Computer Science
Home Energy Efficiency Authentic Assessment
Directions: Complete the energy calculations for the energy cost and cost recuperation for both types of appliances, then complete the reflection questions.
Part 1: Refrigerator
Energy Star Refrigerator
Non-Energy Star Refrigerator
Model #: Frigidaire FFHT1832T
Model #: Frigidaire FFTR1821T
Style: Top mount door
Style: Top mount door
Cubic Feet: 18 cubic feet
Cubic Feet: 18 cubic feet
Yearly Energy Usage (from Energy Guide): 363 kWh/yr
Yearly Energy Usage (from Energy Guide): 404 kWh/yr
Picture of Appliance:
Picture of Appliance:
Website Link to Retail Store
Website Link to Retail Store
Purchase Price: (1) $1,246.80
Purchase Price: (2) $1,186.80
Yearly Energy Use (in kWh): 363 kWh/yr
Yearly Energy Use (in kWh): 404 kWh/yr
Energy Cost per Year
(Energy usage in kWh from above x 13.19 cents/kWh ): (3)
Energy Cost per Year
(Energy usage in kWh from above x 13.19 cents/kWh ): (4)
Cost Recuperation Estimation
Initial Cost Difference: Energy Star Appliance Price (1) ‒ Non-Energy Star Appliance Price (2)
Calculation (Show Your Work):
This is the original upfront price difference. In other words, how much more money the Energy-Star Appliance costs.
Cost Per Year Difference: Non-Energy Star Appliance Energy Cost (4) ‒ Energy-Star Appliance Energy Cost (3)
Calculation (Show Your Work):
This is how much money you will save each year by choosing an Energy-Star Appliance.
Time to Recuperate Your Upfront Cost: Initial Cost Difference from #1 / Cost Per Year Difference from #2
Calculation (Show Your Work):
This is how many years it will take for you to recoup your initial investment and start saving money.
Part 2: Washing Machine
Energy Star Washing Machine
Non-Energy Star Washing Machine
Model #: GTW500ASN
Model #: GTW465ASN
Style: Top Loader
Style: Top Loader
Cubic Feet: 4.5 cubic feet
Cubic Feet: 4.5 cubic feet
Yearly Energy Usage (from Energy Guide): 210 kWh/yr
Yearly Energy Usage (from Energy Guide): 175 kWh/yr
Picture of Appliance:
Picture of Appliance:
Website Link to Retail Store
Website Link to Retail Store
Purchase Price: (1) $498.00
Purchase Price: (2) $478.00
Yearly Energy Use (in kWh): 175 kWh/yr
Yearly Energy Use (in kWh): 210 kWh/yr
Energy Cost per Year
(Energy usage in kWh from above x 13.19 cents/kWh ): (3)
Energy Cost per Year
(Energy usage in kWh from above x 13.19 cents/kWh ): (4)
Cost Recuperation Estimation
Initial Cost Difference: Energy Star Appliance Price (1) ‒ Non-Energy Star Appliance Price (2)
Calculation (Show Your Work):
This is the original upfront price difference. In other words, how much more money the Energy-Star Appliance costs.
Cost Per Year Difference: Non-Energy Star Appliance Energy Cost (4) ‒ Energy-Star Appliance Energy Cost (3)
Calculation (Show Your Work):
This is how much money you will save each year by choosing an Energy-Star Appliance.
Time to Recuperate Your Upfront Cost: Initial Cost Difference from #1 / Cost Per Year Difference from #2
Calculation (Show Your Work):
This is how many years it will take for you to recoup your initial investment and start saving money.
Part 3 Reflection Questions
After completing this assignment, do you think Energy Star Appliances are worth the investment?
Why do you think consumers do not purchase Energy Star Appliances?
Besides switching to Energy Star Appliances, identify and describe 3 other ways you can reduce your energy use at home.