Why An Attic Fan Should Be Installed Why ventilate the attic?
For very good reasons! The hot summer sun, beating down on the roof of the average home, makes a veritable furnace of the space under the roof. Unless some means of dissipating this heat is provided, it radiates down through the ceiling into the rooms below. Long after the sun has set and outside temperatures have dropped many degrees, these rooms continue to receive this accumulation of heat. The dark, composition roof coverings used on over two-thirds of the homes built today absorb a greater amount of the sun’s heat than did the wood shingles used in the past century. While insulation retards the downward flow of this heat, it cannot prevent uncomfortable temperatures in the rooms below. And unfortunately, though insulation is an asset to every home, it is as effective at holding heat inside the home in summer as it is in winter. Natural ventilation of the attic space cannot keep pace with the heat load being absorbed by the roof. As summer progresses, there is an increasing accumul
