Heat Flow
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A Fresh Look at R-Value
Marketers of radiant barriers and spray foam have a history of false statements about R-value
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My Top 10 Building Science and Energy Efficiency Ideas of 2015
A year-end review of the articles and ideas that made me think
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The Fundamentals of Series and Parallel Heat Flow
The R-value of a building assembly depends on how heat can flow through it
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Calculating Heating Degree Days
A lot of people know the number of HDD for their location — but where does that number come from?
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The Diminishing Returns of Adding Insulation
A look at the numbers behind this oft-heard expression
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The Top Two Reasons Powered Attic Ventilators Are a Waste of Money
Despite how fervently some people believe in them, powered attic ventilators don’t pass building science muster
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Solving Comfort Problems Caused by Attic Kneewalls
Insulation and air-sealing are key