The Latest from the Energy Vanguard Blog

spacetime curvature modeling experimental data
Posted by Allison Bailes on February 26, 2015
Energy modeling has gotten a bad reputation in the home performance world. One conference I've attended has gone so far as to say that it's "outside the sandbox" of topics presenters can cover. They want to see data, not modeled results. And they have good reason for that.
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home energy rating hers index scale resnet reference home energy code
Posted by Allison Bailes on February 17, 2015
The HERS Index is a number that gives you a measure of how energy efficient a home is. We can debate how relevant that number is or how accurate is the energy model it's based on, but the fact is that it's being used. The 2015 International Energy Conservation Code (IECC) includes a compliance path...
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watersense low flush toilet water efficiency
Posted by Allison Bailes on February 11, 2015
Energy usually gets top billing in the green building community. It has a huge impact on the environment. We sometimes pay a significant amount for it (although most of us don't pay enough to motivate serious change, but that's another story). We can do energy modeling and home energy ratings. Plus...
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fiberglass insulation owens corning grade i
Posted by Allison Bailes on January 16, 2015
One of the major fiberglass insulation manufacturers (the color in the photo below gives away which one I'm talking about) is getting serious about the installation quality of fiberglass batt insulation. They've put out a video (embedded below) and a document showing how to achieve RESNET Grade 1...
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HERS rater training confirmed rating
Posted by Allison Bailes on September 30, 2014
The RESNET board of directors last week issued Formal Interpretation 2014-04 (pdf). If you're on RESNET's mailing list, you may not have noticed this one come through on 24 September because they send out so many emails, but it's an important one to look at. It's titled "Clarification of Training...
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stockton research project hers rating discrepancy grange
Posted by Allison Bailes on September 16, 2014
A home energy rating is supposed to tell you how energy efficient your home is. A certified home energy rater goes to the home and collects all the data relevant to energy consumption in the home (well, all the data included in the rating anyway, which is almost everything). Then they enter the...
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How can RESNET improve the consistency of the HERS Index?
Posted by Allison Bailes on August 29, 2014
In case you haven't heard, last year RESNET created a task force to look at ways to improve the consistency of results among certified home energy raters (aka HERS raters). One week ago, executive director Steve Baden sent an email about the latest developments in the process. He also attached a...
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home energy hers rater training class cantilever floor
Posted by Allison Bailes on June 7, 2014
We just completed our first combined online and in-person home energy rater training class. I've been wanting to do this for a while now because I've suspected that our attempt to buck the industry preference for a 5-day class by doing ours in 8 days was keeping our registration numbers low. At the...
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home energy rater hers training class vent cap
Posted by Allison Bailes on April 11, 2014
No, this is not an April Fool's joke (as much as I do like writing them, even when it's not 1 April). We've abandoned our 8-day in-class HERS rater training format. Beginning with our next class, the in-class part will last five and a half days. Did you catch the clue in that last sentence?
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aci affordable comfort national conference detroit 2014
Posted by Allison Bailes on March 28, 2014
If you work in the fields of home building, home improvement, or HVAC and want to do the best work you can, you know that you've got to keep learning. Not only is there a tremendous amount to know, but things are always changing. Here are four great opportunities for you to continue your building...
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