Do Attic Fans Use a Lot of Electricity?

Do Attic Fans Use a Lot of Electricity?

Energy efficiency has become a hot topic, especially in recent history.

Aside from the environmental impact of using a ton of electricity, there’s also a lot to be said for how much conserving energy can save you on your electricity bill.

One of the biggest energy drains is central air conditioning. If you live in an especially hot climate, you can expect to pay hundreds just to keep your house cool.

Luckily, there are alternative ways to cool your home for a lower price. Is an attic fan one of them?

Here, we look at the facts and answer the question: do attic fans use a lot of electricity?

How much power does an electric attic fan use on average?

So just how much electricity does an attic fan use?

On average, an attic fan uses less than 300 watts of electricity.

If it were to run constantly, it would use up to about 180 kWh per month.

Unfortunately, this cost can add up. Though operating an electric attic fan costs an average of $2-$3 a month, adding a humidistat that measures the amount of moisture in the attic can add another $90-$150.

Attic fans vs other household appliances

When you compare the electric attic fan’s energy usage to the around 350-7500 watts that most of your other electric household items use, it seems pretty efficient.

The average refrigerator 1.4kWh of electricity per day or 41kWh per month.

A space heater uses a significant amount of electrical energy, about 1,500 watts.

A microwave uses about 1,200 watts per hour, though you probably don’t run your microwave for hours at a time.

Does an attic fan use less electricity than AC?

One of the primary reasons people use attic fans is to keep their homes cooler during the hot summer months. So, does it use less electricity than running your central air conditioning system?

The answer is a resounding yes. When in cooling mode, a central air conditioning system can use upwards of 3,500 watts per hour. Even when your AC is on fan-only mode, it still uses 750 watts per hour, more than twice the electricity of the average attic fan.

By adding an attic fan to the equation, your central air conditioning system has to do less work, which means less electricity is used. Essentially, you get more bang for your buck when using an attic fan.

A solar-powered alternative to the electric attic fan

If you’re looking for a way to get the cooling benefits of an attic fan without incurring additional energy costs, the answer is clear: solar power.

There are plenty of solar-powered attic fans out there that double down on savings, allowing you to save on AC electricity while using the sun to power the fan itself.


When compared to other household items, attic fans don’t use a lot of electricity. By adding an attic fan to your home, you could save a lot of money on your next electricity bill.