I'm not sure it would be applicable here in TV, but in a previous home in Missouri we used a geothermal heat pump system that we included as a component in new construction. A by-product of the geothermal system running was the production of hot water. We had two 50 gallon water heaters that never ran out of hot water, much as a teenage daughter might try! In an all-electric 4,000 sq ft home, our electric bills averaged about $165 per month. The hot water was basically "free."
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