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Planning a Furnace-to-Ducted Heat Pump Retrofit, Part 1: Needs Assessment
The advantages of using an air handler when replacing a gas furnace with heat-pump technology
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Three Ways to Insulate Roofs
There are many ways to insulate attics and roofs, but these are the safest methods
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Deep-Energy Retrofit of a Centuries-Old Warehouse
A historical commercial building is turned into a live-work space using building-science principles
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The Value and Limits of Manual J
These basic energy models can teach us more about our plans than what heating and cooling loads to expect
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Why Does Hot Water Take So Long?
The reason is the volume of water in the pipe and the solution is to decrease pipe size and length
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The Benefits of a Heat-Pump Water Heater
A case study demonstrating the worth of all-electric water heaters
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Measuring the Efficiency of a Room Dehumidifier
Several ago, I wrote about the confusing world of dehumidifier capacity. That quantity tells you how much water a dehumidifier will produce in a given amount of time. Here in…
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Do Women Need Warmer Temperatures Than Men?
The science says: No. ASHRAE’s thermal comfort standard lists six factors that affect everyone's comfort
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How to Meet Air Leakage Requirements
First time meeting code air leakage requirements? Here’s what you need to know.
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When is Humidity Low Enough to Open Windows?
Dew point is the key metric for determining when outdoor air is less humid than indoor air
