Wandering_Burr
New Member
I am looking at replacing my 50 gallon NG Water Heater and aside from the up front costs of electric/condensate line/capping the gas and vent (which are not small), the EPAs calculators appear to show a significant savings over ten years versus Natural Gas. Despite my searches this topic doesn't seem to come up so I am here to get a sanity check.
First the basic check of the US Govt Energy Guide sticker. Rheem 50 gallon natural Gas (XG50T12HE40U0) $288/year. Rheem Hybrid (XE50T10H45U0) $104. So ten years is a $1804 savings using national averages on use and utility pricing.
Plugging in my local pricing using the formulas here https://www.energy.gov/energysaver/...cy-storage-demand-and-heat-pump-water-heaters
using my SDG&E blended rates of $1.90/therm on gas and $0.29 for kWh I get between $1050 and $4500 savings over ten years depending on how much my solar array contributes.
Family of four in a four bath house and one oversize tub. We never have had issues with hot water even with large populations of guests. Would run the Hybrid at 140 with a tempering valve and think we'd be ok with supply but this is mostly based on others online saying it supplies enough water.
SDG&E gives a $500 instant rebate and Feds give $300 so a Rheem 50 gallon unit would be a couple of hundred less than a NG one out the door. So if installation costs aren't outrageous seems like the way to go.
Better for the planet. Cheaper to own over time. If I run it at 140 degrees seems like the rate of recovery would be good enough to keep us ok for 3-4 showers over a couple of hour period. What am I not considering?
First the basic check of the US Govt Energy Guide sticker. Rheem 50 gallon natural Gas (XG50T12HE40U0) $288/year. Rheem Hybrid (XE50T10H45U0) $104. So ten years is a $1804 savings using national averages on use and utility pricing.
Plugging in my local pricing using the formulas here https://www.energy.gov/energysaver/...cy-storage-demand-and-heat-pump-water-heaters
using my SDG&E blended rates of $1.90/therm on gas and $0.29 for kWh I get between $1050 and $4500 savings over ten years depending on how much my solar array contributes.
Family of four in a four bath house and one oversize tub. We never have had issues with hot water even with large populations of guests. Would run the Hybrid at 140 with a tempering valve and think we'd be ok with supply but this is mostly based on others online saying it supplies enough water.
SDG&E gives a $500 instant rebate and Feds give $300 so a Rheem 50 gallon unit would be a couple of hundred less than a NG one out the door. So if installation costs aren't outrageous seems like the way to go.
Better for the planet. Cheaper to own over time. If I run it at 140 degrees seems like the rate of recovery would be good enough to keep us ok for 3-4 showers over a couple of hour period. What am I not considering?
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