Domestic Water Heaters
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Air-to-Water Heat Pump Retrofit
A mechanical engineer shares lessons learned after replacing his propane boiler with an air-to-water heat pump to heat his home
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Heat-Pump Water Heaters in Cold Climates
Heat-pump water heaters save energy on a year-round basis — but during the winter, the energy savings will drop
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Drainline Heat Exchangers
This simple system for recovering heat from wastewater makes a lot of sense — especially for homes and commercial buildings that use a lot of hot water
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Hybrid Water Heaters
A relatively new type of water heater combines features of both tankless and storage water heaters
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Getting into Hot Water — Part 1
Choosing between an electric-resistance water heater and a solar thermal system
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The Difference Between Storage and Tankless Water Heaters
While offering higher efficiency, electric tankless water heaters usually don't make sense
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Get Rid of Your Gas Water Heater!
Electric resistance and heat-pump water heaters make more sense
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Green Building Programs: Time for a Do-Over?
Why is it that the things I care so much about are now making me so crazy?
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What Is a Deep Energy Retrofit?
Beyond weatherization, a deep energy retrofit is a remodel that aims to cut energy use by at least 50%. How deep can you go? The sky (and your budget) is the limit.
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Now’s the Time to Install Solar
Solar tax credits are due to be in place until 2016, but they could end well before then
