Calculate Savings - Niagara Water Temperature Card

water temperature card savings calculations

Estimated savings based on assumptions below

	Per Year	Lifetime
Dollars Saved	$16.13	$241.88
Kilowatt Hours Saved	137	2,050
Gallons of Water Saved	0	0
Trees Planted	0	1

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Niagara Water Temperature Card

Utility Costs and Usage

surface area of water heater	sq ft
temp of hot water	°F
water heater surrounding temperature	°F
water heater R value
water heater efficiency %

type of water heater	gas electric
cost per kilowatt hour
cost per therm
cost per CCF
cost per cubic meter
1 CCF = 103,100 BTU = 1.031 therm 1 m³ = 35.31 ft³ = 0.3531 CCF

Step 1 determine heat loss at current temperature

37.5 sq ft x (140 hot temp - 70 ambient air temp) / (16 water heater R-value + 0.6 air film R-value) = 158.13 BTU/hr

Step 2 determine heat loss at new temperature

37.5 sq ft x (120 new hot temp - 70 ambient air temp) / (16 water heater R-value + 0.6 air film R-value) = 112.95 BTU/hr

Step 3 determine heat loss savings

158.13 current heat loss - 112.95 new heat loss = 45.18 BTU/hr heat loss savings

45.18 BTU/hr / 85% = 53.15 efficiency-adjusted savings

Step 4 convert to kW

53.15 BTU/hr / 3,412 BTU/kWh = 0.0156 kW

Step 5 determine energy savings

0.0156 kW x 24 hrs/day = 0.3744 daily kWh

0.3744 kWh/day x 365 days/year = 136.656 yearly kWh

136.656 kWh/year x 15 year lifespan = 2049.84 lifetime kWh

Step 6 determine money savings

136.656 yearly kWh x $0.118 = $16.13 yearly savings

2049.84 lifetime kWh x $0.118 = $241.88 lifetime savings

Savings calculations are presented as an example of potential savings; actual savings may vary based on use, utility rates and other factors. Calculations are based on national averages and assumptions and may be adjusted for a more accurate estimate of individual savings. While EnergyEarth strives to provide the most accurate information, we cannot guarantee the savings displayed.