The SolarVenti range of solar air heating dehumidifiers and ventilators, is the most exciting, 'green' innovation of this era for banishing problems of damp, cold and humidity in buildings and also providing FREE space heating. Damp house problems make themselves evident by a cold, stale and musty atmosphere and sometimes also by excessive condensation. SolarVenti air heating dehumidifiers and ventilators eradicate damp house symptoms by regularly and completely displacing and expelling the stale, damp, unhealthy air using the pressure of the warmed dry air from inside the SolarVenti unit. This is a controlled form of positive input ventilation. The stale, damp air is flushed away and completely replaced with fresh, sun-warmed, dry air at ZERO running cost while reducing your carbon footprint!