Calculating Ventilation Requirements

• The Federal Housing Administration has a simple formula for calculating the ventilation necessary for your attic. For every 300 square feet of floor in the attic, you need 1 square foot of ventilation. Divide this square footage evenly between intake and exhaust.
  
  

Types of Ventilation

• Ridge vents and power vents are a fairly low cost option for attic ventilation and blend with the roof of your house. Louvers and turbines are also options for attic ventilation.
  
  

Benefits of Ventilation

• A properly ventilated attic can help to control the temperature of your house and save on your energy bills. It can also keep moisture and mold from building up and rotting the wood.