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Night Surveys: The Lights Are On, But Nobody is Home
How Yale University's energy manager uses after-hours walk-throughs to save energy
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The Buy-in Problem
From code compliance to Passive House certification, getting good work from contractors is hard
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Exterior Insulation on 2×4 Walls Versus 2×6 Walls With Cavity Insulation Only
A look at some modeling results may help you decide
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How Does a Heat Pump Get Heat From Cold Air?
The physics of heat pumps isn’t really that difficult to understand
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Extending the Reach of a Moisture Meter
Simple ways to measure moisture content deeper into building assemblies
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Two Rules for Humidity
To prevent moisture damage from humid air, just do these two things
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The Four Laws of Thermodynamics
We often talk of the second law, but what are the other three?
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How Many Tons of Air Does a 2.5 Ton Air Conditioner Move?
And under what conditions would it move exactly 2.5 tons of air?
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Water Tables and Basements
How to use geologic, soil, and historical maps to keep your basement dry
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Door Undercuts for Return Air
You don’t always need to install individual returns, transfer grilles, or jumper ducts