The Latest from the Energy Vanguard Blog

Bathroom exhaust fan brings humid air into the house
Posted by Allison Bailes on July 20, 2018
Nope.  Today is not the first of April.  Nor is this one of those special April Fools' Day articles I write at random times.  This one's real.  A white noise generator has now been used in at least one home to reduce indoor humidity.  And no, this isn't an amazing scientific breakthrough either....
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ASHRAE 62.2 standard for residential ventilation
Posted by Allison Bailes on June 29, 2018
It's been a while since I've written about what I had been calling "The Great Ventilation Debate" back when Joe Lstiburek was battling the ASHRAE 62.2 residential ventilation committee.  The 62.2 committee meets in person twice a year at the two ASHRAE conferences and they just met last Friday and...
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Ventilation grille bringing in straight outdoor air at the ASHRAE conference hotel in Houston, Texas  (photo by Nikki Krueger of Therma-Stor, used with permission)
Posted by Allison Bailes on June 24, 2018
I've been going to the meetings of the ASHRAE residential ventilation committee (SSPC 62.2, to be specific) for the past few years.  As a matter of fact, I'm writing this article from my room in Houston, the site of the summer meeting.  It's always interesting to go to these things because the...
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ventilation energy enthalpy recovery ventilator erv humidity
Posted by Allison Bailes on January 9, 2018
When I woke up Saturday morning, the temperature outdoors was -40 degrees†. The wind chill was -100 degrees! It was just unbelievably, impossibly, inhumanly cold outside. Fortunately, that was on a mountaintop in New Hampshire and not where I was. I happened to have woken up on a mountaintop in...
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Green buildings can make you smarter
Posted by Allison Bailes on October 10, 2017
The room is dead silent. You stare down at the paper on your desk, ransacking your brain for any hint of the answer to this test question that has you stumped. Your desperation mounts as you know the teacher is about to call for your test to be turned in. Why can't I figure this out, you think. But...
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Air sealing the Build SMART wall panels with a sausage gun
Posted by Allison Bailes on May 1, 2017
Seven years ago Georgia led the nation. Yep. We were the first state to adopt an energy code that made blower door testing mandatory. All new homes built in the state had to show through performance testing that they had an air leakage rate of less than 7 air changes per hour at 50 Pascals of...
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This heat recovery ventilator is inside the building enclosure
Posted by Allison Bailes on February 10, 2017
If you've been hanging around here for a while, you know I encourage architects and builders to find a way to get the ductwork and heating and cooling systems inside the conditioned space of a home. In cold climates, this usually happens without much argument. In hot and warm climates, we're not...
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ventilation energy enthalpy recovery ventilator erv humidity
Posted by Allison Bailes on January 25, 2017
"You know where this is going, right? Codes will eventually require balanced ventilation." I've heard people say this more than once in the past year or so. As someone who has been attending the semiannual meeting of the ASHRAE 62.2 committee, I've been skeptical. Then I read the new Aspen energy...
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humidifier-indoor-humidity-mold.jpg
Posted by Allison Bailes on November 14, 2016
It's that time of year when heating systems start coming out of their summer hibernation. (Except maybe in Vermont. Michael Blasnik's Nest data showed that Vermonters are about the last to start heating their homes in Fall.) Then everyone starts looking for their lotion and lip balm. Gaps appear in...
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basement-moisture-problem-mold-humidity.jpg
Posted by Allison Bailes on October 31, 2016
Lying in bed. Feel like I've run a world record mile. Can't...catch...my...breath. I take the deepest breath I can. The noisy air provides little sustenance for my oxygen-starved lungs.
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