Attic Ventilator
An attic ventilator usually provides this needed service. Since the attic
is separate from the sealed part of the house that receives warm and cold
air from the furnace and air conditioner, it is the ideal place to circulate
indoor air outside, and outdoor air inside, to break up air pockets that can
nurture mold, bacteria, and other unwanted germs. If your attic ventilator,
which is usually perched on the highest point of the attic, proves
inadequate, you may want to consider adding soffit vents beneath the eaves
and used with a continuous ridge vent for maximum airflow.