The earliest sunrise of the month in Dublin is 5:41 AM on August 1 and the latest sunrise is 51 minutes later at 6:32 AM on August 31. The latest sunset is 9:20 PM on August 1 and the earliest sunset is 1 hour, 4 minutes earlier at 8:16 PM on August 31.
1.2 kWh x $0.25 = $0.30 per hour to run your window air conditioner. At 8 hours a day for 125 days of summer, your window air conditioner will have an annual running cost of $300 a year.
In fact, ENERGY STAR room air conditioners use 10 percent less energy and, on average, cost less than $70 per year to run. New ENERGY STAR room air conditioners come with better materials and clearer instructions to improve sealing and insulation around the unit, so costly and uncomfortable air leaks are minimized.