If You Were Plumbing, How Much Beer Would You Hold?

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If You Were Plumbing, How Much Beer Would You Hold?

You open the hot-water tap. Then you wait for the hot water to flow. How long? (Too long, according to most people, I say.) The time depends on flow rate, the amount of water in ...

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If You Were Plumbing, How Much Beer Would You Hold?

Author: Gary Klein
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December 10, 2018

You open the hot-water tap. Then you wait for the hot water to flow. How long? (Too long, according to most people, I say.) The time depends on flow rate, the amount of water in ... [continue reading]

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A Solar-Assisted Heat Pump Water Heater

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December 10, 2018

Water heating in residential buildings has become more important as the overall efficiency of buildings has improved over the last decade, with energy efficiency code requirements for A/C, lighting, and the building envelope. Modest ... [continue reading]

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Heat Pump Water Heaters: Bring Them Upstairs?

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September 14, 2018

Heat pump water heaters are seeing increasing use in homes. They go well with solar PV and so support strategic electrification to reduce carbon emissions. And they are more efficient than electric-resistance water heaters. Several ... [continue reading]

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Builder-Installed Electrical Loads

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September 14, 2018

Parts of the House That Stay On [continue reading]

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Choices in PEX Manifold Systems

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June 14, 2018

There are a number of ways to combine PEX tubing with manifolds to get better-than-normal hot-water delivery in a home. In the old days, manifolds were sometimes used with soft copper tubing, but as copper ... [continue reading]

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Measured Performance of Ducted and Space-Coupled Heat Pump Water Heaters in a Cooling-Dominated Climate

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February 13, 2017

The Building America Partnership for Improved Residential Construction, led by the Florida Solar Energy Center, investigated the effect of ducted and interior-located heat pump water heaters (HPWHs) on space-conditioning energy use and water-heating energy use ... [continue reading]

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Water Heating in All-Electric Homes

Author: Robb Aldrich
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April 30, 2016

When I started working in the home energy field (in the mid-1990s), I never imagined I’d be suggesting that all-electric homes could be among the most efficient, sustainable, and practical choices in ... [continue reading]

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A Passion for High-Performance Plumbing Systems

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February 29, 2016

Turn on the faucet, then wait, wait, wait for the water to get hot. Many owners of older homes are familiar with this scenario. Fortunately for buyers of new homes, home builders now have a ... [continue reading]

Manufactured Housing Equals Green Housing

Olga Zheliabina

Manufactured Housing Equals Green Housing

Concerns about the environment and climate change have everyday Americans more determined than ever to do their part to reduce ...

Tennessee’s WAP Teams Up with TVA to Reduce Operational Friction, Serve More

Frank Rapley

Tennessee’s WAP Teams Up with TVA to Reduce Operational Friction, Serve More

The Tennessee Valley Authority (TVA), where I work as a senior manager, is a corporate agency of the United States ...

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