Billcorp recommends The EcoFan. The EcoFan features an interchangeable exhaust or inward air flow capability. When two EcoFans are installed in the sub floor, the cross flow of air is achieved to allow effective ventilation and improve underfloor air quality problems.
Cross flow ventilation is achieved by setting one EcoFan to exhaust stale, damp air from the underfloor areas into the external environment, and the other to bring fresh, better quality air into a under floor space.
The product has three speed settings that can be set to low, medium or high to suit seasonal variations and specific circumstances in the home.
The EcoFan also features humidity sensors that detect the humidity levels and adjust the settings of the EcoFan accordingly to effectively help reduce damp, mould and mildew growth.