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I am not a big fan of attic fans. They're better than no ventilation but the controls burn out far too often. A ridge vent combined with vents under the eaves is a far better solution IMO.
Basically a ridge vent is created by cutting off a couple of inches of the sheathing under the shingles on either side of the point of your roof. A section of ridge vent material is attached over the hole to prevent the elements from entering the attic. If you don't already have them, vents need to be placed in the eaves of your house (that section of the roof that hangs over the walls). There needs to be a pathway of uninterrupted air flow from the eaves past any insulation at the top of the walls. Then the natural convective currents will allow hot air to go out the ridge vent while cooler air is brought in through the eaves.
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Strive to be more curious than ignorant.
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