DIY Sub Floor Fans - Dealing with our damp Aussie homes

This system is designed to exhaust damp trapped air from the sub-floor and introduce fresh air in through existing, or new, passive vents. Once the subfloor is properly ventilated, the mould and mildew issues will decrease as this cuts off the source of the dampness entering your home from this area. xchange air also have second solution (see below) which can be used in conjunction with, or alternatively to, subfloor ventilation fans.