Well what s been found is that if you turn the attic fan on in the summertime that it depressurizes the attic but it doesn t stop there.
Attic fans worth it.
If the attic fan keeps the house cool enough so that the owners leave the ac off there is almost certainly an energy benefit.
Are attic fans worth it.
It ll reach down through the insulation it ll find all the little cracks and crevices in that ceiling space and it ll reach down into your house and it will start drawing off air conditioned air and actually drive up your cooling costs.
Of course if the attic fan isn t working correctly and is running all year long that would be a significant problem.
Good insulation reduces fan effectiveness.
However the utility of attic ventilation fans is actually quite a controversial topic.
The problem with making a definitive statement on attic fans is that every house is different.
If the attic fan increases the comfort level of the house it may be worth it.