Inverter technology is a game-changer for efficiency. Non-inverter or traditional units turn the compressor completely ON and OFF to maintain temperature, which consumes a surge of power each time it starts. In an inverter aircon, on the other hand, the compressor runs continuously but adjusts its speed to precisely maintain the desired temperature. And in Singapore’s climate, where aircon is used frequently for long periods, inverter technology avoids constant power surges and operates at a steady, low power state, resulting in much higher energy savings.

• Capacity (BTU): Ensure the unit is correctly sized for your room. An undersized unit will overwork, while an oversized unit will short-cycle (turn on and off frequently), both wasting energy. Use our online BTU calculator guide to help factor in Singapore’s room sizes, sun exposure, and heat from appliances.
• Refrigerant Type: Modern units use R32 refrigerant, which is more environmentally friendly and more efficient than the older R410A.

The NEA recommends setting your thermostat to 25°C. This temperature is cool enough for comfort but minimizes the energy required to achieve a large temperature difference from the outdoor humidity. Every degree lower can increase energy consumption by up to 10%.

Singapore’s high humidity is a major reason we feel hot. The “Dry” mode works by running the compressor at a lower speed to primarily remove moisture from the air rather than cool it drastically. Since removing humidity makes the air feel cooler, you can feel comfortable at a higher thermostat setting (like 26-27°C), using less energy than full “Cool” mode at a lower temperature.

Yes, absolutely. Using a ceiling fan with your aircon allows you to set the thermostat 2-3°C higher. The fan creates a wind-chill effect, making you feel cooler without the aircon working as hard to lower the ambient temperature. This is one of the simplest and most effective ways to reduce energy consumption.

A significant amount. A dirty aircon with clogged filters and dusty coils forces the fan and compressor to work much harder to push air and achieve the set temperature. Industry experts state that regular cleaning and servicing can improve efficiency by 15-30%. Neglecting maintenance can cause your electricity consumption to skyrocket.

For inverter aircons, it is almost always more efficient to turn it off when the room is unoccupied for more than 30 minutes. The myth that “it uses more power to cool down a room again” applies to old non-inverter units. Modern inverters are designed to cool a room efficiently from a warm state without the massive energy spike of older models.

This is called reducing the “cooling load.” Simple steps include:

• Using curtains or blinds to block out the afternoon sun.
• Ensuring doors and windows are well-sealed to prevent cool air from escaping.
• Avoiding using heat-generating appliances like ovens and dryers during the hottest part of the day.

Smart aircons can contribute to savings through features like:

• Scheduling: Automatically turning off when you leave for work and turning on before you return.
• Geo-fencing: Using your phone’s location to adjust settings when you are away or heading home.
• Usage Reports: Providing insights into your consumption patterns.

So while the initial cost is higher, the convenience and potential for eliminating wasted cooling (e.g., forgetting to turn it off) can lead to long-term savings, especially for busy households.