One of the major problems that exist, especially in older homes but also in the new ones, is the ventilation. You need the right balance of ventilation for the square footage of your house. Too much ventilation, you will create a negative pressure on your home. Too little ventilation, you can have moisture in the attic resulting in mold. The sheeting of your house can be warped therefore, adding an extra cost on the repair of your house. The proper ventilation of your house helps on your energy bills and a good quality of the overall air on your house.