Energy Vanguard


by founder @AllisonBailes. Authoritative source for info on building science, HVAC, energy efficiency + random, odd, fun stuff, including juggling.

Photos and Videos by @EnergyVanguard

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Most of the world uses mini-split heat pumps. Take our webinar & find out why you should, too.

  • 1257 days ago via site
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Joe Lstiburek's morning wisdom, from the Building Science group on LinkedIn today.

  • 1263 days ago via site
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Meet Jeffrey Sauls, our BPI guy. He wanted me to tell you our Early Bird discount ends Friday.

  • 1270 days ago via site
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OK, , here's a photo of my Einstein action photo. Now do you believe it?

  • 1270 days ago via site
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I had a great day teaching our HERS rater class today! Anyone know what this stuff means?

  • 1271 days ago via site
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Guess what our HERS rater class students are about to do!

  • 1274 days ago via site
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US primary energy consumption, the Sankey diagram showing what goes in & what comes out. 2010 version.

  • 1278 days ago via site
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If you bought a sandwich with onions at Publix last month, it has been recalled. Please return it.

  • 1282 days ago via site
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Going out on a site visit this morning to look at the install of a ducted mini-split heat pump job. #HVAC

  • 1282 days ago via site
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Follow all the tweets from Building Science Summer Camp at #bscamp.

  • 1292 days ago via site
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My friend & electrician, Zot, wired this for me 10 years ago in the house I built. What do you think?

  • 1293 days ago via site
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OK, all you energy geeks, what does this playground slide have to do with building science?

  • 1296 days ago via site
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Yes, that's an air conditioner condensing unit. Yes, it's in the attic. No, it's not a good idea.

  • 1302 days ago via site
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Release the Kraken! << A slightly reworded version of the graphic I created last week.

  • 1305 days ago via site
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Here's a good reason your home may have difficulty staying cool on super-hot days: A super dirty filter!

  • 1306 days ago via site
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It's Friday and the Energy Avenger says it's time to kick back & have a cold one!

  • 1309 days ago via site
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I'm up in the NC mountains this week & 3 baby juncos hatched in a nest on our deck. Look at that hungry mouth!

  • 1316 days ago via site
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My handy-dandy Celsius-Fahrenheit conversion table. I keep one in my head at all times. (corrected version)

  • 1325 days ago via site
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It amazes me how often the bath fan housing gets installed like this. That 180° turn cuts air flow drastically.

  • 1331 days ago via site
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It's summer time! Turn on the ceiling fan. Well, it's a kind of ceiling fan, right?

  • 1332 days ago via site
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