Air purifier Mode: RS-ERV-35W Size:1075*779*280mm Installation size: 720*815mm Duct diameter 150mm Power: 220V 50Hz Here have three levels: low, midand high Low mid high Air volume: 160m3/h 250m3/h250m3/h Suitable area: 20-35sqm 40-60sqm 50-75sqm Static: 30Pa 65Pa 85Pa Heat recovery: 75% 72% 72% Enthalpy recovery:60% 58% 58% Power : 31kgs Noise: 31dB(A) 33dB(A) 35dB(A) Air pollution discharge through toilet, fresh air filtration consists of sitting room, bedroom, study unceasingly, makes such place into the air in an airtight room full of updates