Relatively low energy-efficiency (55–65%)Ĭan operate with changing static pressure (as this does not overload the motor) (2) Only suitable for clean service applications but not for high pressure and harsh services (2)įan output is difficult to adjust accurately (3)ĭriver must be selected carefully to avoid motor overload because power curve increases steadily with airflow (4) Low noise level (due to low speed) and well suited for residential heating, ventilation, and air-conditioning (HVAC) applications Only suitable for low–medium airflow ratesĬan move large air volumes against relatively low pressure (2) Have large running clearances, which is useful for airborne solids (dust, wood chips and metal scraps) handling services Simple design allows custom-build units for special applications (3)Ĭan operate at low air flows without vibration problems (4) ![]() ![]() Suitable for high static pressures and high temperatures (2)
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