As well as posing a potential fire risk, leaving a fan running all night could pose some health risks as well. The rapid air movement caused by a fan can dry out your mouth and nasal passages, your eyes and can even cause dry skin conditions, according to Mark Reddick from Sleep Advisor.

Do Fans Use a Lot of Electricity? Running a fan takes a lot less electricity than running an air conditioner; ceiling fans average at about 15-90 watts of energy used, and tower fans use about 100 watts.

Circulating air from a fan can dry out your mouth, nose, and throat. This could lead to an overproduction of mucus, which may cause headaches, a stuffy nose, sore throat, or even snoring.

Less frequent starts and stops of the fan can reduce the stress from startup, and potentially help extend it’s lifespan. Leaving the fan on 24/7 ensures cleaner air, as the air is pulled through the filtration or UV light system. This can be better for people with allergies.

The equation is: Cost = power (kilowatt) × time (hour) × cost of 1 kWh (pence). According to Energy experts spoken to by The Sun the average cost of running a fan for 12 hours a night would come in at between 7.76p to 15.59p.

While ceiling fans don’t eat up a significant amount of energy (which is why so many people take advantage them for their homes), they do still contribute to the cost of your electricity. Additionally, running the motor of your ceiling fan can actually add heat to the room.

How much does it cost to run a TV 24 7? Watching television will generally cost between 16 cents and 30 cents for the standard model. Smaller and more energy-efficient TVs will cost a bit less to run – between 7 cents and 18 cents per hour.

Leaving a modern TV in standby mode won’t significantly increase your electricity bill, but it’s still a waste of money. If you want to lower electricity use while the TV is off or on here’s what you should do. At night completely power off the TV (and other entertainment center devices).