Variable Speed Drive Calculators for Fans

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Nameplate Horsepower 50 
Nameplate Efficiency 81% 
Motor Load at Fan 0.95 
Annual operating hours 8000 
Existing Flow Control Inlet Guide Vane, FC Fans
Local Utility Rate ($/kWh) .08 

Fan Loading
Percent of Capacity
(cfm)
Percent of Time at
this Capacity
10% %
20% %
30% %
40% %
50% %
60% %
70% %
80% %
90% %
100% %