What is the ideal temperature for an attic?
A good rule of thumb is 100 degrees or less. A poorly ventilated attic can have temperatures that reach above 160 degrees. Even an attic with a convection fed system (ridge and soffit vents) can reach between 140 and 150 degrees. When an attic temperature gets above 100 degrees the heat is drawn toward the living space through the insulation and has a detrimental effect on the air handler and duct work in the attic. A powerful ventilation system along with the proper intake air is capable of keeping your attic around 100 degrees on a 90 degree day.
