1.KRV -20D 2.Wind volume: 2000 m3/h 3.Residual pressure:200Pa 4.Power: 980 W 5. Noise level:45dB(A) Product:KRV SeriesMaterial:Paint Cold-rolled sheet Core: Paper coreFeatures: 1.Indoor and outdoor two-ways ventilation, equivalent exchanger of fresh air; 2.Low noise desigh, corrosion and high tempreture resistant; 3.Paper core:high moisture-permeating rate, good air-tightness, tearing-resistance ...