The HF series are the most powerful fans that can be easily used for negative or positive pressure ventilation.  Running at 3500 rpm, they have the power to force or pull air deep into a structure or underground vault.  A hazardous location motor listed for Class 1, Group D on the F series is also available.  The efficient design of these fans includes Super Vac's patented propeller which produces a much greater intake of air into the vacuum side, eliminates turbulence at the tips, and provides a high velocity screw action that sweeps air back over the motor.

Model#       Motor        Voltage    Amps    RPM   Weight   Shroud<CFM>Venturi
HF164   1.5Hp TEAO   115/230    17/9      3450      44#      4950                9620

Note: This model (HF164 and HF164E) require a 20 amp circuit to start and run.
         F series available in 3-phase versions also.