Fans vs. Air Conditioners: Which Is Better to Beat Heatwaves?

When temperatures soar during a heatwave, many people rely on either electric fans or air conditioners to stay comfortable. While both can provide relief, they work in very different ways and are not equally effective in extreme heat. Fans improve airflow and help sweat evaporate, whereas air conditioners actively lower indoor air temperature and humidity.

Choosing the right cooling method depends on the temperature, humidity, your health, energy costs, and whether you"re facing a mild hot day or a dangerous heatwave. Here"s an evidence-based comparison of fans and air conditioners to help you make the safest choice.a