U.S. Department of Energy - Energy Efficiency and Renewable Energy
Consumer's Guide – Energy Calculators and Software
Water Heating Systems
Learn how to evaluate your water heating and pool heating systems and determine the feasibility of more energy efficient systems.
Water Heating Evaluation
To evaluate a potential water heating system for your home or your existing water heater, see the following information:
If you haven't chosen a particular water heating system, you may want start with our information about selecting a new water heater, which also includes information about the types of water heaters available.
Water Heating Calculators
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Estimate the lifetime energy savings of electric and gas water heaters with various levels of energy efficiency. From the U.S. Department of Energy
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Estimate the price, savings, and system size of solar energy systems to produce electricity, heat your water, or heat your spa or pool. From the American Solar Energy Society, the Solar Electric Power Association, Energy Matters LLC, and the U.S. Department of Energy
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Determine your water heater's energy usage and estimate whether a solar water heater could save you money. From the Texas State Energy Conservation Office.
Swimming Pool Heating
For evaluating swimming pool heating systems, see the following:
If you haven't chosen a particular swimming pool heating system, you may want start with our overview of available pool heating information.
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