PlantCalcKit
Home › Online tools › Fan and Blower Performance
Online tool

Fan and Blower Performance — online

How efficient is your fan really, what is the wrong air density costing you, and what would a variable speed drive save?

Status
Loading
Loading…
Unlock results
3 runs — USD 9Monthly — USD 15Yearly — USD 99
Compare the options
Already have a licence key?
Sheet

Yellow cells are inputs; orange cells are choices; blue cells choose the unit. Select or hover over an input to see its help in the box below the toolbar. The sheet is the same as the Excel tool (USD 39) — the Guide, method and references are in the Excel file.

Input help: select an input to see what it means and which units it takes.

What this fan and blower performance calculator does

Fan and blower efficiency from airflow, pressure and motor power: density correction, fan laws, motor loading, and the yearly energy and cost of damper, inlet vane and variable speed control.

  • Total and static efficiency. From fan pressure, airflow and shaft power, with the compressibility coefficient, in the style of AMCA 210 and ISO 5801 definitions.
  • Motor loading. Motor loss model with load, efficiency at that load, overall efficiency and specific fan power.
  • Air density. From temperature, humidity and barometric pressure or altitude, as moist air, or enter your own.
  • Fan laws. New flow, pressure, power, motor load and tip speed for a new speed, impeller diameter or air condition.
  • Flow control comparison. Outlet damper, inlet vanes and variable speed over up to four flows with hours per year, energy and cost saved.
  • Selectors. Efficiency basis, pressure and power measured, density source and control method; rows you do not need disappear.

How it was checked

About 195 recalculated runs against an independent Python model (moist-air density by mole-fraction mixing, numerical root finds): all 48 selector combinations, SI, US, British and industry units and 135 edge cases; largest deviation 0.00004 %.

Related

Questions

Is the fan and blower performance calculator free?

You can enter and check all your data free. The full results, findings and printable sheet are unlocked with a 3-run pack (USD 9), a monthly subscription to all online tools (USD 15) or a yearly one (USD 99).

Are the results the same as the Excel tool?

Yes. The online tool runs the formulas of the Fan and Blower Performance Excel workbook and was checked cell by cell against the Excel file.