How to estimate new aircon running cost in Singapore

A good estimate starts with your usage pattern, not a generic claim. The same system can cost very differently in a bedroom versus an open living area.

Look at cooling demand, how long the unit usually runs, and how often multiple rooms run together. These factors shape the real bill impact.

Efficiency labels and published ratings help you compare options on the same page. They are useful when you compare similar capacity and usage assumptions.

They do not replace sizing and installation quality. A well rated system can still feel costly if it is mismatched to the room load or usage pattern.

One common mistake is comparing systems with different capacities as if they serve the same job. Another is using a usage estimate that does not match real habits.

Some buyers also ignore room condition and placement. When the unit works harder to reach comfort, the bill can rise even with a good label rating.

Keep the same room assumptions across quotes. Compare capacity, efficiency label, and likely usage pattern together.

Ask contractors what comfort target they assumed and whether the recommendation changes if more rooms run at the same time.

Prepare a short list of candidate systems and your room usage pattern. This makes cost estimates more useful and reduces guesswork.

If your current bill is already high because of a fault, solve that issue first before using it as the baseline for a new system decision.