Vary equipment size, energy cost, hours of operation, and /or efficiency level.

INPUT SECTION
Input the following data (if any parameter is missing, calculator will set to default value). Defaults
Type of Water Heater    Electric
Average Daily Usage (gallons per day)*    gallons 64*
Energy Factor†    0.92 (electric)
0.61 (gas)
Energy Cost  $ /  $0.06 per kWh
$.60 per therm
Quantity of Water Heaters to be Purchased    unit(s) 1 unit
* See assumptions for various daily water use totals.
† The comparison assumes a storage tank water heater as the input type. To allow demand water heaters as the comparison type, users can specify an input EF of up to 0.85; however, 0.66 is currently the best available EF for storage water heaters.

OUTPUT SECTION
Performance per Water Heater Your
Choice
Base
Model
FEMP
Recommended
Level
Best
Available
New Energy Factor             
Annual Energy Use             
Annual Energy Costs $<> $ $ $
Lifetime Energy Costs $ $ $ $
Lifetime Energy Cost Savings $ $ $ $
Lifetime Energy Cost Savings for Water Heater(s) $ $ $ $

Your selection of a water heater using gallon(s) per day will have a $ energy cost savings per water heater over an estimated 13 year life expectancy compared to the model.