Ceiling fan vs aircon: what actually saves you money on your SP bill?

For July to September 2026, Singapore's regulated electricity tariff is 31.91 cents per kWh before GST, or 34.78 cents including GST, according to the Energy Market Authority. Retail plans differ and the regulated tariff changes quarterly, so check your bill for the rate that applies to you. That number is the key to figuring out whether your aircon habit is eating your salary, and whether a ceiling fan would actually save you anything.

The wattage reality check

Here's how much power common cooling options actually draw:

• 56" DC ceiling fan, low speed: 8–15 watts
• 56" DC ceiling fan, max speed: 28–35 watts
• 56" AC ceiling fan, max speed: 60–75 watts
• 9,000 BTU aircon (small bedroom), running: 700–900 watts
• 12,000 BTU aircon (medium bedroom): 900–1,300 watts
• 18,000 BTU aircon (living room): 1,400–2,000 watts

In the illustrative 20W-versus-800W case below, the fan input is40× lower while both are running. That is an example, not a universal appliance ratio — which is why many homeowners ask us about a ceiling fan installation when they review their SP bill. That ratio doesn't even include the compressor cycling — aircons draw closer to their peak only when actively cooling, but they cycle on/off all night.

What it costs you, per night

The table holds power constant for 8 hours at 34.78¢/kWh including GST so the arithmetic is easy to audit. Real inverter aircon draw changes throughout the night.

Numbers in real homes vary — newer inverter aircons cycle down once the room is cool, so actual use may be below a constant-input estimate. The reduction is not a fixed percentage, and a unit that isn't cooling properly will run closer to peak all night. Older non-inverter units run closer to peak too.

Why fans alone aren't always enough

On a 32°C Singapore afternoon, a fan moves air but doesn't cool it. You feel cooler because moving air evaporates sweat faster, but the room is still 32°C. For sleeping, that often isn't enough on the hottest nights — which is when a well-maintained aircon earns its keep, and why keeping servicing costs in check matters to the overall maths.

Where fans dominate aircon:

• Mild periods when moving air is comfortable without mechanical cooling
• Occupied, ventilated spaces where a breeze is more useful than lowering room temperature
• Short visits where starting an aircon would provide little benefit

The hybrid strategy (this is the actual money-saver)

Running fan + aircon together is the trick that gets you cool air at much lower cost than aircon alone.

The principle

Try a moderate aircon setting—NEA recommends 25°C—and use the fan while people are in the room. Air movement can improve perceived comfort, allowing a higher setpoint for some occupants. NEA's household energy guidance models lower aircon consumption for every degree raised, but comfort and savings vary by home.

To estimate your own saving, compare plug-level or smart-meter energy over similar nights before and after changing the setpoint, then subtract the fan's energy. Our guide to the best ceiling fans for HDB flats explains what to compare before buying; do not assume a universal 18-month payback.

Common myths

"Leave the fan running so the cool air circulates"

Half-right. Ceiling fans cool people, not rooms. Running a fan in an empty room saves nothing — turn it off when you leave. The circulation effect is only useful when there are people in the room to feel the air movement.

"DC fans use the same power as AC fans"

Too broad. Many DC models list lower input power, but the percentage depends on the two exact models and comparable airflow. Our comparison of KDK, Fanco and Crestar breaks down which brands do DC best. The comparison shows how to check rated watts and model data.

"Aircon on 18°C cools the room faster"

Setting a lower target does not increase the equipment's rated cooling capacity. It generally keeps calling for cooling longer. Use a moderate target—NEA recommends 25°C—and pair it with a fan if the occupants find the air movement comfortable.

The takeaway

Ceiling fans don't replace aircon in Singapore — but they change the maths. Used together, they may let you raise the aircon setpoint and reduce energy while preserving comfort, but measure your own result rather than assuming a fixed 50% saving.

If you don't have a ceiling fan in your bedroom, the upgrade — a quick job for a licensed electrician if your ceiling needs a fresh mounting point or wiring — can lower running cost when it replaces some aircon hours or supports a higher setpoint. Ask for the fan's rated watts and installed quote, then calculate the payback with your own usage rather than a sales promise.