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1. You Aren’t Changing or Cleaning Your AC Filters

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At a minimum, you should be changing the filter on your central AC unit once every three months—and as often as once a month if your system is running all the time.

Neglect this chore, and a dirty filter can lead to poor air flow or freezing up of your unit’s evaporator coil. A filthy filter could add 5% to 15% to your AC bill, and will shorten the lifespan of your whole system. Fortunately, replacement filters are pretty cheap—usually less than Eur20.

If you have ductless “split” AC units, there should be a removable panel on your unit that will allow you to wipe off the filter with a rag—no replacement necessary.

2. You’re Not Having Your Aircondition Serviced Annually

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You could look up online video tutorials about cleaning your AC unit’s coils and fins—necessary maintenance operations that keep your system up and running efficiently, You could also bring in a pro to service your system once a year.

You’re Setting Your Thermostat Too Low

Research shows the human body is capable of adapting to hot or cool temperatures pretty quickly—like within a week or two.

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When you consider you’ll cut up to 3% off your AC bill for every degree you raise the temperature—not to mention the potential environmental benefits of lowering your AC use—it’s worth sweating through that adjustment period and setting your thermostat somewhere around 25C (or higher if you can handle it).

You’re Not Taking Full Advantage of Fans

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Any type of fan, but especially ceiling fans, can help keep cool air circulating throughout your home. That removes some of the burden from your AC system. Just be sure your ceiling fans are turning counterclockwise during the summer, which promotes greater air flow.

You Don’t Have Blinds Or Curtains

Bright sunlight is your AC system’s nemesis. By closing blinds and sliding curtains to block the sun’s rays, you’ll also shield your space from the sun’s heat, experts say.

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