The AHE series provide the house with warm or cool filtered,clean,fresh air,meanwhile they recover the used indoor heat or cool. 1, air flow 600M3/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 ...