... .High efficiency,Easy to operate,Low noise, 2.Used in furnance ,boiler,and forced ventilation ... draughting of different types of biomass boilers. 2. Structure Main parts:Case,Impeller,Motor, ... Product Performance Impeller TypeDriving ModeSpindle Speed(r/min)Air Volume(m3/h)Total Pressure(pa)Motor(kw ... use air inlet itself bolt connection, the air inlet of fixed by three countersunk screw3. Diffuser be ...