Air collector OS10 Solar air heater, air ventilator with mechanical thermostatNakoair Solar air heater No cost for heating Ventilation Dehumidification Humidification A healthy indoor climate. Avoid moisture, mold, fungus, formaldehyde (HCHO), TVOC, benzene, ammonia, odor. Nakoair solar collectors provide you with a healthy and warm home and automatically processes indoor air. When it's a sunny day, OS10 20 30 will heat outdoor fresh air all the time. Runs completely independent of the grid. Applications: Holiday Homes;