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CHANGING THE CURRENT

CHANGING THE CURRENT

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Take 3 minutes to help your neighbors in need

You can help your neighbors in need right now by visiting www.SupportLIHEAP.org. In less than three minutes, you can contact your members of Congress to urge their support for continued funding for the federal Low Income Home Energy Assistance Program (LIHEAP).      Relief from the heat isn’t always as easy as adjusting the thermostat, […]

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Robotics competition excites future engineers, computer scientists and other high-tech professionals

For the second year in a row, I’ve had the pleasure of supporting the FIRST Robotics South Florida Regionals Competition, an incredible combination of hard work and pure fun. You may wonder what a high school robotics competition has to do with maintaining Florida Power & Light Company’s current fleet of modern fuel-efficient power plants. […]

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Together, we're always ready when you need us most

On the ten-year anniversary of Hurricanes Charley, Jeanne and Frances, our Vice President & Chief Communications Officer, Rob Gould, shares his thoughts on what we’ve learned during the past ten years and how our new partnership with the Florida National Guard is one way we’re doing our part to be ready when the next major […]

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2014 Power to Care Makes A Difference Across the State

There’s nothing like helping someone else. Studies show that the more people volunteer, the happier they are. It connects you to others, it’s good for your mind and body, it’s fun! This past week, more than 1,300 NextEra Energy employees and their families in Florida were able to get out and do something nice for our […]

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Ensuring Reliability

Getting your life back to normal faster after a storm

As president of Florida Power & Light Company, Eric Silagy leads the thousands of employees who bring affordable, reliable power to you every day. He’s raising his family here in the sunshine state, something that fuels his drive to always look for ways to make tomorrow better for all of us. If you’ve experienced a […]

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Old Poles Have New Life as Artificial Reefs

If you’re a local diver, angler and anyone who loves the ocean, I’ve got good news. You can now enjoy two new artificial reefs that were created using a donation of concrete FPL poles, right off the coast of St. Lucie County. Consider it  a new take on recycling! One of the things I love […]

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Restoring power -- anytime, anywhere

From time to time, you may see an FPL truck parked near your home late at night, possibly even when your power is working just fine. Don’t be alarmed. Our crews work around the clock to restore power, and they may need to work on equipment located near you to resolve an outage in your […]

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Energy Efficiency

Students see solar energy in action

Schools across Florida are using our state’s sunshine to help power classrooms and teach kids about clean energy. Through FPL’s Solar Pilot Program, nearly 100 schools and other educational facilities will be getting special solar-panel displays by the end of 2014. While installing solar panels can be out of reach for many Floridians, these facilities […]

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Craig Muccio

About "Ask the Energy Expert"

Craig Muccio runs FPL's Conservation Research & Development Program and crunches the numbers to figure out how you can save by managing your energy use.

Your questions on energy-related topics can be submitted anytime to our Ask the Energy Expert blog. Just click here to submit your question, and if chosen, it will be answered here

A/C fan switch – “on” or “auto”? Which saves the most money?

By Craig Muccio

Asked on: August 28, 2014 by Beverly H., Weston

Which A/C fan setting costs more, “on” or “auto?” My friend believes the “auto” setting uses more electricity.

That’s actually a common, but important question. The on/auto fan switch on your A/C thermostat will affect the price you pay to cool your home. The A/C fan circulates the cooled or heated air throughout your home. Setting the fan switch to “on” will make the A/C fan run continuously, 24 hours a day. Choosing the “auto” setting will cause the fan to shut off with the rest of the cooling system as soon as your desired temperature on your thermostat is reached.

Fan “on” costs more
Advice from friends can be helpful, but in this case your friend was mistaken to think that the auto setting used more electricity. Let’s assume your air conditioner normally cycles off 30 percent of the time. In this example, turning the fan switch to “on” will make the fan run over 200 extra hours a month. For a typical size central air conditioner, that would cost you about $8 more each month. Keep in mind, a fan that runs all the time may also wear out sooner.

Another reason to keep it on “auto”
Setting your A/C fan to auto also helps provide better dehumidification. Have you noticed how moisture from the air condenses on the outside of a cold drink on a humid day? Your A/C unit captures moisture the same way, helping your home feel more comfortable. When the fan cycles off using the auto mode, moisture has a chance to drip from the cold cooling coils into the condensation pan and then drain outside. However, when the fan runs all the time in the “on” setting, less moisture has a chance to drip and drain outside. Instead, some gets blown back into the air again.

Some people prefer the feel or sound of the fan running all the time. If that’s you, at least now you know how much that choice will cost you.

Learn how to save even more
During Florida’s hottest months, we want to remind you that you can save five percent on your monthly cooling costs for each degree you turn your thermostat up. Also, our top summer tips can help you save even more.

You can also take our Online Home Energy Survey to get a personalized savings plan filled with energy-saving tips and recommendations. It’s easy, and can save you up to $250 a year.

Did you find this Ask the Expert column helpful? Get more expert energy saving advice by following our Ask the Expert column monthly and remember you can submit your own question.

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FPL reserves the right to edit any user submissions to "Ask the Energy Expert" for brevity or clarity. Publication of readers' questions or comments is at the sole discretion of FPL.