| Fill in the blanks in the grey shaded areas. This comparison does not reflect stand-by heat loss; or recovery. | |||||||||
| This comparison is not a true reflection of energy use over time; only the costs to heat one tank of water from a cold start; | |||||||||
| and see how the 3 fuels compare. This spreadsheet uses the actual calculations from the GAMA Directory. | |||||||||
| Visit GAMA on the web at http://www.gamanet.org | |||||||||
| Natural Gas | ** To determine yearly cost multiply daily cost time 365 | ||||||||
| Volume of | Temperature | BTUs | EF rating | BTUs | Actual | ||||
| Hot Water | H2O Weight | rise in | required | of the | purchased | Cost per | daily cost to | ||
| Heated | degrees F | to | water heater | to heat | therm | heat the | |||
| heat water | water | water ** | |||||||
| 64 | 8.33 | 77 | 41,050 | 0.62 | 66,210 | $1.2000 | $0.795 | ||
| Electric | |||||||||
| Volume of | Temperature | BTUs | EF rating | BTUs | Actual | ||||
| Hot Water | H2O Weight | rise in | required | of the | purchased | Cost per | daily cost to | ||
| Heated | degrees F | to | water heater | to heat | KW/hour | heat the | |||
| heat water | water | water ** | |||||||
| 64 | 8.33 | 77 | 41,050 | 0.94 | 43,670 | $0.0841 | $1.076 | ||
| BTUs are used to convert electric for comparion purposes. The math calculation is accurate for electricity. | |||||||||
| Propane Gas | |||||||||
| Volume of | Temperature | BTUs | EF rating | BTUs | Cost per | Actual | |||
| Hot Water | H2O Weight | rise in | required | of the | purchased | gallon | daily cost to | ||
| Heated | degrees F | to | water heater | to heat | propane | heat the | |||
| heat water | water | water ** | |||||||
| 64 | 8.33 | 77 | 41,050 | 0.62 | 66,210 | $1.2100 | $0.875 | ||
| Tankless | |||||||||
| Volume of | Temperature | BTUs | EF rating | BTUs | Cost per | Actual | |||
| Hot Water | H2O Weight | rise in | required | of the | purchased | gallon | daily cost to | ||
| Heated | degrees F | to | water heater | to heat | propane | heat the | |||
| heat water | water | water ** | |||||||
| 64 | 8.33 | 77 | 41,050 | 0.82 | 50,061 | $1.2000 | $0.656 | ||
|
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