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Water Heating
Fact sheet on water heating, which "next to heating or cooling ... is typically the largest energy user in the home." Discusses types of water heaters (storage, demand, heat pump, indirect, and solar), selection, efficiency, cost comparison, and upgrading your current water heater. From the online version of the Consumer Guide to Home Energy Savings published by the American Council for an Energy-Efficient Economy.
http://www.aceee.org/consumerguide/waterheating.htm

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