Converting Uniform Energy Factor (UEF) to Energy Factor (EF)

Use the attached spreadsheet to convert from a Uniform Energy Factor (UEF) to an Energy Factor (EF).

To find the listed UEF or EF of your appliance, check the product documentation or search for your appliance on the AHRI directory. 

If your rating is using a commercial hot water heater, then it will be necessary to calculate an EF given the commercial DHW spreadsheet below.