Are Attic Fans A Good Idea?

Can you run an attic fan with the AC on?

Essentially, you can use your AC unit and your whole house fan together.

However, if the air outdoors is cooler than the air indoors, it doesn’t make a whole lot of sense to turn your air conditioning system on.

Using a whole house fan reduces the need for air conditioning..

Does an attic fan reduce humidity?

Attic temperatures can reach upwards of 150 degrees in the summertime, and an attic fan can help evacuate the hot air and humidity that can build up. … Installing an attic fan to vent the hot air will reduce the workload on your air conditioner, which in turn reduces your energy costs and saves you money.

When should you use an attic fan?

An attic fan can be used to cool down your living space any time the air outside is cooler than the air in your home. An attic fan pulls air in through open windows and doors while pushing hot air out of the home through attic vents.

Why are attic fans bad?

If there are not enough soffit, gable or ridge vents, a powerful attic exhaust fan can pull the air from your home through the ceiling if it is not perfectly sealed off. Strong attic fans can actually back draft furnaces or water heaters by pulling combustion gases out of their burners and into the home.

Do attic fans save you money?

The intention of the ventilation fan is to save energy and the roof. Energy would be saved by reducing the burden of the air conditioner in the home. The roof would be saved by decreasing the amount of heat moving from the attic through the roof.

How can I cool down my attic?

Install electric ventilators and attic fans, which remove hot air from an attic. They have thermostats that turn the fan on at a recommended preset temperature of 100-110 degrees. Alternatively, install passive vents such as gable, soffit and ridge vents, which are openings in the roof that allow hot air to escape.

What temperature should attic fan be set to?

Most attic fans operate with a thermostat that automatically turns the fan on and off based on a temperature the homeowner sets. Most manufacturers and contractors recommend a temperature setting between 100 and 110 degrees Fahrenheit.

Should I run my attic fan in the winter?

THE BENEFITS OF AN ATTIC FAN IN WINTER It’s true. An attic fan in winter can help prevent ice dams, reduce moisture in your attic during winter months, and prevent mold and mildew buildup due to moisture problems in the attic.

How much electricity does attic fan use?

The average attic fan draws less than 300 watts, making it seem like an energy-efficient home improvement, but some professionals in the field claim that attic fans are not a cost-saving investment.

How do you tell if your attic is properly ventilated?

Here are four signs of an unventilated or under ventilated attic:Look at your eaves and roof. … Touch your ceiling on a warm, sunny day. … Thick ridges of ice on your eaves in winter are a sign of poor attic ventilation.More items…

Is a hot attic dangerous?

In the summer, attics can overheat. In fact, it’s not uncommon for a 90-degree to translate to temperatures 30 or 40 degrees hotter in the attic. That’s dangerous because the extra heat can damage roof tiles and any items you have stored in the attic.

Do attic fans really help?

Attic Fan Ventilation However, if your attic has blocked soffit vents and is not well-sealed from the rest of the house, attic fans will suck cool conditioned air up out of the house and into the attic. This will use more energy and make your air conditioner work harder, which will increase your summer utility bill.

Is it OK to run an attic fan all night?

Only use it when the outdoor air is cooler than your indoor air. Make sure your AC is off when you run the fan or you’ll be blowing expensive AC air right out of your house! We recommend running your whole house fan all night long.

Should my attic fan run all the time?

Run the Fan all Day Run the attic fan during the daylight hours during warm summer weather. Sunlight on a roof produces heat in the attic. Running the fan when the energy of the sunlight is striking the roof removes the heat that accumulates in the attic.

Does an attic fan help with cooling?

Attic ventilation fans help cool air your attic by pushing out the stifling hot air from inside the attic and bringing in cool air from outside. This prevents hot air from seeping into your home and driving up the temperature in the living space, which reduces the load on your air conditioner.