Comparison : Item # 1544, Envirco® MAC 10® LEAC 900 Cubic Feet per Minute (ft³/min) Maximum Air Flowrate Fan Filter Unit
Item # 1545, Envirco® MAC 10® LEAC 900 Cubic Feet per Minute (ft³/min) Maximum Air Flowrate Fan Filter Unit
Item # 1574, Envirco® MAC 10® LEAC 900 Cubic Feet per Minute (ft³/min) Maximum Air Flowrate Fan Filter Unit
Item # 1575, Envirco® MAC 10® LEAC 850 Cubic Feet per Minute (ft³/min) Maximum Air Flowrate Room Side Replacement Fan Filter Unit
Item # 1576, Envirco® MAC 10® LEAC 850 Cubic Feet per Minute (ft³/min) Maximum Air Flowrate Room Side Replacement Fan Filter Unit