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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
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Closed-Cell Spray Foam for Sub-Slab Insulation
The pros and cons of using CCSF under a concrete slab
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Beyond Water Heaters
Water heating is a system, not just an appliance
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Zonal Pressure Diagnostics, Part III
Two methods for ensuring accurate blower-door test readings of zoned areas
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How to Insulate a Short Attic Kneewall
Back in my home-performance contracting days (2004 to 2007), I spent a lot of time in unconditioned attics and crawlspaces. First, I was there to find problems. Then, if the…
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The Ratio Rule for Hybrid Roof Insulation
Ensuring the right combination of R-values above and below a roof deck
