical Cleaning Is Needed More Often Here
Singapore’s combination of high humidity, compact living, and continuous aircon use makes dirt accumulation faster than in most other countries.
- Humidity: Encourages mould growth in evaporator coils and drainage pans.
- Urban air: Dust and fine particulates from construction, traffic, and open windows stick easily to coils.
- Daily operation: Most homes run their aircon 8–12 hours a day, giving contaminants little rest time.
Because of this, many technicians in Singapore recommend one chemical wash per year alongside regular maintenance.
Why It Matters
Chemical cleaning isn’t just about shiny parts — it restores your aircon’s cooling efficiency and extends its lifespan. Neglecting deep cleaning can lead to:
- Higher electricity bills from overworked compressors.
- Water leakage from blocked drainage.
- Foul odour due to mould or bacterial buildup.
- Shorter unit lifespan and costly repairs.
A single chemical wash can often restore lost cooling performance by up to 30–40%, saving you more over time than the cost of the service itself.
What Exactly Is Aircon Chemical Cleaning?
Aircon chemical cleaning is a deep-cleaning process where the unit is disassembled and washed with a special chemical solution to remove hardened dirt, grease, and biofilm.
| Step | Description |
|---|---|
| 1 | Disassemble the indoor unit (front panel, filter, blower, and coil). |
| 2 | Soak major components in non-corrosive chemical solution. |
| 3 | Rinse thoroughly to remove residue and neutralize chemicals. |
| 4 | Clean and flush the drainage system to prevent leaks. |
| 5 | Reassemble and test cooling performance. |
Types of Chemical Cleaning in Singapore
There are two main categories of chemical cleaning available:
| Type | Description | Average Cost (SGD) |
|---|---|---|
| Chemical Wash | Deep cleaning of evaporator coil and key components without full disassembly. | $120–$180 per unit |
| Chemical Overhaul | Full teardown cleaning including fan coil, drain pan, and compressor line inspection. | $150–$220 per unit |
Both use safe, non-toxic cleaning agents and are carried out by trained professionals. The difference lies in how deeply the aircon is dismantled and restored.
Average Aircon Chemical Cleaning Costs in Singapore (2025)
| Number of Units | Chemical Wash (SGD) | Chemical Overhaul (SGD) | Suitable For |
|---|---|---|---|
| 1 unit | $120–$150 | $150–$200 | Bedrooms or small offices |
| 2 units | $160–$240 | $200–$280 | Condos or multi-room setups |
| 3–4 units | $240–$360 | $300–$420 | HDB 4-room or 5-room flats |
| 5 units & above | $350+ | $450+ | Large homes or offices |
Many providers like ACX offer multi-unit package discounts, making it more cost-effective for households with several air conditioners.
Factors Affecting the Cost
- Type of Aircon Unit
Wall-mounted split systems are cheaper to clean than ceiling cassettes or ducted units due to easier access. - Condition of the Unit
Heavily clogged or leaking units may require longer cleaning or even minor repairs, slightly raising the cost. - Service Frequency
If your unit hasn’t been serviced in over a year, it’s likely to need a full chemical overhaul instead of a basic wash. - Accessibility
Units installed high up or in tight corners may take extra time, adding a small labour charge. - Service Provider
Established aircon specialists like ACX maintain transparent pricing with certified technicians and safe cleaning agents — you’re paying for expertise and reliability.
When Should You Schedule a Chemical Cleaning?
Not all aircon issues require chemical washing, but these signs mean it’s time to book one soon:
- Weak cooling even on full blast.
- Musty or sour smell from vents.
- Airflow feels sticky or damp.
- Noticeable water dripping from the unit.
- Higher power bills without heavier use.
For most Singapore homes, chemical cleaning is recommended every 9–12 months as part of a balanced maintenance cycle.
General Cleaning vs Chemical Cleaning: Quick Comparison
| Feature | General Cleaning | Chemical Cleaning |
|---|---|---|
| Coverage | Filters, covers, and drainage | Deep coil, blower, and drainage wash |
| Frequency | Every 3–4 months | Every 9–12 months |
| Tools | Soft brush, vacuum | Chemical solution, pressure rinse |
| Duration | 30–45 minutes | 1–2 hours |
| Effectiveness | Surface clean | Restores full performance |
| Average Cost | $60–$90 | $120–$180 |
Professional Process Example: ACX Chemical Cleaning
When you book a chemical cleaning service from ACX, here’s what you can expect:
- Inspection: Technician checks cooling performance and gas pressure.
- Disassembly: Front panel, blower, and coil are removed.
- Chemical Soak: Components are cleaned in a non-corrosive solution.
- Drain Flush: Pipes and drainage trays are flushed to prevent leaks.
- Rinse & Reinstall: Every part is rinsed, dried, and reassembled.
- Performance Test: Airflow, temperature, and gas levels are tested before handover.
Each technician uses protective sheets and ensures no chemical residue remains, keeping your home clean and safe.
Benefits of Regular Chemical Cleaning
- Restores cooling speed and consistency.
- Eliminates odours and mould.
- Reduces electricity consumption.
- Prevents water leakage.
- Extends unit lifespan by years.
- Improves indoor air quality — crucial for families with children or asthma.
With proper scheduling, you can keep your aircon performing like new while avoiding expensive breakdowns.
Cost-Saving Tips for Homeowners
- Bundle multiple units — request package pricing for all aircons cleaned in one session.
- Alternate services — general cleaning every 3 months, chemical wash once a year.
- Book off-peak — weekday slots are often slightly cheaper.
- Keep filters clean — monthly rinsing slows down buildup and delays the next chemical wash.
- Use reputable providers — quality work prevents repeat servicing costs.
Key Takeaway Table
| Item | Details |
|---|---|
| Average cost per unit | $120–$180 |
| Frequency | Once per year |
| Duration | 1–2 hours per unit |
| Suitable for | Homes using aircon daily |
| Key benefits | Better cooling, cleaner air, longer lifespan |
| Recommended provider | ACX |
Frequently Asked Questions
1. How long does chemical cleaning take?
Typically about 1–2 hours per unit, depending on size and dirt level.
2. Is chemical cleaning safe?
Yes, professional technicians use non-toxic and non-corrosive solutions safe for indoor environments.
3. Can I do chemical cleaning myself?
No. It involves disassembling electrical parts and handling chemical agents — best left to licensed professionals.
4. How often should I book one?
Once every 9–12 months for most Singapore homes, or more frequently if your unit runs daily.
5. Does it remove odours completely?
Yes, chemical cleaning eliminates mould and bacteria that cause foul smells.
6. Is chemical cleaning the same as chemical overhaul?
Not exactly. A chemical overhaul is a full dismantle and restoration, slightly more comprehensive and expensive.
7. Will chemical cleaning improve cooling immediately?
Yes, most customers notice stronger and faster cooling right after the service.
Conclusion
Aircon chemical cleaning may sound like a big job, but in Singapore’s climate, it’s essential for keeping your system efficient, hygienic, and long-lasting. For about $120–$180 per unit, you restore cooling performance, prevent leaks, and ensure healthier indoor air.
If your aircon has been running slower or smelling musty, it’s time to book a professional service. ACX provides expert aircon cleaning and chemical washing across Singapore — fast, transparent, and trusted.
