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Measuring Natural Air Leakage
How to calculate ACHnat and reasons it can be a useful metric
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Why is There Frost in the Attic?
If you've ever seen frost in the attic in winter, it's pretty to easy to understand why it's happening. It's the same thing that causes morning dew on the grass,…
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Calculating Thermal Bridging in a Wood-Framed Building
An explanation of how to account for heat loss through lumber framing
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Continuous Air Barrier Between Garage and House
A method for controlling air movement between garage and house to ensure healthy indoor air quality in living spaces
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Make-up Air in Tight Houses
When homes are well air-sealed, negative pressures and supply air pose unique challenges
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House Size and Air Leakage
The 2021 IECC helps close the large-house loophole
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Make It a Mechanical Room, Not Just a Closet
HVAC equipment is expensive and critical for the health of occupants and buildings, so design the right-sized conditioned space to house it
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Four Ways to Duct a Dehumidifier
From best to pretty good, here are four approaches to ducting for dehumidification
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Heat Pump Electrical Requirements
Understanding the principles and terminology behind heat pump systems is important for sizing and installation
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The Meaning of Rejected Energy
Understanding the relationship between fossil fuels, heat engines, waste heat, and the need for renewable energy
