Industrial Fans, Blowers & Air Movement Equipment worked example

Energy Cost at 72% included operating share: a worked example in industrial fans, blowers & air movement equipment

Suppose included operating share falls to 72%. This page works the full calculation at that level so you can see exactly which result moves and by how much. Estimate fan or blower energy cost from operating hours, energy cost per hour, operating share, and fixed demand or test charges.

The inputs for this scenario

  • Fan operating hours: 2,000 hr (held at the documented default)
  • Energy cost per operating hour: 11.5 $ / hr (held at the documented default)
  • Included operating share: 72 % (the input this scenario stresses; the baseline uses 100)
  • Fixed demand or test charge: 1,200 $ (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Variable fan energy cost = fan operating hours × energy cost per operating hour × included operating share.
  • Total fan energy cost works out to 17,760 $ at these inputs, and this is the headline figure for the scenario.
  • Energy cost per operating hour works out to 8.88 $ / hr at these inputs.
  • Variable fan energy cost works out to 16,560 $ at these inputs.
  • Fixed demand or test charge works out to 1,200 $ at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where included operating share sits at 100% and the headline result is 24,200 $, this scenario comes in 26.61% below the baseline at 17,760 $.
  • It computes total fan energy cost as run-time hours times hourly energy cost times duty share, plus any fixed demand or test charge. When the numbers land here, the stressed input is the lever to work; the walkthrough above shows exactly how much each output recovers as it climbs back toward the baseline.

Results at a glance

  • Total fan energy cost: 17,760 $ (headline result)
  • Energy cost per operating hour: 8.88 $ / hr
  • Variable fan energy cost: 16,560 $
  • Fixed demand or test charge: 1,200 $

Run it with your numbers

  • To rerun this with your own numbers, open the live Energy Cost calculator, set included operating share to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.