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Household Hacks & Home Maintenance · Jun 21, 2022 edition

Four AC Mistakes That Waste Energy

From the Genius House Hacks archive.

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As temperatures climb, so does your electric bill — unless you avoid these common air conditioning mistakes that waste energy without actually keeping you any cooler.

Setting the Thermostat Too Low

Cranking the AC to 60 degrees doesn't cool your home any faster — it just runs longer and costs more. Set it to the coolest comfortable temperature, typically around 78 degrees when you're home, and let the system do its job at a steady pace.

Closing Vents in Unused Rooms

It seems logical to close vents in rooms you're not using, but this can actually strain your system by increasing pressure in the ductwork, leading to leaks and reduced efficiency. Keep vents open throughout the house.

Skipping Filter Changes

A dirty air filter restricts airflow, forcing your system to work harder and use more energy. Check filters monthly during peak season and replace them every 1 to 3 months.

Running Ceiling Fans the Wrong Direction

In summer, ceiling fans should spin counterclockwise to push cool air down, creating a wind-chill effect that lets you raise the thermostat a few degrees without feeling it.

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