Efficient comparable models for Water Heater

Model #1

\$279.99

Model #2

# Kenmore Power Miser 12, 50 gallon Electric Water Heater

## Sears item #04232154000 Mfr. model #32154

Includes a factory installed temperature and pressure relief valve and a long-life baked enamel exterior finish. Everlast Pexan™ polymer dip tubes, Super Limeguard™ elements and glass-lined steel tank.

Comparison of those model given by contactor and models chosen by me

 Appliances Capacity(gallon) Type Brand Price(\$) Power consumption(kWr/yr) Water Heater(given by contractor) 50 Electric Kenmore 250 4879 Model #1 55 Electric Kenmore 280 4721 Model #2(the best model) 50 Electric Kenmore 300 4622

To compare the efficiencies among those models

Model (given by contractor) – 250 + 4879 *10*.08 = 4153.2

Model #1                                 280 + 4721*10*.08 = 4056.8

Model #2                                 300+ 4622*10* .08= 3997.6

The Best model according to the comparison is

Model# 2

1.     How much additional money (if any) you need to invest to make your house appliances more energy efficient?

a.     300-250 = 50  \$50 additional money

2.     What will the total energy savings (kWh) per year if you replace the appliances with the energy efficient appliances?

a.     4879-4622 = 257 kWh/yr energy savings

3.     How much money will you save per year if you replace the appliances with the energy efficient appliances?

a.     0.08 * 257= 20.56   \$20.56 save per year

4.     What will be the overall (all appliances together) pay back period?

50/ (257 *.08) = 2.43  2.43years to recover the additional investment.

5.  How much money will you save over a period of 10 years.

20.56 * 10(saving money for 10 years) - 50( the additional money you need to invest)  =  155.6

You will save \$155.6 over a period of 10 years.

The Cleaner and Greenersm
"Pollution from Electricity Use" Calculator

- By choosing the most energy efficient model#2, you can prevent 261 pounds of Greenhouse gas and 5 milligram of mercury emissions per year.

See the actual calculation

Plug in 20.56(saving money per year)/12=1.71

## The Cleaner and Greenersm "Pollution from Electricity Use" Calculator

### Results:

Your Estimated Annual Electricity Usage (kWh):
(Calculated using the average electric generation emission factors and average electricity rate by customer type for the selected state)

Your Electricity Usage Causes the Following Pollution
Type of Pollution Amount of Pollution per Year
Greenhouse Gases (CO2) Pounds
Volatile Organic Compounds (VOC) Pounds
Nitrogen Oxides (NOx) Pounds
Carbon Monoxide (CO) Pounds
Sulfur Dioxide (SO2) Pounds
Particulates (PM 10) Pounds
Toxic Metals Pollution Amount of Pollution
Mercury (Hg) Milligrams

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