O ur world is getting hotter . Summer heatwaves are so frequent, they’re stretching the bounds of what we think of as summer. Hot-and-bothered home working and sweaty, sleepless nights are now alarmingly common. Get a good fan and you can dodge the temptation of air conditioning. Aircon is incredibly effective, but it uses a lot of electricity … and burning fossil fuels is how we got into this mess in the first place. Save money and carbon by opting for a great fan instead. Fans are much more energy efficient than aircon. A typical portable air conditioner uses 1,000W of electricity, which would cost about 26p an hour to run. The fans I tested used between 8W and 60W; my favourite, the AirCraft Lume , used 18W on its top setting. You could run it on max for 56 hours, and it would still use no more electricity (money, carbon) than a single aircon unit going for an hour. I tested 16 fans of all shapes and sizes, so you can pick the best one for you.…