How to save money on Air Conditioning: 9 useful tips

Saving money on air conditioning does not simply mean using it for fewer hours. The selected temperature, the insulation of the property, the condition of the system and the way it is used can all affect energy consumption.

In Marbella, where air conditioning is frequently used throughout the summer, a few simple changes can help maintain a pleasant indoor temperature without making the system work harder than necessary.

Why does air conditioning use so much energy?

Energy consumption depends on the air conditioning system, but also on the characteristics of the room or property.

An air conditioner may use more energy when:

• The selected temperature is too low.
• Doors or windows are left open.
• The filters are dirty.
• The property receives a lot of direct sunlight.
• The system is not suitable for the size of the room.
• It is constantly switched on and off.
• It has lost performance or developed a fault.

The key to saving energy is helping the system reach and maintain the desired temperature without continuously operating at maximum power.

9 tips to save money on air conditioning

1. Set a moderate temperature

During the summer, a temperature between 24 and 26°C usually provides a good balance between a pleasant indoor environment and reasonable energy consumption.

Setting the air conditioner to a very low temperature increases the difference between the indoor and outdoor temperatures. As a result, the system needs to work for longer.

These figures should be treated as a general reference. Humidity, insulation, sun exposure and the orientation of the property also affect how the temperature feels.

2. Do dot lower the temperature to cool the room faster

Setting the air conditioner to 18°C will not usually cool the room faster than setting it to 24°C.

The system will continue operating until it approaches the selected temperature. If the setting is unnecessarily low, it will simply remain switched on for longer and consume more energy.

It is better to choose a suitable temperature from the beginning and keep it stable.

3. Keep doors and windows closed

When warm air enters from outside, the air conditioner has to work harder to maintain the selected temperature.

Doors and windows should remain closed while the system is running. It is also worth checking seals, frames and gaps through which cooled air may escape.

A well-insulated property cools more quickly and maintains its temperature for longer.

4. Reduce direct sunlight

Windows exposed to direct sunlight can quickly increase the indoor temperature.

Closing blinds or curtains during the hottest part of the day helps reduce heat entering the property and limits the amount of work required from the air conditioning system.

When the outdoor temperature is lower, the property can also be ventilated early in the morning or during the evening before switching the system on.

5. Use ECO mode and the timer

Many air conditioning systems include functions designed to adapt their operation to the actual requirements of the room.

ECO mode adjusts the system’s performance to maintain a stable temperature while limiting unnecessary energy consumption.

The timer can be used to schedule when the air conditioner switches on and off, preventing it from running when it is not needed. At night, Sleep mode can gradually adjust the temperature while you are sleeping.

These functions can help reduce consumption, but they cannot compensate for dirty filters or an excessively low temperature setting.

6. Avoid constantly switching the system on and off

Switching the air conditioner off and on again every few minutes is not usually the most efficient way to use it.

When the room will remain occupied, it is generally better to maintain a moderate and stable temperature. Once the selected temperature has been reached, the system can adjust its operation accordingly.

If the property will be empty for several hours, it makes more sense to switch the system off or use a timer.

7. Clean the filters regularly

Air conditioning filters collect dust and other particles that can restrict airflow.

When filters are dirty, the system may take longer to cool the room and use more energy in the process.

How often they need to be cleaned depends on the system, the surrounding environment and how frequently it is used. During the summer, it is advisable to check them regularly and follow the manufacturer’s instructions.

The system should always be switched off and disconnected before the filters are removed or handled.

8. Check the system if its performance has dropped

Cleaning the filters is important, but it does not replace a technical inspection when the system is not working properly.

The air conditioner should be checked if it:

• Takes too long to cool the room.
• Produces less airflow than usual.
• Runs continuously.
• Makes unusual noises.
• Produces unpleasant smells.
• Leaks water.
• Uses more energy without an obvious change in usage.

Continuing to use a system that is not operating correctly can increase energy consumption and make the underlying problem worse.

9. Choose a system suitable for the room

The capacity of the air conditioning system should be appropriate for the space it needs to cool.

A system with insufficient capacity will need to operate for longer. An oversized system does not necessarily provide better results and may run in short, inefficient cycles.

When selecting a system, several factors should be considered:

• The size of the room.
• Ceiling height.
• Insulation.
• Property orientation.
• The number and size of the windows.
• Direct sun exposure.
• The usual number of occupants.

When replacing an older system, it is also worth considering its energy rating and whether it uses inverter technology.

Do Inverter air conditioners use less energy?

Inverter air conditioners regulate the speed of the compressor according to the temperature requirements of the room.

Instead of operating at maximum power and then stopping completely, the system adjusts its output to maintain a stable temperature. This reduces repeated starts and stops.

However, actual energy consumption also depends on the installation, maintenance, insulation and how the system is used.

There is no need to replace a system that is working correctly simply because it does not use inverter technology. Replacement becomes more reasonable when the unit is old, requires frequent repairs or is no longer operating efficiently.

Is It better to switch the air conditioner off or leave it running?

The answer depends on how long the room or property will be unoccupied.

If you are leaving for several hours, it is generally better to switch the system off. If you will only be away for a few minutes, maintaining a moderate temperature may be more practical.

Leaving the air conditioner running all day at a very low temperature in an empty property creates unnecessary energy consumption.

Does air conditioning use less energy at 26°C?

Under similar conditions, a system set to 26°C will usually consume less energy than one set to 21 or 22°C.

The greater the difference between the indoor and outdoor temperatures, the harder the system has to work to maintain the selected setting.

A temperature of 26°C should be treated as a general reference and adjusted according to the conditions of each property.

Which air conditioning mode uses the least energy?

ECO mode is usually the most suitable option for reducing consumption during extended use because it regulates the system’s performance and limits unnecessary operation.

The timer helps control how long the system runs, while Sleep mode can be useful at night.

However, no operating mode can fully compensate for dirty filters, poor insulation, an incorrect installation or significant temperature loss.

How to reduce air conditioning energy consumption

The best results come from combining a moderate temperature, good insulation, protection from direct sunlight, suitable programming and regular maintenance.

If the system is no longer cooling correctly or energy consumption has increased without a clear reason, it is worth identifying the cause. Climate Control is an air conditioning and climate control company in Marbella.