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Common Mechanical Room Obstructions
When designing a new house, give thought to where the ducts will go and exactly how they will get there
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7 Tips for Good Indoor Air Quality in Winter
While most of this advice applies year-round, there are a few nuances related to improving indoor air quality during the winter months
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Getting the Most Out of Blower Door Test Results
Understanding blower door calculations beyond air exchanges per hour at 50 Pascals can yield useful information for achieving efficiency goals
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Three Types of Heat Pumps
Pros and cons of single-, two-, and multi-stage heat pumps for heating and cooling
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Hydrogen and Replacing Fossil Fuels
A color-coded guide to the most abundant element in the universe, hydrogen, which is poised to play a large role in phasing down fossil fuels and cleaning up the grid
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How Well Do You Understand Psychrometrics?
Test your knowledge of the science of moist air and how it behaves under different environmental conditions
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Addendum to Continuous Insulation Series
This update sheds light on ICC processes and how they can impact the reading of codes, plus how to satisfy R-value requirements using wall cavity insulation only
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Hot Water System Retrofit
A DIY engineered hot water system uses a hybrid water heater in heat pump–only mode with a high-efficiency boiler and indirect heater
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Sizing a Heat Pump System for Cooling
Remember this rule of thumb: 5 tons is never the answer
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Open-Loop vs. Closed-Loop Ground Source Heat Pumps
Some basics on the two types of GSHP systems and cautionary advice against a side-by-side comparison