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FEMP [Federal Energy Management Program] Designated Product: Gas Water Heaters
Consumer information about gas water heaters, covering efficiency recommendations, cost effectiveness, technology options (such as demand-type and solar assisted water heaters), and other tips for buying and using water heaters. Includes a cost calculator. From the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy.
http://www1.eere.energy.gov/femp/technologies/eep_gas_waterheaters.html

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