The Elusive Search for an Energy-Efficient Water Heater

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The Elusive Search for an Energy-Efficient Water Heater

My Sunday kayak adventure with my wife and friends on Lake Tahoe was magic. Paddling that beautiful lake relaxed me to the point where, by the time I reached home, I was ready for a ...

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Money Down the Drain: Controlling Hot Water Recirculation Costs

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November 01, 1999

Energy use for domestic hot water (DHW) is the second largest component of a multifamily building's energy budget; it is surpassed only by heating in cold and mixed climates. [continue reading]

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Fuel Use in Multifamily Buildings

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November 01, 1999

Multifamily buildings with more than five units make up about 17% of all U.S. housing, yet scant information exists on the fuel use of these building in specific locations (see "Multifamily Statistics"). [continue reading]

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Ground Source Heat Pumps Dig In

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September 01, 1999

Ground source heat pumps (sometimes called geothermal heat pumps, Geo-Exchange Systems, or GHPs) most often exchange heat with the ground by means of a ground heat exchanger. [continue reading]

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Calculating Water Heater Energy Use

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July 01, 1999

Have you ever wanted to calculate how much energy a water heater would use annually in a given household? To make this task easier, Lawrence Berkeley National Laboratory (LBNL) has developed a straightforward equation that produces results close to those of simulation programs--without their baffling complexity. [continue reading]

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Making Solar Hot Water Affordable

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January 01, 1999

In 1995, a group of agencies in Florida teamed up to bring low-cost solar systems to low-income households so they could save money on their utility bills. [continue reading]

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Hot Water Improvements Top Warm Climate Weatherization Measures

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September 01, 1998

Reducing hot water costs is the most cost-effective way to save money for low-income housing in warm climates. This is one conclusion that can be drawn from a new study on the cost-effectiveness of energy-saving measures for low-income housing in warm climates. [continue reading]

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Water Saving Gadgets Make a Splash

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July 01, 1998

The National Plumbing Standards passed by Congress in 1992 as part of the Energy Policy Act marked a turning point for U.S. manufacturers of toilets, faucets, and showerheads. [continue reading]

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Multifamily Research Gets in Hot Water

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July 01, 1997

Many plumbing and heating designers have considered the tankless coil heating system to be the least efficient method of heating domestic hot water (DHW) in a multifamily building. [continue reading]

Side Benefits of a Passive House

Rob Nicely

Side Benefits of a Passive House

There’s no doubt that building to Passive House standards results in energy consumption that’s about 70 to 80 ...

Very Cool: Heat Pump Water Heaters Save Energy and Money

Pierre Delforge and Christina Swanson

Very Cool: Heat Pump Water Heaters Save Energy and Money

A new NRDC study shows that water heaters that use high efficiency heat pump technology—the same process that ...

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