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01/05/2009 Energy Calculators Energy Calculator Home
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Hot Water Heating Calculator
Water Heater Characteristics
Physical Thermal
Diameter (feet) Water Inlet Temperature (oF)
Capacity (gallons) Ambient Temperature (oF)
Surface Area (ft2 Hot Water Temperature (oF)
Effective R-value Hot Water Use (Gallons/Day)

Energy Use
Heat Delivered in Hot Water (BTU/hr)
Heat loss through insulation (BTU/hr)

Gas Fuel Comparison Electric
Overall Efficiency
Conversion Efficiency 0.98
BTU/hr Power Into Water Heater BTU/hr 

Cost
$/Therm Utility Rates $/kwh
$ Annual Water Heating Cost $

Solar
Solar Water Heater Cost $ Percent Solar%
years for gas Payback Time for Solar System years for electric




The information provided by the Energy Calculators on this web site is for illustrative purposes only. Results depend on many factors, including the assumptions you provide. EnergyWindow does not guarantee their accuracy, or applicability to your circumstances.

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