Close the windows when you turn on the air conditioning, everyone thinks it’s right but the experts shake their heads: “Everything is wrong”.

To beat the heat in summer, avoid these 3 mistakes when using an air conditioner, as they not only waste electricity but also harm your health.

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To excessively low air conditioning temperature

Many families have the habit of turning on the air conditioning at a very low temperature. If the indoor temperature is too different from the outside temperature, it can be harmful to health. Setting the air conditioning temperature too low can make you and your family members more susceptible to catching a cold. This is especially true for children, who are more vulnerable to temperature changes between the inside and outside of the house.

Close the door tightly when using the air conditioning

When people turn on the air conditioning, they often think they need to close the door tightly to prevent the cold air from escaping. After cooling down the room, they will turn off the air conditioning and use the remaining cool air to save energy. However, this is one of the serious mistakes when using the air conditioning. When you close the door after turning off the air conditioning, the air in the sealed room can become 2-5 times more toxic than the outdoor air. Therefore, you should either prioritize choosing air conditioners with air purifying functions to filter the air. Or use the air conditioning for 2-3 hours, then turn it off and open the door for a certain period before using the air conditioning again.


Do not close the door tightly when turning on the air conditioning

Suddenly changing air conditioning temperature

One of the mistakes when using the air conditioning is frequently changing the temperature abruptly. It is not advisable for children to enter an air-conditioned room immediately after coming in from the sun or after engaging in strenuous activities and sweating heavily. Therefore, before leaving the room, you should let the child stand at the open door for a few minutes to allow the body to adapt to the hot air outside.

Using air conditioning in a power-saving way during the summer

Do not turn the air conditioning on and off frequently and remember to turn off the circuit breaker: When you have the habit of setting a very cold temperature, waiting for the room to cool down, then turning off the air conditioning and turning on the fan, and when you feel hot, turning on the air conditioning again, you should stop doing this. In reality, this is a mistake that wastes more electricity and can cause the air conditioning unit to break down quickly.


Do not constantly turn on the air conditioning

Choose the “dry” mode: According to TS Tran Van Thinh, Lecturer of Electrical and Electronic Equipment – Hanoi University of Science and Technology, when operating in the cool mode, the air conditioning unit extracts heat from the room and pushes it out to the outside unit, helping to reduce the temperature and cool the air in the room, requiring a significant amount of electricity. When you switch on the air conditioning in dry mode, it will remove moisture from the room, providing cleaner and drier air, resulting in less energy consumption compared to the cool mode.

Set a timer to turn off the unit: When using the air conditioning, it is advisable to use the timer function of the air conditioning unit to schedule the time for it to be turned off, especially at night. Setting a timer to turn off the air conditioning not only ensures a good night’s sleep without feeling cold, but also helps to save energy effectively.

Source: Khoevadep

Frequently asked questions

Yes, it is generally recommended to close windows when the air conditioning is turned on. This is to ensure the cool air is contained within the room, creating a comfortable environment without wasting energy.

Open windows can lead to a significant loss of cooled air, especially if the room is not well-insulated. This forces the AC unit to work harder and consume more energy to maintain the desired temperature. Additionally, open windows can let in hot air from outside, counteracting the cooling effect and putting more strain on the AC system.

Besides keeping windows closed, you can also ensure your AC is set to a reasonable temperature – not too cold. Regular maintenance and cleaning of the AC unit and filters are crucial for efficient operation. Consider using fans alongside AC to circulate cool air, and make use of curtains or blinds to block out direct sunlight during the hottest parts of the day.

Keeping windows closed with the AC on can lead to a buildup of indoor air pollutants if proper ventilation is not maintained. This can potentially cause health issues, especially for those with respiratory problems. It is important to occasionally open windows or ensure adequate ventilation to allow for fresh air circulation.

A good practice is to open windows during the cooler parts of the day, such as early morning or evening, and then close them when the temperature rises. This helps to naturally cool the room and improve air quality without relying heavily on AC. Additionally, consider investing in plants that improve indoor air quality, such as peace lilies or snake plants.