1, air flow 150 M3/h, 200 M3/h, high heat recovery efficiency, 2, can chose regular AC motor or ECO DC motor 3,automatic bypas 1, air flow 150 M3/h, 200 M3/h, high heat recovery efficiency,2, can chose regular AC motor or ECO DC motor3,automatic bypass is available4, preheating is available5,intelligent defrost6,painting is option7,super slim for small space8,varied controller9,CO2 detector is ...