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Water Heater Efficiency And Savings Calculator
Use this calculator to calculate the annual operating costs & savings
of a higher efficiency natural gas water heater.
Based on a natural gas cost of $.70/therm
How Does Your Family Use Hot Water?
defaulted values represent a family of four
Natural gas price per therm
$
Number of showers per day
1
2
3
4
5
Minutes per shower
5
10
15
20
25
30
Automatic dishwasher loads per week
1
3
5
7
Hand-washed dish loads per week
0
2
4
6
8
10
12
Automatic laundry loads per week
0
1
2
4
6
8
10
Hand and face washes per day
1
2
5
10
15
Current water efficiency
Standard (.54 EF)
High-efficiency (.62 EF)
High-efficiency (.83 EF)