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The California Model
Why can’t all states adopt California’s approach to energy efficiency?
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Ensuring Fresh Air in Bedrooms
New CO2 measurements raise concerns about bedroom air quality
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Building a Passive House for $163 per Square Foot
This superinsulated single-family home in Rhode Island cost $300,420 to build
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Another Perspective on Air-to-Water Heat Pumps
Jake Marin weighs the pluses and minuses of connecting an air-source heat pump to a hydronic distribution system
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Bruce Harley’s Minisplit Tips
Expert advice on air-source heat pumps
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Henri Fennell’s Advice on Cathedral Ceilings
It’s all about the air barrier
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Exterior Insulation over Masonry Cladding
The best way to insulate an old brick building is with a continuous exterior layer of rigid foam
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Reports from Owners of High-Performance Homes
Owners of new energy-efficient homes talk about the joys and frustrations that accompanied their projects
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Newspapers Trumpeted ‘Solar Homes’ in the 1940s
After a major glass manufacturer promoted passive solar homes in the late 1940s, interest in the topic all but disappeared for thirty years
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Marc Rosenbaum’s Monitoring Results
Measurements reveal clues about the performance of an ERV, a hot-water circulation system, and several minisplit heat pumps