Experts Warn: Setting AC Too Low Wastes Energy and Harms Health

Setting your air conditioner to its lowest setting when temperatures soar might seem like the quickest way to cool down, but experts warn this common practice is a misconception. It doesn't speed up cooling, significantly hikes electricity bills, and can even harm your health. The belief that a 18-degree Celsius setting cools a room faster than a more comfortable 24 degrees is false. An air conditioner always outputs air at a consistent, low temperature. The thermostat acts as a smart switch, signaling the compressor to turn on and off once the target temperature is reached. Choosing a lower temperature simply makes the compressor run longer, not faster or harder. The room will cool to 24 degrees at the same rate regardless of whether the target is 18 or 24 degrees. Energy agencies and experts recommend maintaining an indoor temperature between 24 and 26 degrees Celsius for a balance of comfort and efficiency. The ideal summer temperature also depends on outdoor conditions. Crucially, avoid a drastic difference between indoor and outdoor temperatures, ideally keeping it within seven to 12 degrees. Sudden shifts from heat to cold shock the body, leading to headaches, muscle stiffness, and respiratory issues, particularly dangerous for those with chronic conditions like heart disease. This energy-wasting habit also hits your wallet hard. Each degree lower on the thermostat can increase electricity consumption by six to eight percent. Setting the AC to 20 degrees instead of 25 could result in a 40 percent higher electricity bill, with no improvement in cooling speed. Continuously running the unit this way also overloads the compressor, the most expensive component, leading to premature wear and costly repairs. Fortunately, more effective cooling strategies exist. Instead of relying on low temperatures, use fans. While they don't cool the air, they create a wind-chill effect, making you feel several degrees cooler and allowing you to set the thermostat higher. Preventing heat from entering your home is also vital. Keep windows and doors closed during the hottest parts of the day, and lower blinds or curtains to block direct sunlight. Avoid using the oven and other heat-generating appliances.