Diagram of input watts and losses to make air power: control 10%–15%, motor mechanical 5%, motor electrical resistance 10%–15%, drive 5%–10%, aerodynamic 25%–35%, and acoustic 5%.

Figure 6-5. Sources and typical percentages of fan efficiency losses.

Diagram of input watts and losses to make air power: control 10%–15%, motor mechanical 5%, motor electrical resistance 10%–15%, drive 5%–10%, aerodynamic 25%–35%, and acoustic 5%.

Source: NC State University.