Solar Attic Fans FAQ in Central Florida
Why should I ventilate my attic?
The most obvious reason for attic ventilation is to lower attic space temperature during the warmer months. Attic temperature can exceed 160 degrees Fahrenheit during hot summer days. Proper attic ventilation can reduce those temperature by 50 degrees. No matter how much insulation is in the attic, heat can still transfer into adjacent living spaces. In fact, extra insulation can actually add to temperature increases because heat is trapped in the insulation. Proper ventilation evacuates this excess heat build-up. As the heat is exhausted, the work of the air conditioning system is reduced, thereby, saving energy and extending the life of the air conditioning system.
What about winter, do I need it then?
Yes, Moist air is present in Florida year round. Humidity in attics causes mold and mildew to develop and moist air lingering in the attic spaces can condense on the underside of the roof sheathing and rot it out and also causes mold to develop on the interior walls.
Will ventilation do anything else?
Though asphalt shingles are designed to take the abuse of the sun for many years, they are subjected to greater temperatures when the roof decking is allowed to overheat, which is just what happens in an under ventilated attic. Asphalt shingle manufacturers warranties require proper attic ventilation.