How much does it cost to run a 220 ac window unit a month?

The cost to run a 220 AC window unit for a month depends on its energy efficiency, local electricity rates, and usage patterns. On average, if the unit consumes about 1,500 watts and runs for 8 hours a day, it could cost around $50 to $100 per month, given an average electricity rate of $0.13 per kWh. To get a more accurate estimate, check the unit's energy rating and your local electricity costs.