Question: how much does it cost to run a window unit all day?
Answer: The cost to run a 5-amp, 5,000-Btu air conditioner over a 24-hour period is about $1.60. Divide the cost per day by how many hours in a day to get an hourly cost amount. For example, $1.60 divided by 24. The answer shows that it will cost 6 cents to run every hour.