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## Main Question or Discussion Point

Hello,

I have a question about calculating input power.

Does the following formula work?

Shaft Power (Supply) / Motor Efficiency? We are trying to calculate what an existing fan is using but do not have assess to site. We have the shaft power and motor efficiency from the manufacturers data sheets.

Fan shaft power = 3.46KW

Motor Efficiency = 87%

Rated Power 7.5KW

Appreciate your input.

I have a question about calculating input power.

Does the following formula work?

Shaft Power (Supply) / Motor Efficiency? We are trying to calculate what an existing fan is using but do not have assess to site. We have the shaft power and motor efficiency from the manufacturers data sheets.

Fan shaft power = 3.46KW

Motor Efficiency = 87%

Rated Power 7.5KW

Appreciate your input.