Running an aircon in Singapore's heat adds up on the electricity bill. Pairing it with a ceiling fan is one of the simplest ways to stay comfortable while using less energy. This guide explains how it works and how to set it up.
Does using a fan with the aircon save electricity?
Yes. A fan makes moving air feel cooler, so you can set the aircon a little warmer and use less energy.
A fan doesn't cool the air. It moves air across your skin, which helps sweat evaporate and makes you feel cooler. That means you can:
- Set the aircon a little warmer and feel just as comfortable
- Spread the cool air evenly instead of having cold spots near the fan coil
- Turn the aircon off sooner, or use the timer, and let the fan carry on
A higher set temperature usually means the compressor works less, which lowers the energy used. How much you save depends on your aircon, your room and how you use it.
To estimate running cost, compare the estimated annual energy use (kWh) on the NEA energy label of each model and multiply by your electricity tariff.
Enter your aircon model, hours and set temperature to estimate the difference.
How do I set up fan plus aircon?
Cool the room with the aircon first, then run the fan at low or medium speed and raise the aircon temperature.
- Run the aircon to cool the room first, then turn on the fan at a low or medium speed.
- Raise the aircon temperature a step or two and see whether you're still comfortable.
- Use the aircon timer or sleep mode so it switches off during the night, and leave the fan running.
- Close doors and windows while the aircon runs.
- Use curtains to block afternoon sun.
Which ceiling fan works best with an aircon?
A DC ceiling fan sized to the room.
- Size: match the blade span to the room. See ceiling fan size by room.
- DC motor: generally quieter and more efficient, which suits bedrooms where it runs all night.
- Speeds: more steps let you find a gentle breeze.
- Light kit: useful if the room has one ceiling point. See best ceiling fan with light for HDB.
See the models we carry, with current prices and NEA tick ratings, in our ceiling fans collection.
Can I use Climate Vouchers on both the fan and aircon?
Yes, on 5-tick aircons and approved DC fans at participating retailers.
Eligible households can claim S$400 in Climate Vouchers (S$300 plus S$100), valid until 31 December 2027 (Climate Friendly Households Programme FAQs). They can be used on 5-tick air-conditioners and approved DC fans at participating retailers (CFHP terms and conditions). See eligible appliances.
Does maintenance affect the savings?
Yes. Clean aircon filters and serviced units run more efficiently.
- Clean the aircon filters regularly, and service the units on schedule.
- Wipe the fan blades every few weeks.
- Check for wobble. Tighten the mounting and balance the blades.
What does a ceiling fan cost?
See the models we carry, with current prices and NEA tick ratings, in our ceiling fans collection.
For typical installation charges, see our ceiling fan installation cost guide.
What is the setup checklist?
- Fit a correctly sized DC ceiling fan in each room you cool.
- Run both, and raise the aircon temperature.
- Use timers and sleep mode.
- Maintain both regularly.
- Use your Climate Vouchers before 31 December 2027.
How should I set up each room?
Master bedroom - Run the aircon to cool the room before bedtime, then switch on the ceiling fan at a low speed. - Set the aircon a little warmer than usual and use sleep mode or a timer. - Choose a quiet DC fan with a sleep timer.
Common bedrooms - The same approach works. For children's rooms, check the fan clearance around bunk beds. - If a room is only used occasionally, a fan alone may be enough on cooler nights.
Living room - Use cross-ventilation and a ceiling fan for most of the day. - Switch on the aircon only for the hottest afternoons, or when you have guests. - A larger blade span, or two fans, suits long living and dining areas. See ceiling fan size by room.
- Avoid pointing the fan straight at papers.
What mistakes cancel out the savings?
The biggest is setting the aircon very low and running the fan at full speed.
- Setting the aircon very low and running the fan at full speed. You lose the savings. Raise the aircon temperature instead.
- Leaving the fan on in an empty room. A fan cools people, not rooms, so switch it off when you leave.
- Ignoring room heat. Close the curtains on west-facing windows and keep doors closed while the aircon runs.
- Skipping maintenance. Dirty filters and coils make the aircon work harder, whatever the fan is doing.
- Choosing the wrong fan size. A tiny fan in a large room won't spread the cool air.
Which direction should the ceiling fan spin?
Use normal (forward) mode for a direct downward breeze when cooling.
Some ceiling fans can run in reverse. In normal (forward) mode, the fan pushes air down for a direct breeze. In reverse, it draws air up and spreads it gently along the ceiling and walls. When running alongside an aircon, some people prefer reverse at low speed for a more even feel without a direct draught. Try both and see which you find more comfortable.
Does a standing fan work too?
A standing or wall fan can also help you feel cooler at a warmer aircon setting. Ceiling fans have the advantage of covering the room evenly without taking up floor space, and approved DC models qualify for Climate Vouchers. Check the programme's product rules for other fan types.
How do I measure the saving?
To see what works for your home:
- Note your monthly electricity use (kWh) on your bill before you change anything.
- Try a higher aircon setting with the fan for a few weeks.
- Compare your kWh with a similar month.
- Compare your electricity bill or meter readings for the two periods.
Weather affects your bill, so compare similar months where you can.
What are the key takeaways?
- A fan makes you feel cooler, so you can set the aircon warmer.
- Use timers and sleep mode, and leave the fan running.
- Choose a correctly sized DC fan and 5-tick aircons.
- Switch fans off in empty rooms.
- Climate Vouchers can go towards both.
Need it installed? Book an installation with Home Genie and we will confirm the price and a time slot with you.
Sources
- NEA: the energy label
- NEA: MELS and MEPS
- Climate Friendly Households Programme FAQs
- CFHP terms and conditions
Frequently asked questions
Does using a fan with an aircon save electricity?
A fan makes moving air feel cooler, so you can set the aircon a little warmer and still feel comfortable. A warmer setting usually means the aircon uses less energy.
Should I run the fan and aircon together?
Many households do, especially in bedrooms at night. Use the fan to spread the cool air, and raise the aircon temperature.
Which fan is best with an aircon?
A DC ceiling fan sized to the room. DC fans are generally quieter and more efficient, and approved models qualify for Climate Vouchers.
Can I use Climate Vouchers on both?
Yes. Climate Vouchers can be used on 5-tick aircons and approved DC fans at participating retailers, within the S$400 total.
Does the fan cool the room?
A fan doesn't lower the room temperature. It moves air over your skin, which makes you feel cooler.
