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Energy Cost Calculator for Faucets and Showerheads

Vary utility cost, hours of operation, and /or efficiency level.

INPUT SECTION
Input the following data (if any parameter is missing, calculator will set to the default value). Defaults
Water Saving Product    Faucet Showerhead
Flow Rate    gpm 2.2 gpm 2.5 gpm
Water Cost (including waste water charges)    $/1000 gal $4/1000 gal $4/1000 gal
Gas Cost    $/therm 0.60 $/therm 0.60 $/therm
Electricity Cost    $/kWh 0.06 $/kWh 0.06 $/kWh
Minutes per Day of Operation    minutes 30 minutes 20 minutes
Days per Year of Operation    days 260 days 365 days
Quantity to be Purchased    unit(s) 1 unit 1 unit
OUTPUT SECTION
Performance per Your
Choice
Base
Model
FEMP
Recommended
Level
Best
Available
Self Closing Faucet
(gallon per cycle)
WATER USE ONLY
Gallon per Minute     gpm            
Annual Water Use     gal            
Annual Water Cost $ $ $ $ $
Lifetime Water Cost $ $ $ $ $
WITH ELECTRIC WATER HEATING
Annual Energy Use     kWh            
Annual Energy Cost $ $ $ $ $
Lifetime Energy Cost $ $ $ $ $
Lifetime Energy and Water Cost Savings $ $ $ $ $
Lifetime Energy and Water Cost Savings for $ $ $ $ $
WITH GAS WATER HEATING
Annual Energy Use     therms            
Annual Energy Cost $ $ $ $ $
Lifetime Energy Cost $ $ $ $ $
Lifetime Energy and Water Cost Savings $ $ $ $ $
Lifetime Energy and Water Cost Savings for $ $ $ $ $

For electric water heating applications, your selection of an energy saving with a flow rate of gallon(s) per minute will have a combined energy and water cost savings (per ) of $ over an estimated 10 year life expectancy compared to the base model.

For gas water heating applications, your selection of an energy saving with a flow rate of gallon(s) per minute will have a combined energy and water cost savings (per ) of $ over an estimated 10 year life expectancy compared to the base model.

Assumptions

  • "Base model" has an efficiency that just meets the national minimum standard for faucets or showerheads.
  • Lifetime energy cost and lifetime water cost is the sum of the discounted value of the annual energy and water costs based on an assumed faucet or showerhead life of 10 years.
  • Future gas and electricity price trends and a discount rate of 3.2% are based on Federal guidelines.
  • $0.06 per kWh is the Federal average electricity price in the U.S.
  • $0.60 per therm is the Federal average gas price in the U.S.
  • The assumed combined water and waste-water price is $4.00/1000 gallons.

Disclaimer

This cost calculator is a screening tool that estimates a product's lifetime energy cost savings at various efficiency levels. Maintenance and installation costs do not vary significantly among the same product having different efficiencies; so, these costs are not included in this calculator tool. For a detailed life cycle cost analysis, The Federal Energy Management Program has developed a tool called Building Life Cycle Cost (BLCC). This downloadable tool allows the user to vary interest rates, installation costs, maintenance costs, salvage values, and life expectancy for a product or an entire energy project.