Row out of the water vapor from the home, so that fresh air flow 3. solar-powered by 10-15 w solar panels 4. Maximum ventilation capacity ranging from 800CFM to 1500CFM (or greater). 5. 12V brushless DC motor used, quick run; the life is up to 10 times than the brush motor; 50 thousand hours warranty of brushless DC motor (5 year warranty for the rest); the highest efficiency, sound quiet. 6. Mtal temperature controller, the choice of air temperature 15 °C-30°C and automatic on / off fan