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Directory: Catalog > Water
Heaters > Bosch Tankless Water
Heaters
Energy Savings Chart for Bosch Tankless Water Heaters
| Gas |
Energy Factor |
Annual Cost
to Operate* |
Annual
Savings(1) |
Annual
Savings(2) |
| Natural Gas |
| 635 ES/ESO |
0.85 |
$250 |
$110 |
$151 |
| 425 HN/HNO |
0.80 |
$266 |
$95 |
$135 |
| 425 EF |
0.78 |
$273 |
$88 |
$129 |
| 40-gallon tank |
0.59 |
$361 |
|
|
| 75-gallon tank |
0.53 |
$410 |
|
|
| Liquid Propane |
| 635 ES/ESO |
0.86 |
$355 |
$163 |
$221 |
| 425 HN/HNO |
0.84 |
$364 |
$154 |
$213 |
| 425 EF |
0.81 |
$377 |
$141 |
$199 |
| 40-gallon tank |
0.59 |
$518 |
|
|
| 75-gallon tank |
0.53 |
$577 |
|
|
| Electric |
Energy Factor |
Cost to Operate** |
Annual Savings(3) |
Annual Savings(4) |
| RP17PT |
0.90 |
$478 |
$0 |
$22 |
| RP27PT |
0.94 |
$458 |
$20 |
$43 |
| 50-gallon tank |
0.90 |
$478 |
|
|
| 80-gallon tank |
0.86 |
$500 |
|
|
*The above charts represent approximate energy savings figures based on U.S.
Dept. of Energy test method for water heaters. The energy costs used are the 2006
averages as published by DOE - $1.42/therm for natural gas and $1.95/gallon for
propane.
Annual Savings(1) - Compared to a new 40-gallon tank water heater of the most
popular model.
Annual Savings(2) -Compared to a new 75-gallon tank water heater of the most popular
model.
**The above charts represent approximate energy savings figures based on U.S.
Dept. of Energy test method for water heaters. The energy costs used are the 2006
averages as published by DOE - $0.098/kWh.
Annual Savings(3) - Compared to a new 50-gallon storage tank with Energy Factor
.90 (most popular model).
Annual Savings(4) - Compared to a new 80-gallon storage tank with Energy Factor
.86 (most popular model).
Information Source: Bosch Water Heating
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