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Constantly Running Attic Fan?


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Dear Moss Building & Design,

Our attic fan seems to be running constantly – it’s noisy and somewhat disruptive as my children’s bedrooms are located upstairs. What can or should I do?

— Dulles Mom


Dear Dulles Mom,

Great question and very timely for the hot summer months. Attic fans are designed and installed to switch on (via a thermometer) when the temperature in a house reaches a certain point. Because of the attic’s location, it is always a hotter part of the house. With an attic fan that switches on appropriately (when the attic reaches a specific degree, somewhere between 105-120 degrees Fahrenheit), it serves to push the hot air out of the house and to help cool your home – the upstairs bedrooms can drop in temperature by almost 10 degrees. Which in turn then makes your air conditioner less likely to need to be running all the time, bringing your electric bill down.

If your attic fan seems to be running constantly, it would be a good idea to bring in a professional to check it out and make sure it’s still working properly. If the “switch on” temperature is set too low, you can bet that the fan will run all summer long and create a noisy disturbance. You might notice that, should you need a new fan or just have to have your current one serviced, your upstairs rooms are cooler and your electricity bill is lower. We would recommend you have it checked out sooner rather than later in July and August in the Northern Virginia area can be brutal!

— Moss Building & Design


Moss Building & DesignMoss-200-x-200 is the top home remodeling company in Northern Virginia that has established a reputation for excellence in remodeling additions, kitchens, bathrooms, and basements and providing home services for homeowners. With a strong focus on community, Moss Building and Design encourages a hands-on approach to home improvement with an emphasis on education. Their ‘Girls Night Out’ HandyMOM101 events offer DIY workshops covering projects like tiling, power drills, caulking, and patching drywall.

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