April 14, 2022
Open Window in Amherst, NY

Ensuring your home stays cool and comfortable during the summer can be costly. For this reason, many people attempt to reduce their cooling costs by only running their air conditioner as little as possible. One such option is to open your windows at night instead of using the AC. Still, the question is whether or not this will actually save you money?

Estimated Energy Savings from Turning AC Off at Night

It probably won’t surprise you to learn that a central AC system uses far more energy during the day than at night. In hotter, more humid climates, somewhere around two-thirds of the system’s total energy consumption occurs between the hours of noon and midnight.

Adjusting Thermostat

This percentage can be even greater in milder climates like Upstate New York since the evenings tend to be fairly cool. In this case, as much as 75% of the total energy consumption will occur during daytime hours. Studies have shown that, on average, shutting off your air conditioner at night will reduce your total cooling costs by somewhere around 30% compared to leaving it turned on 24 hours a day. However, this depends in large part on how warm it is at night as well as the humidity level.