Note that version 1.2 of the PEI Calculator is out-of-date due to updates to default motor losses. A new version will be released soon.

Overview: As part of HI’s Energy Rating (ER) Label Program, with support from member company Engineered Software Inc., HI has developed a calculator tool to aid the public and its members in determining the Pump Energy Index (PEI) according to Department of Energy (DOE) Regulations.

The calculator is a macro-enabled excel tool that is designed for manufacturers to use as part of their testing programs.  The tool walks the user through the calculation process according to the section of the DOE test procedure the pump was tested to.  Help text is provided explaining what each value means.

Version History Notes

• Version 1.2 corrects the presentation of significant digits to three for the PERSTD and PERCL
• Version 1.1 corrected calculation errors present in previous versions, which applied to the calculation of PEI for pumps that could not be tested to 120% of BEP.
• Version 1.02 made improvements to be compatible with Microsoft Excel 2007 and later.