Did I just dodge an expensive bullet?

[kristopher]

10. A couple of important points

If you want an attic fan to help keep your house cool, there isn't enough insulation in the attic.

The primary purpose of attic fans is to keep the attic free of mold and mildew from moisture build up, and to keep the temperature from getting so hot that it reduces the life of your shingles. Moisture control has a big impact on how you do things like this, so you might want to familiarize yourself with the basics, starting in the crawlspace/basement and working your way up.

If your living space is heating up because the attic is hot, you might be more satisfied if you put down another 6 inches of insulation on the attic floor or covered what you have with reflective bubble wrap. Be sure the air flow from the eaves isn't obstructed and that there is sufficient flow out via something like ridge or gable vents. If there is a particular part of the attic that is getting moisture buildup because it is out of the general pattern of airflow, then something like the solar vent might be a good solution.