For those not reading the article: - The HN title is misleading. The real title is "When is it too hot to use a fan?" - The article explains: "The key point:

For those not reading the article: - The HN title is misleading. The real title is "When is it too hot to use a fan?" - The article explains: "The key point: Above 35°C, humidity matters a lot. In very dry conditions, a fan could be counterproductive, whereas in very humid ones it could continue to help at much higher temperatures." They quote two controlled studies that show the same results so there's no reason to debate this. It's just a bad title. There's nothing controversial here.