Basement Ventilation System – Basement ventilation system is responsible for two things, basically: damp expel moldy air and let in a fresh air from outside. However, these systems are expensive and consist of extractors connected to ventilation ducts. You can get same result if you build your own ventilation system with exhaust fans in windows; these are installed in small windows, typical of those found in basements, and leave to enter or expel air, according to type of fan you have.
If an air exchange basement ventilation system is not an option for you, a simple fan and dehumidifier combination can meet your basement ventilation system. A fan can expel moist air of house if ventilated properly. A portable fan box can be placed in a bulkhead or door to outside, but note that doors should be open to moist air can escape. A dehumidifier is perhaps a more effective method. This device absorbs moisture in air and trapped in a tank inside its shell. It is important to choose a dehumidifier is proper size for basement where it will be placed. A dehumidifier that is too small enough moisture in air to be effective will not pull. A dehumidifier tank must be emptied regularly to avoid overflow.