1, Energy saving 15% to 25%. 2, Blower can run for long time reliably. 3, Low vibration low noise. 4, Good performance. Features for BWT roots blower1, Energy saving 15 to 25% than marketing model. as adopted the energy saving motor which certificated by govermment.2, BWT blower has a better sealing performance, as adopted special sealing material. so air leakage amount is little, efficiency is ...