Is an Attic Fan Worth It?

Find out whether it is economical to run an attic fan. Attic fans are not recommended if you have central air conditioning because when you turn the fan on in the summer, it depressurizes the attic but also reaches down into your house and starts drawing off air-conditioned air, effectively driving up your cooling costs. Instead of installing a fan, just make sure your attic is well-ventilated using passive vents. The most preferred are ridge vents and soffit vents.