EnergyWindow, Inc:, Water Heating Calculator

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In the meantime, here's an Excel spreadsheet that provides comparable functionality.

01/05/2009

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.