The expert explained: "When you press this button it stops any air from outside coming through these vents, circulating the air inside the cabin." READ MORE: Americans told to avoid driving in two ...

Welcome to the Money blog, Sky News' consumer and personal finance hub. Today: oil prices hit a two-month high after Israel ...

According to Sleep Advisor, having a fan is actually a health risk due to it blowing air constantly around the room, including dust.