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Water Heater Characteristics
Physical
Thermal
Diameter (feet)
Water Inlet Temperature (Degrees F)
Capacity (gallons)
Ambient Temperature (Degrees F)
Surface Area (calculated - sq ft)
Hot Water Temperature (Degrees F)
Effective R-value
Hot Water Usage (Gallons per Day)
Energy Use
Heat Delivered in Hot Water (BTU/hr)
Heat loss through insulation (BTU/hr)
Gas vs. Electric Water Heating
Gas
Electric
Overall Efficiency
Conversion Efficiency
0.98
Power Into Water Heater
BTU/hr
Cost
Utility Rates
$/Therm
$/kWh
Yearly Water Heating Cost
$
$
How Does Solar Compare?
Solar Water Heater Cost:$
Percentage Solar:
years for gas
Payback Time for Solar System
years for electric
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