Inverter vs Non-Inverter Aircon in Singapore — Which One Makes Sense?
The short version: inverter units save electricity over time but cost more upfront. Whether that trade-off makes sense depends on how long and how often you run the unit.
How They Are Different
A non-inverter aircon has one speed: full power. It runs at full capacity until the room reaches the set temperature, then shuts off. When the room warms up again, it restarts at full power.
An inverter aircon adjusts its speed. Once the room is cool, it slows down to maintain the temperature instead of switching on and off. Lower speed means lower electricity draw.
The compressor is where the difference matters. In a non-inverter, the compressor cycles on and off constantly. In an inverter, it runs at a lower steady rate. That is easier on the compressor and cheaper to run.
Electricity Costs — The Real Comparison
Inverter units use meaningfully less electricity than non-inverter units of the same capacity. That gap is larger when the aircon runs long hours.
If you run your aircon through most of the day, the savings add up. In Singapore, where aircon is often the biggest electricity load in a home, an inverter unit can recover its price difference over time.
If you run your aircon for short periods, the savings are smaller and the payback period stretches. For very low use, the upfront cost difference may not be recovered before the unit needs replacing.
| Daily Use Pattern | Inverter Makes Sense? |
|---|---|
| Short periods only | Non-inverter may be better value |
| A few hours daily | Either can work — compare prices |
| Most of the day | Inverter recommended |
| All day and overnight | Inverter strongly recommended |
Upfront Cost Difference
An inverter unit costs more upfront than an equivalent non-inverter unit. The gap varies by brand and capacity.
Both types have similar installation costs. The difference is in the unit price. For high-use households, electricity savings typically cover the price difference over time.
Budget is a real factor. If the upfront cost is a constraint, a non-inverter unit is a legitimate choice — especially for low-use situations.
Comfort and Noise
Inverter units hold room temperature more steadily. Because the compressor does not cycle on and off, the temperature stays close to the set point rather than swinging above and below it.
They also run quieter at low speed. The constant start-stop of a non-inverter is one of the noisier parts of older aircon operation.
For bedrooms and overnight use, the steadier temperature and quieter operation of an inverter unit are noticeable benefits.
Servicing Differences
Both types need the same routine servicing — filter cleaning, coil cleaning, drain flush. The interval is the same.
Inverter units have more complex electronics. PCB faults on an inverter unit can cost more to repair than on a non-inverter. This is worth factoring in when comparing long-term costs.
Neither type is harder to service routinely. The complexity difference shows up in fault diagnosis and part replacement, not in maintenance.