The RamFan EFi150 is a High Capacity Blower / Exhauster 16-Inch/40 cm (115/240v Wired 240v). The largest portable, ducted blowers for highest volume air movement. Use the EFi150 (1.5 Hp) model for higher velocities, increased volumes and reduced purge or cooling times. Durable EFi series fans have high strength, glass reinforced ABS housing. Stackable in storage or during operation.