This award winning Attic Fan by Suntunnel is possibly the best and simplest application of solar energy to date. Reduce your cooling costs and protect the structural integrity of your roof by using the sun's energy to vent your attic, even during power outages. Poorly vented attics can reach temperatures as high as 140 degrees. This not only contributes to the degradation of your roof, but may add up to 40% to your air conditioning costs.