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Location Efficiency
The energy impact of where we build
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Direct-Gain Passive Solar Heating
A way to heat a house without combustion, electricity, or moving parts
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Trombe Walls
An easy way to turn a south-facing masonry wall into a passive solar heating system — in the right climate
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Sunspaces – Solar Heat and a Place to Grow Plants
A simple passive-solar heating system that provides pleasant living space
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Heating with Oil or Gas: What’s to Like?
We may not like it, but heating with oil or gas is really convenient.
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What’s the Greenest Option for Home Heating?
Examining electricity and wood pellets for home heating
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Drive-by Energy Audits
After a snowfall, drive-by energy audits tell you at a glance how energy efficient houses are — and which have ice dam problems.
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Energy Return on Investment
A look at the ‘net energy’ of different energy sources — how much energy it takes to produce energy
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Thoughts on the Future of Petroleum
What ever happened to "peak oil"?
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Our History of Petroleum Use
Our use of petroleum through history may surprise some readers